Update: Changelog for 15.0-beta2 (#13738)

Co-authored-by: Michael Lutz <michi@icosahedron.de>

.github/changelog.py

@@ -0,0 +1,36 @@
+import sys
+
+"""
+This script assumes changelogs use the following format:
+    ## <major>.x (eg. "## 15.x") to indicate a major version series
+    ### <major>.<minor>[-<suffix>] <date etc> (eg. "## 15.0 (2025-04-01)", "### 15.1-beta1 (2024-12-25)") to indicate an individual version
+"""
+
+def main():
+    current_version = sys.argv[1]
+    stable_version = current_version.split("-")[0]
+    major_version = current_version.split(".")[0]
+    # set when current version is found
+    current_found = False
+
+    with open("changelog.md", "r") as file:
+        for line in file:
+            if line.startswith("### "):
+                if not line.startswith(f"### {current_version} ") and not current_found:
+                    # First version in changelog should be the current one
+                    sys.stderr.write(f"Changelog doesn't start with current version ({current_version})\n")
+                    sys.exit(1)
+                if not line.startswith(f"### {stable_version}"):
+                    # Reached a previous stable version
+                    break
+                if line.startswith(f"### {current_version} "):
+                    current_found = True
+            elif line.startswith("## "):
+                if not line.startswith(f"## {major_version}.x"):
+                    # Reached a previous major version
+                    break
+
+            print(line.rstrip())
+
+if __name__ == '__main__':
+    main()

.github/changelog.sh

@@ -1,16 +0,0 @@
-#!/bin/sh
-
-tag=$(git name-rev --name-only --tags --no-undefined HEAD 2>/dev/null | sed 's@\^0$@@')
-
-# If we are a tag, show the part of the changelog till (but excluding) the last stable
-if [ -n "$tag" ]; then
-    grep='^[0-9]\+\.[0-9]\+[^-]'
-    next=$(cat changelog.md | grep '^[0-9]' | awk 'BEGIN { show="false" } // { if (show=="true") print $0; if ($1=="'$tag'") show="true"} ' | grep "$grep" | head -n1 | sed 's/ .*//')
-    cat changelog.md | awk 'BEGIN { show="false" } /^[0-9]+.[0-9]+/ { if ($1=="'$next'") show="false"; if ($1=="'$tag'") show="true";} // { if (show=="true") print $0 }'
-    exit 0
-fi
-
-# In all other cases, show the git log of the last 7 days
-revdate=$(git log -1 --pretty=format:"%ci")
-last_week=$(date -d "$revdate -7days" +"%Y-%m-%d %H:%M")
-git log --after="${last_week}" --pretty=fuller

.github/workflows/ci-emscripten.yml

@@ -12,7 +12,8 @@ jobs:
 
     runs-on: ubuntu-latest
     container:
-      # If you change this version, change the number in the cache step too.
+      # If you change this version, change the numbers in the cache step,
+      # .github/workflows/preview-build.yml (2x) and os/emscripten/Dockerfile too.
       image: emscripten/emsdk:3.1.57
 
     steps:
@@ -23,9 +24,18 @@ jobs:
       run: |
         git config --global --add safe.directory ${GITHUB_WORKSPACE}
 
+    - name: Update to modern GCC
+      run: |
+        apt-get update
+        apt-get install -y gcc-12 g++-12
+        update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 100
+        update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-12 100
+
     - name: Setup cache
       uses: actions/cache@v4
       with:
+        # If you change this version, change the numbers in the image configuration step,
+        # .github/workflows/preview-build.yml (2x) and os/emscripten/Dockerfile too.
         path: /emsdk/upstream/emscripten/cache
         key: 3.1.57-${{ runner.os }}
 

.github/workflows/ci-nightly.yml

@@ -9,27 +9,6 @@ env:
   CTEST_OUTPUT_ON_FAILURE: 1
 
 jobs:
-  linux:
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-        - name: GCC - SDL1.2
-          compiler: gcc
-          cxxcompiler: g++
-          libraries: libsdl1.2-dev
-
-    name: Linux (${{ matrix.name }})
-
-    uses: ./.github/workflows/ci-linux.yml
-    secrets: inherit
-
-    with:
-      compiler: ${{ matrix.compiler }}
-      cxxcompiler: ${{ matrix.cxxcompiler }}
-      libraries: ${{ matrix.libraries }}
-      extra-cmake-parameters:
-
   macos:
     strategy:
       fail-fast: false
@@ -69,7 +48,6 @@ jobs:
   check_annotations:
     name: Check Annotations
     needs:
-    - linux
     - macos
     - mingw
 

.github/workflows/codeql.yml

@@ -87,6 +87,7 @@ jobs:
       with:
         languages: cpp
         config-file: ./.github/codeql/codeql-config.yml
+        trap-caching: false
 
     - name: Build
       run: |

.github/workflows/preview-build.yml

@@ -20,7 +20,8 @@ jobs:
 
     runs-on: ubuntu-latest
     container:
-      # If you change this version, change the number in the cache step too.
+      # If you change this version, change the numbers in the cache step,
+      # .github/workflows/ci-emscripten.yml (2x) and os/emscripten/Dockerfile too.
       image: emscripten/emsdk:3.1.57
 
     steps:
@@ -34,10 +35,19 @@ jobs:
         git config --global --add safe.directory ${GITHUB_WORKSPACE}
         git checkout -b pr${{ github.event.pull_request.number }}
 
+    - name: Update to modern GCC
+      run: |
+        apt-get update
+        apt-get install -y gcc-12 g++-12
+        update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 100
+        update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-12 100
+
     - name: Setup cache
       uses: actions/cache@v4
       with:
         path: /emsdk/upstream/emscripten/cache
+        # If you change this version, change the numbers in the image configuration step,
+        # .github/workflows/ci-emscripten.yml (2x) and os/emscripten/Dockerfile too.
         key: 3.1.57-${{ runner.os }}
 
     - name: Add liblzma support

.github/workflows/rebase-checker.yml

@@ -0,0 +1,19 @@
+name: "Update 'work: needs rebase' label status"
+on:
+  # So that PRs touching the same files as the push are updated
+  push:
+  # So that the `dirtyLabel` is removed if conflicts are resolve
+  # We recommend `pull_request_target` so that github secrets are available.
+  # In `pull_request` we wouldn't be able to change labels of fork PRs
+  pull_request_target:
+    types: [synchronize]
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: check if prs are in need of a rebase
+        uses: eps1lon/actions-label-merge-conflict@v3
+        with:
+          dirtyLabel: "work: needs rebase"
+          repoToken: "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/release-linux.yml

@@ -71,10 +71,10 @@ jobs:
         # dependencies as possible. We do it before anything else is installed,
         # to make sure it doesn't pick up on any of the drivers.
         echo "::group::Install fluidsynth"
-        wget https://github.com/FluidSynth/fluidsynth/archive/v2.3.3.tar.gz
-        tar xf v2.3.3.tar.gz
+        wget https://github.com/FluidSynth/fluidsynth/archive/v2.4.4.tar.gz
+        tar xf v2.4.4.tar.gz
         (
-          cd fluidsynth-2.3.3
+          cd fluidsynth-2.4.4
           mkdir build
           cd build
           cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=/usr

.github/workflows/release-source.yml

@@ -90,10 +90,10 @@ jobs:
 
     - name: Generate metadata
       id: metadata
+      shell: bash
       run: |
         echo "::group::Prepare metadata files"
         cmake -DGENERATE_OTTDREV=1 -P cmake/scripts/FindVersion.cmake
-        ./.github/changelog.sh > .changelog
         TZ='UTC' date +"%Y-%m-%d %H:%M UTC" > .release_date
         cat .ottdrev | cut -f 1 -d$'\t' > .version
 
@@ -103,6 +103,8 @@ jobs:
 
           FOLDER="${{ env.FOLDER_RELEASES }}"
           TRIGGER_TYPE="new-tag"
+
+          python3 ./.github/changelog.py "$(cat .version)" > .changelog
         else
           IS_TAG="false"
 
@@ -124,6 +126,13 @@ jobs:
             FOLDER="${{ env.FOLDER_BRANCHES }}/${BRANCH}"
             TRIGGER_TYPE="new-branch"
           fi
+
+          # For nightlies / branches, use the git log of the last 7 days as changelog.
+          revdate=$(git log -1 --pretty=format:"%ci")
+          last_week=$(date -d "$revdate -7days" +"%Y-%m-%d %H:%M")
+          echo "## Version $(cat .version) - changes since ${last_week}" > .changelog
+          echo "" >> .changelog
+          git log --oneline --after="${last_week}" >> .changelog
         fi
 
         mkdir -p build/bundles

.github/workflows/upload-gog.yml

@@ -62,9 +62,10 @@ jobs:
 
         echo "::group::Unpack OpenGFX"
         unzip opengfx-all.zip
+        tar xf opengfx-*.tar
         echo "::endgroup::"
 
-        rm -f opengfx-all.zip
+        rm -f opengfx-all.zip opengfx-*.tar
 
     - name: Install OpenMSX
       shell: bash

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.17)
 
 if(NOT BINARY_NAME)
     set(BINARY_NAME openttd)
@@ -51,9 +51,6 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS YES)
 # An empty target for the tools
 add_custom_target(tools)
 
-include(Endian)
-add_endian_definition()
-
 include(CompileFlags)
 compile_flags()
 
@@ -135,18 +132,17 @@ endif()
 
 # Breakpad doesn't support emscripten.
 if(NOT EMSCRIPTEN)
-    find_package(unofficial-breakpad)
+    find_package(unofficial-breakpad NO_MODULE)
 endif()
 
 if(NOT OPTION_DEDICATED)
-    if(NOT WIN32)
+    if(WIN32)
+        find_package(Xaudio2)
+    else()
         find_package(Allegro)
         if(NOT APPLE)
             find_package(Freetype)
             find_package(SDL2)
-            if(NOT SDL2_FOUND)
-                find_package(SDL)
-            endif()
             find_package(Fluidsynth)
             if(Freetype_FOUND)
                 find_package(Fontconfig)
@@ -177,7 +173,6 @@ if(MSVC)
 endif()
 
 find_package(SSE)
-find_package(Xaudio2)
 
 find_package(Grfcodec)
 
@@ -187,8 +182,8 @@ check_ipo_supported(RESULT IPO_FOUND)
 show_options()
 
 if(UNIX AND NOT APPLE AND NOT OPTION_DEDICATED)
-    if(NOT SDL_FOUND AND NOT SDL2_FOUND AND NOT ALLEGRO_FOUND)
-        message(FATAL_ERROR "SDL, SDL2 or Allegro is required for this platform")
+    if(NOT SDL2_FOUND AND NOT ALLEGRO_FOUND)
+        message(FATAL_ERROR "SDL2 or Allegro is required for this platform")
     endif()
     if(HARFBUZZ_FOUND AND NOT ICU_i18n_FOUND)
         message(WARNING "HarfBuzz depends on ICU i18n to function; HarfBuzz will be disabled")
@@ -236,8 +231,6 @@ endif()
 include(CTest)
 include(SourceList)
 
-# Needed by rev.cpp
-include_directories(${CMAKE_SOURCE_DIR}/src)
 # Needed by everything that uses Squirrel
 include_directories(${CMAKE_SOURCE_DIR}/src/3rdparty/squirrel/include)
 
@@ -267,6 +260,7 @@ target_precompile_headers(openttd_lib
     src/stdafx.h
     src/core/format.hpp
 )
+set_source_files_properties(src/3rdparty/fmt/format.cc PROPERTIES SKIP_PRECOMPILE_HEADERS ON)
 
 add_subdirectory(${CMAKE_SOURCE_DIR}/bin)
 add_subdirectory(${CMAKE_SOURCE_DIR}/src)
@@ -306,7 +300,6 @@ if(IPO_FOUND)
     set_target_properties(openttd PROPERTIES INTERPROCEDURAL_OPTIMIZATION_RELWITHDEBINFO True)
 endif()
 set_target_properties(openttd PROPERTIES VS_DEBUGGER_WORKING_DIRECTORY "${CMAKE_BINARY_DIR}")
-process_compile_flags()
 
 include(LinkPackage)
 link_package(PNG TARGET PNG::PNG ENCOURAGED)
@@ -320,12 +313,11 @@ if(NOT WIN32 AND NOT EMSCRIPTEN)
 endif()
 
 if(NOT EMSCRIPTEN)
-    link_package(unofficial-breakpad TARGET unofficial::breakpad::libbreakpad_client ENCOURAGED)
+    link_package(unofficial-breakpad TARGET unofficial::breakpad::libbreakpad_client)
 endif()
 
 if(NOT OPTION_DEDICATED)
     link_package(Fluidsynth)
-    link_package(SDL)
     link_package(SDL2 TARGET SDL2::SDL2)
     link_package(Allegro)
     link_package(FREETYPE TARGET Freetype::Freetype)
@@ -398,6 +390,7 @@ if(EMSCRIPTEN)
     target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_SOURCE_DIR}/docs/desync.md@/docs/desync.md")
     target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_SOURCE_DIR}/docs/directory_structure.md@/docs/directory_structure.md")
     target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_SOURCE_DIR}/docs/eints.md@/docs/eints.md")
+    target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_SOURCE_DIR}/docs/fonts.md@/docs/fonts.md")
     target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_SOURCE_DIR}/docs/linkgraph.md@/docs/linkgraph.md")
     target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_SOURCE_DIR}/docs/logging_and_performance_metrics.md@/docs/logging_and_performance_metrics.md")
     target_link_libraries(WASM::WASM INTERFACE "--preload-file ${CMAKE_SOURCE_DIR}/docs/multiplayer.md@/docs/multiplayer.md")

CODINGSTYLE.md

@@ -10,6 +10,8 @@ What is simple to some might appear very complicated to others. Documentation he
 * Function names use [CamelCase](http://www.wikipedia.org/wiki/Camelcase) without underscores.
 * Opening curly bracket **{** for a function starts on the next line.
 * Use Foo() instead of Foo(void).
+* Prefer using "const" for reference and compound parameters when appropriate.
+* If a member function can be a const function, make it so.
 ```c++
 void ThisIsAFunction()
 {
@@ -292,7 +294,6 @@ OpenTTD used to vertically-align inline Doxygen comments as shown above. OpenTTD
 * Put a space before and after binary operators: "a + b", "a == b", "a & b", "a <<= b", etc.. Exceptions are ".", "->" and "[]" (no spaces) and "," (just space after it).
 * Put parenthesis where it improves readability: "*(b++)" instead of "*b++", and "if ((a & b) && c == 2)" instead of "if (a & b && c == 2)".
 * Do not put external declarations in implementation (i.e. cpp) files.
-* Use const where possible.
 * Do not typedef enums and structs.
 * Don't treat non-flags as flags: use "if (char_pointer != nullptr && *char_pointer != '\0')", not "if (char_pointer && *char_pointer)".
 * Use "free(p)" instead of "if (p != nullptr) free(p)". "free(nullptr)" doesn't hurt anyone.

CREDITS.md

@@ -12,6 +12,7 @@
 - Remko Bijker (Rubidium) - Coder and way more (since 0.4.5)
 - Patric Stout (TrueBrain) - NoProgrammer (since 0.3), sys op
 - Tyler Trahan (2TallTyler) - General / Time Lord (since 13)
+- Richard Wheeler (zephyris) - Precision pixel production (since 15)
 
 ### Inactive Developers:
 

Doxyfile.in

@@ -310,7 +310,7 @@ INCLUDE_FILE_PATTERNS  =
 PREDEFINED             = WITH_ZLIB \
                          WITH_LZO \
                          WITH_LIBLZMA \
-                         WITH_SDL \
+                         WITH_SDL2 \
                          WITH_PNG \
                          WITH_FONTCONFIG \
                          WITH_FREETYPE \

bin/ai/CMakeLists.txt

@@ -15,7 +15,6 @@ set(AI_COMPAT_SOURCE_FILES
 	${CMAKE_CURRENT_SOURCE_DIR}/compat_12.nut
 	${CMAKE_CURRENT_SOURCE_DIR}/compat_13.nut
 	${CMAKE_CURRENT_SOURCE_DIR}/compat_14.nut
-	${CMAKE_CURRENT_SOURCE_DIR}/compat_15.nut
 )
 
 foreach(AI_COMPAT_SOURCE_FILE IN LISTS AI_COMPAT_SOURCE_FILES)

bin/ai/compat_0.7.nut

@@ -5,7 +5,8 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("0.7 API compatibility in effect:");
+/* This file contains code to downgrade the API from 1.0 to 0.7. */
+
 AILog.Info(" - AITown::GetLastMonthProduction's behaviour has slightly changed.");
 AILog.Info(" - AISubsidy::GetDestination returns STATION_INVALID for awarded subsidies.");
 AILog.Info(" - AISubsidy::GetSource returns STATION_INVALID for awarded subsidies.");
@@ -95,158 +96,158 @@ AIEngine.IsValidEngine <- function(engine_id)
 	return AIEngine.IsBuildable(engine_id);
 }
 
-AIEngine._GetName <- AIEngine.GetName;
+AIEngine.GetNameCompat0_7 <- AIEngine.GetName;
 AIEngine.GetName <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return null;
-	return AIEngine._GetName(engine_id);
+	return AIEngine.GetNameCompat0_7(engine_id);
 }
 
-AIEngine._GetCargoType <- AIEngine.GetCargoType;
+AIEngine.GetCargoTypeCompat0_7 <- AIEngine.GetCargoType;
 AIEngine.GetCargoType <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return 255;
-	return AIEngine._GetCargoType(engine_id);
+	return AIEngine.GetCargoTypeCompat0_7(engine_id);
 }
 
-AIEngine._CanRefitCargo <- AIEngine.CanRefitCargo;
+AIEngine.CanRefitCargoCompat0_7 <- AIEngine.CanRefitCargo;
 AIEngine.CanRefitCargo <- function(engine_id, cargo_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return false;
-	return AIEngine._CanRefitCargo(engine_id, cargo_id);
+	return AIEngine.CanRefitCargoCompat0_7(engine_id, cargo_id);
 }
 
-AIEngine._CanPullCargo <- AIEngine.CanPullCargo;
+AIEngine.CanPullCargoCompat0_7 <- AIEngine.CanPullCargo;
 AIEngine.CanPullCargo <- function(engine_id, cargo_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return false;
-	return AIEngine._CanPullCargo(engine_id, cargo_id);
+	return AIEngine.CanPullCargoCompat0_7(engine_id, cargo_id);
 }
 
-AIEngine._GetCapacity <- AIEngine.GetCapacity;
+AIEngine.GetCapacityCompat0_7 <- AIEngine.GetCapacity;
 AIEngine.GetCapacity <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetCapacity(engine_id);
+	return AIEngine.GetCapacityCompat0_7(engine_id);
 }
 
-AIEngine._GetReliability <- AIEngine.GetReliability;
+AIEngine.GetReliabilityCompat0_7 <- AIEngine.GetReliability;
 AIEngine.GetReliability <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetReliability(engine_id);
+	return AIEngine.GetReliabilityCompat0_7(engine_id);
 }
 
-AIEngine._GetMaxSpeed <- AIEngine.GetMaxSpeed;
+AIEngine.GetMaxSpeedCompat0_7 <- AIEngine.GetMaxSpeed;
 AIEngine.GetMaxSpeed <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetMaxSpeed(engine_id);
+	return AIEngine.GetMaxSpeedCompat0_7(engine_id);
 }
 
-AIEngine._GetPrice <- AIEngine.GetPrice;
+AIEngine.GetPriceCompat0_7 <- AIEngine.GetPrice;
 AIEngine.GetPrice <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetPrice(engine_id);
+	return AIEngine.GetPriceCompat0_7(engine_id);
 }
 
-AIEngine._GetMaxAge <- AIEngine.GetMaxAge;
+AIEngine.GetMaxAgeCompat0_7 <- AIEngine.GetMaxAge;
 AIEngine.GetMaxAge <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetMaxAge(engine_id);
+	return AIEngine.GetMaxAgeCompat0_7(engine_id);
 }
 
-AIEngine._GetRunningCost <- AIEngine.GetRunningCost;
+AIEngine.GetRunningCostCompat0_7 <- AIEngine.GetRunningCost;
 AIEngine.GetRunningCost <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetRunningCost(engine_id);
+	return AIEngine.GetRunningCostCompat0_7(engine_id);
 }
 
-AIEngine._GetPower <- AIEngine.GetPower;
+AIEngine.GetPowerCompat0_7 <- AIEngine.GetPower;
 AIEngine.GetPower <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetPower(engine_id);
+	return AIEngine.GetPowerCompat0_7(engine_id);
 }
 
-AIEngine._GetWeight <- AIEngine.GetWeight;
+AIEngine.GetWeightCompat0_7 <- AIEngine.GetWeight;
 AIEngine.GetWeight <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetWeight(engine_id);
+	return AIEngine.GetWeightCompat0_7(engine_id);
 }
 
-AIEngine._GetMaxTractiveEffort <- AIEngine.GetMaxTractiveEffort;
+AIEngine.GetMaxTractiveEffortCompat0_7 <- AIEngine.GetMaxTractiveEffort;
 AIEngine.GetMaxTractiveEffort <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetMaxTractiveEffort(engine_id);
+	return AIEngine.GetMaxTractiveEffortCompat0_7(engine_id);
 }
 
-AIEngine._GetDesignDate <- AIEngine.GetDesignDate;
+AIEngine.GetDesignDateCompat0_7 <- AIEngine.GetDesignDate;
 AIEngine.GetDesignDate <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetDesignDate(engine_id);
+	return AIEngine.GetDesignDateCompat0_7(engine_id);
 }
 
-AIEngine._GetVehicleType <- AIEngine.GetVehicleType;
+AIEngine.GetVehicleTypeCompat0_7 <- AIEngine.GetVehicleType;
 AIEngine.GetVehicleType <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return AIVehicle.VT_INVALID;
-	return AIEngine._GetVehicleType(engine_id);
+	return AIEngine.GetVehicleTypeCompat0_7(engine_id);
 }
 
-AIEngine._IsWagon <- AIEngine.IsWagon;
+AIEngine.IsWagonCompat0_7 <- AIEngine.IsWagon;
 AIEngine.IsWagon <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return false;
-	return AIEngine._IsWagon(engine_id);
+	return AIEngine.IsWagonCompat0_7(engine_id);
 }
 
-AIEngine._CanRunOnRail <- AIEngine.CanRunOnRail;
+AIEngine.CanRunOnRailCompat0_7 <- AIEngine.CanRunOnRail;
 AIEngine.CanRunOnRail <- function(engine_id, track_rail_type)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return false;
-	return AIEngine._CanRunOnRail(engine_id, track_rail_type);
+	return AIEngine.CanRunOnRailCompat0_7(engine_id, track_rail_type);
 }
 
-AIEngine._HasPowerOnRail <- AIEngine.HasPowerOnRail;
+AIEngine.HasPowerOnRailCompat0_7 <- AIEngine.HasPowerOnRail;
 AIEngine.HasPowerOnRail <- function(engine_id, track_rail_type)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return false;
-	return AIEngine._HasPowerOnRail(engine_id, track_rail_type);
+	return AIEngine.HasPowerOnRailCompat0_7(engine_id, track_rail_type);
 }
 
-AIEngine._GetRoadType <- AIEngine.GetRoadType;
+AIEngine.GetRoadTypeCompat0_7 <- AIEngine.GetRoadType;
 AIEngine.GetRoadType <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return AIRoad.ROADTYPE_INVALID;
-	return AIEngine._GetRoadType(engine_id);
+	return AIEngine.GetRoadTypeCompat0_7(engine_id);
 }
 
-AIEngine._GetRailType <- AIEngine.GetRailType;
+AIEngine.GetRailTypeCompat0_7 <- AIEngine.GetRailType;
 AIEngine.GetRailType <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return AIRail.RAILTYPE_INVALID;
-	return AIEngine._GetRailType(engine_id);
+	return AIEngine.GetRailTypeCompat0_7(engine_id);
 }
 
-AIEngine._IsArticulated <- AIEngine.IsArticulated;
+AIEngine.IsArticulatedCompat0_7 <- AIEngine.IsArticulated;
 AIEngine.IsArticulated <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return false;
-	return AIEngine._IsArticulated(engine_id);
+	return AIEngine.IsArticulatedCompat0_7(engine_id);
 }
 
-AIEngine._GetPlaneType <- AIEngine.GetPlaneType;
+AIEngine.GetPlaneTypeCompat0_7 <- AIEngine.GetPlaneType;
 AIEngine.GetPlaneType <- function(engine_id)
 {
 	if (!AIEngine.IsBuildable(engine_id)) return -1;
-	return AIEngine._GetPlaneType(engine_id);
+	return AIEngine.GetPlaneTypeCompat0_7(engine_id);
 }
 
 _AIWaypointList <- AIWaypointList;
@@ -256,139 +257,3 @@ class AIWaypointList extends _AIWaypointList {
 		::_AIWaypointList.constructor(AIWaypoint.WAYPOINT_RAIL);
 	}
 }
-
-AIRoad._BuildRoadStation <- AIRoad.BuildRoadStation;
-AIRoad.BuildRoadStation <- function(tile, front, road_veh_type, station_id)
-{
-	if (AIRoad.IsRoadStationTile(tile) && AICompany.IsMine(AITile.GetOwner(tile))) return false;
-
-	return AIRoad._BuildRoadStation(tile, front, road_veh_type, station_id);
-}
-
-AIRoad._BuildDriveThroughRoadStation <- AIRoad.BuildDriveThroughRoadStation;
-AIRoad.BuildDriveThroughRoadStation <- function(tile, front, road_veh_type, station_id)
-{
-	if (AIRoad.IsRoadStationTile(tile) && AICompany.IsMine(AITile.GetOwner(tile))) return false;
-
-	return AIRoad._BuildDriveThroughRoadStation(tile, front, road_veh_type, station_id);
-}
-
-AIBridgeList.HasNext <-
-AIBridgeList_Length.HasNext <-
-AICargoList.HasNext <-
-AICargoList_IndustryAccepting.HasNext <-
-AICargoList_IndustryProducing.HasNext <-
-AIDepotList.HasNext <-
-AIEngineList.HasNext <-
-AIGroupList.HasNext <-
-AIIndustryList.HasNext <-
-AIIndustryList_CargoAccepting.HasNext <-
-AIIndustryList_CargoProducing.HasNext <-
-AIIndustryTypeList.HasNext <-
-AIList.HasNext <-
-AIRailTypeList.HasNext <-
-AISignList.HasNext <-
-AIStationList.HasNext <-
-AIStationList_Vehicle.HasNext <-
-AISubsidyList.HasNext <-
-AITileList.HasNext <-
-AITileList_IndustryAccepting.HasNext <-
-AITileList_IndustryProducing.HasNext <-
-AITileList_StationType.HasNext <-
-AITownList.HasNext <-
-AIVehicleList.HasNext <-
-AIVehicleList_DefaultGroup.HasNext <-
-AIVehicleList_Group.HasNext <-
-AIVehicleList_SharedOrders.HasNext <-
-AIVehicleList_Station.HasNext <-
-AIWaypointList.HasNext <-
-AIWaypointList_Vehicle.HasNext <-
-function()
-{
-	return !this.IsEnd();
-}
-
-AIIndustry._IsCargoAccepted <- AIIndustry.IsCargoAccepted;
-AIIndustry.IsCargoAccepted <- function(industry_id, cargo_id)
-{
-	return AIIndustry._IsCargoAccepted(industry_id, cargo_id) != AIIndustry.CAS_NOT_ACCEPTED;
-}
-
-AIAbstractList <- AIList;
-
-AIList.ChangeItem <- AIList.SetValue;
-
-AIRail.ERR_NONUNIFORM_STATIONS_DISABLED <- 0xFFFF;
-
-AICompany.GetCompanyValue <- function(company)
-{
-	return AICompany.GetQuarterlyCompanyValue(company, AICompany.CURRENT_QUARTER);
-}
-
-AITown.GetLastMonthTransported <- AITown.GetLastMonthSupplied;
-
-AIEvent.AI_ET_INVALID <- AIEvent.ET_INVALID;
-AIEvent.AI_ET_TEST <- AIEvent.ET_TEST;
-AIEvent.AI_ET_SUBSIDY_OFFER <- AIEvent.ET_SUBSIDY_OFFER;
-AIEvent.AI_ET_SUBSIDY_OFFER_EXPIRED <- AIEvent.ET_SUBSIDY_OFFER_EXPIRED;
-AIEvent.AI_ET_SUBSIDY_AWARDED <- AIEvent.ET_SUBSIDY_AWARDED;
-AIEvent.AI_ET_SUBSIDY_EXPIRED <- AIEvent.ET_SUBSIDY_EXPIRED;
-AIEvent.AI_ET_ENGINE_PREVIEW <- AIEvent.ET_ENGINE_PREVIEW;
-AIEvent.AI_ET_COMPANY_NEW <- AIEvent.ET_COMPANY_NEW;
-AIEvent.AI_ET_COMPANY_IN_TROUBLE <- AIEvent.ET_COMPANY_IN_TROUBLE;
-AIEvent.AI_ET_COMPANY_MERGER <- AIEvent.ET_COMPANY_MERGER;
-AIEvent.AI_ET_COMPANY_BANKRUPT <- AIEvent.ET_COMPANY_BANKRUPT;
-AIEvent.AI_ET_VEHICLE_CRASHED <- AIEvent.ET_VEHICLE_CRASHED;
-AIEvent.AI_ET_VEHICLE_LOST <- AIEvent.ET_VEHICLE_LOST;
-AIEvent.AI_ET_VEHICLE_WAITING_IN_DEPOT <- AIEvent.ET_VEHICLE_WAITING_IN_DEPOT;
-AIEvent.AI_ET_VEHICLE_UNPROFITABLE <- AIEvent.ET_VEHICLE_UNPROFITABLE;
-AIEvent.AI_ET_INDUSTRY_OPEN <- AIEvent.ET_INDUSTRY_OPEN;
-AIEvent.AI_ET_INDUSTRY_CLOSE <- AIEvent.ET_INDUSTRY_CLOSE;
-AIEvent.AI_ET_ENGINE_AVAILABLE <- AIEvent.ET_ENGINE_AVAILABLE;
-AIEvent.AI_ET_STATION_FIRST_VEHICLE <- AIEvent.ET_STATION_FIRST_VEHICLE;
-AIEvent.AI_ET_DISASTER_ZEPPELINER_CRASHED <- AIEvent.ET_DISASTER_ZEPPELINER_CRASHED;
-AIEvent.AI_ET_DISASTER_ZEPPELINER_CLEARED <- AIEvent.ET_DISASTER_ZEPPELINER_CLEARED;
-AIOrder.AIOF_NONE <- AIOrder.OF_NONE
-AIOrder.AIOF_NON_STOP_INTERMEDIATE <- AIOrder.OF_NON_STOP_INTERMEDIATE
-AIOrder.AIOF_NON_STOP_DESTINATION <- AIOrder.OF_NON_STOP_DESTINATION
-AIOrder.AIOF_UNLOAD <- AIOrder.OF_UNLOAD
-AIOrder.AIOF_TRANSFER <- AIOrder.OF_TRANSFER
-AIOrder.AIOF_NO_UNLOAD <- AIOrder.OF_NO_UNLOAD
-AIOrder.AIOF_FULL_LOAD <- AIOrder.OF_FULL_LOAD
-AIOrder.AIOF_FULL_LOAD_ANY <- AIOrder.OF_FULL_LOAD_ANY
-AIOrder.AIOF_NO_LOAD <- AIOrder.OF_NO_LOAD
-AIOrder.AIOF_SERVICE_IF_NEEDED <- AIOrder.OF_SERVICE_IF_NEEDED
-AIOrder.AIOF_STOP_IN_DEPOT <- AIOrder.OF_STOP_IN_DEPOT
-AIOrder.AIOF_GOTO_NEAREST_DEPOT <- AIOrder.OF_GOTO_NEAREST_DEPOT
-AIOrder.AIOF_NON_STOP_FLAGS <- AIOrder.OF_NON_STOP_FLAGS
-AIOrder.AIOF_UNLOAD_FLAGS <- AIOrder.OF_UNLOAD_FLAGS
-AIOrder.AIOF_LOAD_FLAGS <- AIOrder.OF_LOAD_FLAGS
-AIOrder.AIOF_DEPOT_FLAGS <- AIOrder.OF_DEPOT_FLAGS
-AIOrder.AIOF_INVALID <- AIOrder.OF_INVALID
-
-/* 1.9 adds a vehicle type parameter. */
-AIBridge._GetName <- AIBridge.GetName;
-AIBridge.GetName <- function(bridge_id)
-{
-	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
-}
-
-/* 1.9 adds parent_group_id to CreateGroup function */
-AIGroup._CreateGroup <- AIGroup.CreateGroup;
-AIGroup.CreateGroup <- function(vehicle_type)
-{
-	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}

bin/ai/compat_1.0.nut

@@ -5,22 +5,22 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.0 API compatibility in effect.");
+/* This file contains code to downgrade the API from 1.1 to 1.0. */
 
-AIRoad._BuildRoadStation <- AIRoad.BuildRoadStation;
+AIRoad.BuildRoadStationCompat1_0 <- AIRoad.BuildRoadStation;
 AIRoad.BuildRoadStation <- function(tile, front, road_veh_type, station_id)
 {
 	if (AIRoad.IsRoadStationTile(tile) && AICompany.IsMine(AITile.GetOwner(tile))) return false;
 
-	return AIRoad._BuildRoadStation(tile, front, road_veh_type, station_id);
+	return AIRoad.BuildRoadStationCompat1_0(tile, front, road_veh_type, station_id);
 }
 
-AIRoad._BuildDriveThroughRoadStation <- AIRoad.BuildDriveThroughRoadStation;
+AIRoad.BuildDriveThroughRoadStationCompat1_0 <- AIRoad.BuildDriveThroughRoadStation;
 AIRoad.BuildDriveThroughRoadStation <- function(tile, front, road_veh_type, station_id)
 {
 	if (AIRoad.IsRoadStationTile(tile) && AICompany.IsMine(AITile.GetOwner(tile))) return false;
 
-	return AIRoad._BuildDriveThroughRoadStation(tile, front, road_veh_type, station_id);
+	return AIRoad.BuildDriveThroughRoadStationCompat1_0(tile, front, road_veh_type, station_id);
 }
 
 AIBridgeList.HasNext <-
@@ -59,10 +59,10 @@ function()
 	return !this.IsEnd();
 }
 
-AIIndustry._IsCargoAccepted <- AIIndustry.IsCargoAccepted;
+AIIndustry.IsCargoAcceptedCompat1_0 <- AIIndustry.IsCargoAccepted;
 AIIndustry.IsCargoAccepted <- function(industry_id, cargo_id)
 {
-	return AIIndustry._IsCargoAccepted(industry_id, cargo_id) != AIIndustry.CAS_NOT_ACCEPTED;
+	return AIIndustry.IsCargoAcceptedCompat1_0(industry_id, cargo_id) != AIIndustry.CAS_NOT_ACCEPTED;
 }
 
 AIAbstractList <- AIList;
@@ -70,77 +70,3 @@ AIAbstractList <- AIList;
 AIList.ChangeItem <- AIList.SetValue;
 
 AIRail.ERR_NONUNIFORM_STATIONS_DISABLED <- 0xFFFF;
-
-AICompany.GetCompanyValue <- function(company)
-{
-	return AICompany.GetQuarterlyCompanyValue(company, AICompany.CURRENT_QUARTER);
-}
-
-AITown.GetLastMonthTransported <- AITown.GetLastMonthSupplied;
-
-AIEvent.AI_ET_INVALID <- AIEvent.ET_INVALID;
-AIEvent.AI_ET_TEST <- AIEvent.ET_TEST;
-AIEvent.AI_ET_SUBSIDY_OFFER <- AIEvent.ET_SUBSIDY_OFFER;
-AIEvent.AI_ET_SUBSIDY_OFFER_EXPIRED <- AIEvent.ET_SUBSIDY_OFFER_EXPIRED;
-AIEvent.AI_ET_SUBSIDY_AWARDED <- AIEvent.ET_SUBSIDY_AWARDED;
-AIEvent.AI_ET_SUBSIDY_EXPIRED <- AIEvent.ET_SUBSIDY_EXPIRED;
-AIEvent.AI_ET_ENGINE_PREVIEW <- AIEvent.ET_ENGINE_PREVIEW;
-AIEvent.AI_ET_COMPANY_NEW <- AIEvent.ET_COMPANY_NEW;
-AIEvent.AI_ET_COMPANY_IN_TROUBLE <- AIEvent.ET_COMPANY_IN_TROUBLE;
-AIEvent.AI_ET_COMPANY_ASK_MERGER <- AIEvent.ET_COMPANY_ASK_MERGER;
-AIEvent.AI_ET_COMPANY_MERGER <- AIEvent.ET_COMPANY_MERGER;
-AIEvent.AI_ET_COMPANY_BANKRUPT <- AIEvent.ET_COMPANY_BANKRUPT;
-AIEvent.AI_ET_VEHICLE_CRASHED <- AIEvent.ET_VEHICLE_CRASHED;
-AIEvent.AI_ET_VEHICLE_LOST <- AIEvent.ET_VEHICLE_LOST;
-AIEvent.AI_ET_VEHICLE_WAITING_IN_DEPOT <- AIEvent.ET_VEHICLE_WAITING_IN_DEPOT;
-AIEvent.AI_ET_VEHICLE_UNPROFITABLE <- AIEvent.ET_VEHICLE_UNPROFITABLE;
-AIEvent.AI_ET_INDUSTRY_OPEN <- AIEvent.ET_INDUSTRY_OPEN;
-AIEvent.AI_ET_INDUSTRY_CLOSE <- AIEvent.ET_INDUSTRY_CLOSE;
-AIEvent.AI_ET_ENGINE_AVAILABLE <- AIEvent.ET_ENGINE_AVAILABLE;
-AIEvent.AI_ET_STATION_FIRST_VEHICLE <- AIEvent.ET_STATION_FIRST_VEHICLE;
-AIEvent.AI_ET_DISASTER_ZEPPELINER_CRASHED <- AIEvent.ET_DISASTER_ZEPPELINER_CRASHED;
-AIEvent.AI_ET_DISASTER_ZEPPELINER_CLEARED <- AIEvent.ET_DISASTER_ZEPPELINER_CLEARED;
-AIOrder.AIOF_NONE <- AIOrder.OF_NONE
-AIOrder.AIOF_NON_STOP_INTERMEDIATE <- AIOrder.OF_NON_STOP_INTERMEDIATE
-AIOrder.AIOF_NON_STOP_DESTINATION <- AIOrder.OF_NON_STOP_DESTINATION
-AIOrder.AIOF_UNLOAD <- AIOrder.OF_UNLOAD
-AIOrder.AIOF_TRANSFER <- AIOrder.OF_TRANSFER
-AIOrder.AIOF_NO_UNLOAD <- AIOrder.OF_NO_UNLOAD
-AIOrder.AIOF_FULL_LOAD <- AIOrder.OF_FULL_LOAD
-AIOrder.AIOF_FULL_LOAD_ANY <- AIOrder.OF_FULL_LOAD_ANY
-AIOrder.AIOF_NO_LOAD <- AIOrder.OF_NO_LOAD
-AIOrder.AIOF_SERVICE_IF_NEEDED <- AIOrder.OF_SERVICE_IF_NEEDED
-AIOrder.AIOF_STOP_IN_DEPOT <- AIOrder.OF_STOP_IN_DEPOT
-AIOrder.AIOF_GOTO_NEAREST_DEPOT <- AIOrder.OF_GOTO_NEAREST_DEPOT
-AIOrder.AIOF_NON_STOP_FLAGS <- AIOrder.OF_NON_STOP_FLAGS
-AIOrder.AIOF_UNLOAD_FLAGS <- AIOrder.OF_UNLOAD_FLAGS
-AIOrder.AIOF_LOAD_FLAGS <- AIOrder.OF_LOAD_FLAGS
-AIOrder.AIOF_DEPOT_FLAGS <- AIOrder.OF_DEPOT_FLAGS
-AIOrder.AIOF_INVALID <- AIOrder.OF_INVALID
-
-/* 1.9 adds a vehicle type parameter. */
-AIBridge._GetName <- AIBridge.GetName;
-AIBridge.GetName <- function(bridge_id)
-{
-	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
-}
-
-/* 1.9 adds parent_group_id to CreateGroup function */
-AIGroup._CreateGroup <- AIGroup.CreateGroup;
-AIGroup.CreateGroup <- function(vehicle_type)
-{
-	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}

bin/ai/compat_1.1.nut

@@ -5,7 +5,7 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.1 API compatibility in effect.");
+/* This file contains code to downgrade the API from 1.2 to 1.1. */
 
 AICompany.GetCompanyValue <- function(company)
 {
@@ -54,30 +54,3 @@ AIOrder.AIOF_UNLOAD_FLAGS <- AIOrder.OF_UNLOAD_FLAGS
 AIOrder.AIOF_LOAD_FLAGS <- AIOrder.OF_LOAD_FLAGS
 AIOrder.AIOF_DEPOT_FLAGS <- AIOrder.OF_DEPOT_FLAGS
 AIOrder.AIOF_INVALID <- AIOrder.OF_INVALID
-
-/* 1.9 adds a vehicle type parameter. */
-AIBridge._GetName <- AIBridge.GetName;
-AIBridge.GetName <- function(bridge_id)
-{
-	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
-}
-
-/* 1.9 adds parent_group_id to CreateGroup function */
-AIGroup._CreateGroup <- AIGroup.CreateGroup;
-AIGroup.CreateGroup <- function(vehicle_type)
-{
-	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}

bin/ai/compat_1.10.nut

@@ -5,17 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.10 API compatibility in effect.");
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.11 to 1.10. */

bin/ai/compat_1.11.nut

@@ -5,17 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.11 API compatibility in effect.");
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 12 to 1.11. */

bin/ai/compat_1.2.nut

@@ -5,31 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.2 API compatibility in effect.");
-
-/* 1.9 adds a vehicle type parameter. */
-AIBridge._GetName <- AIBridge.GetName;
-AIBridge.GetName <- function(bridge_id)
-{
-	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
-}
-
-/* 1.9 adds parent_group_id to CreateGroup function */
-AIGroup._CreateGroup <- AIGroup.CreateGroup;
-AIGroup.CreateGroup <- function(vehicle_type)
-{
-	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.3 to 1.2. */

bin/ai/compat_1.3.nut

@@ -5,31 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.3 API compatibility in effect.");
-
-/* 1.9 adds a vehicle type parameter. */
-AIBridge._GetName <- AIBridge.GetName;
-AIBridge.GetName <- function(bridge_id)
-{
-	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
-}
-
-/* 1.9 adds parent_group_id to CreateGroup function */
-AIGroup._CreateGroup <- AIGroup.CreateGroup;
-AIGroup.CreateGroup <- function(vehicle_type)
-{
-	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.4 to 1.3. */

bin/ai/compat_1.4.nut

@@ -5,31 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.4 API compatibility in effect.");
-
-/* 1.9 adds a vehicle type parameter. */
-AIBridge._GetName <- AIBridge.GetName;
-AIBridge.GetName <- function(bridge_id)
-{
-	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
-}
-
-/* 1.9 adds parent_group_id to CreateGroup function */
-AIGroup._CreateGroup <- AIGroup.CreateGroup;
-AIGroup.CreateGroup <- function(vehicle_type)
-{
-	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.5 to 1.4. */

bin/ai/compat_1.5.nut

@@ -5,31 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.5 API compatibility in effect.");
-
-/* 1.9 adds a vehicle type parameter. */
-AIBridge._GetName <- AIBridge.GetName;
-AIBridge.GetName <- function(bridge_id)
-{
-	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
-}
-
-/* 1.9 adds parent_group_id to CreateGroup function */
-AIGroup._CreateGroup <- AIGroup.CreateGroup;
-AIGroup.CreateGroup <- function(vehicle_type)
-{
-	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.6 to 1.5. */

bin/ai/compat_1.6.nut

@@ -5,31 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.6 API compatibility in effect.");
-
-/* 1.9 adds a vehicle type parameter. */
-AIBridge._GetName <- AIBridge.GetName;
-AIBridge.GetName <- function(bridge_id)
-{
-	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
-}
-
-/* 1.9 adds parent_group_id to CreateGroup function */
-AIGroup._CreateGroup <- AIGroup.CreateGroup;
-AIGroup.CreateGroup <- function(vehicle_type)
-{
-	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.7 to 1.6. */

bin/ai/compat_1.7.nut

@@ -5,31 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.7 API compatibility in effect.");
-
-/* 1.9 adds a vehicle type parameter. */
-AIBridge._GetName <- AIBridge.GetName;
-AIBridge.GetName <- function(bridge_id)
-{
-	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
-}
-
-/* 1.9 adds parent_group_id to CreateGroup function */
-AIGroup._CreateGroup <- AIGroup.CreateGroup;
-AIGroup.CreateGroup <- function(vehicle_type)
-{
-	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.8 to 1.7. */

bin/ai/compat_1.8.nut

@@ -5,31 +5,16 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.8 API compatibility in effect.");
+/* This file contains code to downgrade the API from 1.9 to 1.8. */
 
-/* 1.9 adds a vehicle type parameter. */
-AIBridge._GetName <- AIBridge.GetName;
+AIBridge.GetNameCompat1_8 <- AIBridge.GetName;
 AIBridge.GetName <- function(bridge_id)
 {
-	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
+	return AIBridge.GetNameCompat1_8(bridge_id, AIVehicle.VT_RAIL);
 }
 
-/* 1.9 adds parent_group_id to CreateGroup function */
-AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroupCompat1_8 <- AIGroup.CreateGroup;
 AIGroup.CreateGroup <- function(vehicle_type)
 {
-	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
+	return AIGroup.CreateGroupCompat1_8(vehicle_type, AIGroup.GROUP_INVALID);
 }

bin/ai/compat_1.9.nut

@@ -5,17 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("1.9 API compatibility in effect.");
-
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
-AIRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.10 to 1.9. */

bin/ai/compat_12.nut

@@ -5,15 +5,14 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("12 API compatibility in effect.");
+/* This file contains code to downgrade the API from 13 to 12. */
 
-/* 13 really checks RoadType against RoadType */
-AIRoad._HasRoadType <- AIRoad.HasRoadType;
+AIRoad.HasRoadTypeCompat12 <- AIRoad.HasRoadType;
 AIRoad.HasRoadType <- function(tile, road_type)
 {
 	local list = AIRoadTypeList(AIRoad.GetRoadTramType(road_type));
 	foreach (rt, _ in list) {
-		if (AIRoad._HasRoadType(tile, rt)) {
+		if (AIRoad.HasRoadTypeCompat12(tile, rt)) {
 			return true;
 		}
 	}

bin/ai/compat_13.nut

@@ -5,4 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("13 API compatibility in effect.");
+/* This file contains code to downgrade the API from 14 to 13. */

bin/ai/compat_14.nut

@@ -5,4 +5,34 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-AILog.Info("14 API compatibility in effect.");
+/* This file contains code to downgrade the API from 15 to 14. */
+
+AIBridge.GetBridgeID <- AIBridge.GetBridgeType;
+
+class AICompat14 {
+	function Text(text)
+	{
+		if (typeof text == "string") return text;
+		return null;
+	}
+}
+
+AIBaseStation.SetNameCompat14 <- AIBaseStation.SetName;
+AIBaseStation.SetName <- function(id, name) { return AIBaseStation.SetNameCompat14(id, AICompat14.Text(name)); }
+
+AICompany.SetNameCompat14 <- AICompany.SetName;
+AICompany.SetName <- function(name) { return AICompany.SetNameCompat14(AICompat14.Text(name)); }
+AICompany.SetPresidentNameCompat14 <- AICompany.SetPresidentName;
+AICompany.SetPresidentName <- function(name) { return AICompany.SetPresidentNameCompat14(AICompat14.Text(name)); }
+
+AIGroup.SetNameCompat14 <- AIGroup.SetName;
+AIGroup.SetName <- function(id, name) { return AIGroup.SetNameCompat14(id, AICompat14.Text(name)); }
+
+AISign.BuildSignCompat14 <- AISign.BuildSign;
+AISign.BuildSign <- function(id, name) { return AISign.BuildSignCompat14(id, AICompat14.Text(name)); }
+
+AITown.FoundTownCompat14 <- AITown.FoundTown;
+AITown.FoundTown <- function(tile, size, city, layout, name) { return AITown.FoundTownCompat14(tile, size, city, layout, AICompat14.Text(name)); }
+
+AIVehicle.SetNameCompat14 <- AIVehicle.SetName;
+AIVehicle.SetName <- function(id, name) { return AIVehicle.SetNameCompat14(id, AICompat14.Text(name)); }

bin/game/CMakeLists.txt

@@ -12,7 +12,6 @@ set(GS_COMPAT_SOURCE_FILES
 	${CMAKE_CURRENT_SOURCE_DIR}/compat_12.nut
 	${CMAKE_CURRENT_SOURCE_DIR}/compat_13.nut
 	${CMAKE_CURRENT_SOURCE_DIR}/compat_14.nut
-	${CMAKE_CURRENT_SOURCE_DIR}/compat_15.nut
 )
 
 foreach(GS_COMPAT_SOURCE_FILE IN LISTS GS_COMPAT_SOURCE_FILES)

bin/game/compat_1.10.nut

@@ -5,24 +5,10 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("1.10 API compatibility in effect.");
+/* This file contains code to downgrade the API from 1.11 to 1.10. */
 
-/* 1.11 adds a tile parameter. */
-GSCompany._ChangeBankBalance <- GSCompany.ChangeBankBalance;
+GSCompany.ChangeBankBalanceCompat1_10 <- GSCompany.ChangeBankBalance;
 GSCompany.ChangeBankBalance <- function(company, delta, expenses_type)
 {
-	return GSCompany._ChangeBankBalance(company, delta, expenses_type, GSMap.TILE_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
-GSRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
+	return GSCompany.ChangeBankBalanceCompat1_10(company, delta, expenses_type, GSMap.TILE_INVALID);
 }

bin/game/compat_1.11.nut

@@ -5,17 +5,5 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("1.11 API compatibility in effect.");
+/* This file contains code to downgrade the API from 12 to 1.11. */
 
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
-GSRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}

bin/game/compat_1.2.nut

@@ -5,46 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("1.2 API compatibility in effect.");
-
-GSTown._SetGrowthRate <- GSTown.SetGrowthRate;
-GSTown.SetGrowthRate <- function(town_id, days_between_town_growth)
-{
-	/* Growth rate 0 caused resetting the custom growth rate. While this was undocumented, it was used nevertheless (ofc). */
-	if (days_between_town_growth == 0) days_between_town_growth = GSTown.TOWN_GROWTH_NORMAL;
-	return GSTown._SetGrowthRate(town_id, days_between_town_growth);
-}
-
-/* 1.5 adds a game element reference to the news. */
-GSNews._Create <- GSNews.Create;
-GSNews.Create <- function(type, text, company)
-{
-    return GSNews._Create(type, text, company, GSNews.NR_NONE, 0);
-}
-
-/* 1.9 adds a vehicle type parameter. */
-GSBridge._GetName <- GSBridge.GetName;
-GSBridge.GetName <- function(bridge_id)
-{
-	return GSBridge._GetName(bridge_id, GSVehicle.VT_RAIL);
-}
-
-/* 1.11 adds a tile parameter. */
-GSCompany._ChangeBankBalance <- GSCompany.ChangeBankBalance;
-GSCompany.ChangeBankBalance <- function(company, delta, expenses_type)
-{
-	return GSCompany._ChangeBankBalance(company, delta, expenses_type, GSMap.TILE_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
-GSRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.3 to 1.2. */

bin/game/compat_1.3.nut

@@ -5,46 +5,12 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("1.3 API compatibility in effect.");
+/* This file contains code to downgrade the API from 1.4 to 1.3. */
 
-GSTown._SetGrowthRate <- GSTown.SetGrowthRate;
+GSTown.SetGrowthRateCompat1_3 <- GSTown.SetGrowthRate;
 GSTown.SetGrowthRate <- function(town_id, days_between_town_growth)
 {
 	/* Growth rate 0 caused resetting the custom growth rate. While this was undocumented, it was used nevertheless (ofc). */
 	if (days_between_town_growth == 0) days_between_town_growth = GSTown.TOWN_GROWTH_NORMAL;
-	return GSTown._SetGrowthRate(town_id, days_between_town_growth);
-}
-
-/* 1.5 adds a game element reference to the news. */
-GSNews._Create <- GSNews.Create;
-GSNews.Create <- function(type, text, company)
-{
-    return GSNews._Create(type, text, company, GSNews.NR_NONE, 0);
-}
-
-/* 1.9 adds a vehicle type parameter. */
-GSBridge._GetName <- GSBridge.GetName;
-GSBridge.GetName <- function(bridge_id)
-{
-	return GSBridge._GetName(bridge_id, GSVehicle.VT_RAIL);
-}
-
-/* 1.11 adds a tile parameter. */
-GSCompany._ChangeBankBalance <- GSCompany.ChangeBankBalance;
-GSCompany.ChangeBankBalance <- function(company, delta, expenses_type)
-{
-	return GSCompany._ChangeBankBalance(company, delta, expenses_type, GSMap.TILE_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
-GSRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
+	return GSTown.SetGrowthRateCompat1_3(town_id, days_between_town_growth);
 }

bin/game/compat_1.4.nut

@@ -5,38 +5,10 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("1.4 API compatibility in effect.");
+/* This file contains code to downgrade the API from 1.5 to 1.4 */
 
-/* 1.5 adds a game element reference to the news. */
-GSNews._Create <- GSNews.Create;
+GSNews.CreateCompat1_4 <- GSNews.Create;
 GSNews.Create <- function(type, text, company)
 {
-    return GSNews._Create(type, text, company, GSNews.NR_NONE, 0);
-}
-
-/* 1.9 adds a vehicle type parameter. */
-GSBridge._GetName <- GSBridge.GetName;
-GSBridge.GetName <- function(bridge_id)
-{
-	return GSBridge._GetName(bridge_id, GSVehicle.VT_RAIL);
-}
-
-/* 1.11 adds a tile parameter. */
-GSCompany._ChangeBankBalance <- GSCompany.ChangeBankBalance;
-GSCompany.ChangeBankBalance <- function(company, delta, expenses_type)
-{
-	return GSCompany._ChangeBankBalance(company, delta, expenses_type, GSMap.TILE_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
-GSRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
+    return GSNews.CreateCompat1_4(type, text, company, GSNews.NR_NONE, 0);
 }

bin/game/compat_1.5.nut

@@ -5,31 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("1.5 API compatibility in effect.");
-
-/* 1.9 adds a vehicle type parameter. */
-GSBridge._GetName <- GSBridge.GetName;
-GSBridge.GetName <- function(bridge_id)
-{
-	return GSBridge._GetName(bridge_id, GSVehicle.VT_RAIL);
-}
-
-/* 1.11 adds a tile parameter. */
-GSCompany._ChangeBankBalance <- GSCompany.ChangeBankBalance;
-GSCompany.ChangeBankBalance <- function(company, delta, expenses_type)
-{
-	return GSCompany._ChangeBankBalance(company, delta, expenses_type, GSMap.TILE_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
-GSRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.6 to 1.5. */

bin/game/compat_1.6.nut

@@ -5,31 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("1.6 API compatibility in effect.");
-
-/* 1.9 adds a vehicle type parameter. */
-GSBridge._GetName <- GSBridge.GetName;
-GSBridge.GetName <- function(bridge_id)
-{
-	return GSBridge._GetName(bridge_id, GSVehicle.VT_RAIL);
-}
-
-/* 1.11 adds a tile parameter. */
-GSCompany._ChangeBankBalance <- GSCompany.ChangeBankBalance;
-GSCompany.ChangeBankBalance <- function(company, delta, expenses_type)
-{
-	return GSCompany._ChangeBankBalance(company, delta, expenses_type, GSMap.TILE_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
-GSRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.7 to 1.6. */

bin/game/compat_1.7.nut

@@ -5,31 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("1.7 API compatibility in effect.");
-
-/* 1.9 adds a vehicle type parameter. */
-GSBridge._GetName <- GSBridge.GetName;
-GSBridge.GetName <- function(bridge_id)
-{
-	return GSBridge._GetName(bridge_id, GSVehicle.VT_RAIL);
-}
-
-/* 1.11 adds a tile parameter. */
-GSCompany._ChangeBankBalance <- GSCompany.ChangeBankBalance;
-GSCompany.ChangeBankBalance <- function(company, delta, expenses_type)
-{
-	return GSCompany._ChangeBankBalance(company, delta, expenses_type, GSMap.TILE_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
-GSRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.8 to 1.7. */

bin/game/compat_1.8.nut

@@ -5,31 +5,10 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("1.8 API compatibility in effect.");
+/* This file contains code to downgrade the API from 1.9 to 1.8. */
 
-/* 1.9 adds a vehicle type parameter. */
-GSBridge._GetName <- GSBridge.GetName;
+GSBridge.GetNameCompat1_8 <- GSBridge.GetName;
 GSBridge.GetName <- function(bridge_id)
 {
-	return GSBridge._GetName(bridge_id, GSVehicle.VT_RAIL);
-}
-
-/* 1.11 adds a tile parameter. */
-GSCompany._ChangeBankBalance <- GSCompany.ChangeBankBalance;
-GSCompany.ChangeBankBalance <- function(company, delta, expenses_type)
-{
-	return GSCompany._ChangeBankBalance(company, delta, expenses_type, GSMap.TILE_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
-GSRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
+	return GSBridge.GetNameCompat1_8(bridge_id, GSVehicle.VT_RAIL);
 }

bin/game/compat_1.9.nut

@@ -5,24 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("1.9 API compatibility in effect.");
-
-/* 1.11 adds a tile parameter. */
-GSCompany._ChangeBankBalance <- GSCompany.ChangeBankBalance;
-GSCompany.ChangeBankBalance <- function(company, delta, expenses_type)
-{
-	return GSCompany._ChangeBankBalance(company, delta, expenses_type, GSMap.TILE_INVALID);
-}
-
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
-GSRoad.HasRoadType <- function(tile, road_type)
-{
-	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
-	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
-			return true;
-		}
-	}
-	return false;
-}
+/* This file contains code to downgrade the API from 1.10 to 1.9. */

bin/game/compat_12.nut

@@ -5,15 +5,14 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("12 API compatibility in effect.");
+/* This file contains code to downgrade the API from 13 to 12. */
 
-/* 13 really checks RoadType against RoadType */
-GSRoad._HasRoadType <- GSRoad.HasRoadType;
+GSRoad.HasRoadTypeCompat12 <- GSRoad.HasRoadType;
 GSRoad.HasRoadType <- function(tile, road_type)
 {
 	local list = GSRoadTypeList(GSRoad.GetRoadTramType(road_type));
 	foreach (rt, _ in list) {
-		if (GSRoad._HasRoadType(tile, rt)) {
+		if (GSRoad.HasRoadTypeCompat12(tile, rt)) {
 			return true;
 		}
 	}

bin/game/compat_13.nut

@@ -5,4 +5,4 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("13 API compatibility in effect.");
+/* This file contains code to downgrade the API from 14 to 13. */

bin/game/compat_14.nut

@@ -5,4 +5,76 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-GSLog.Info("14 API compatibility in effect.");
+/* This file contains code to downgrade the API from 15 to 14. */
+
+GSBridge.GetBridgeID <- GSBridge.GetBridgeType;
+
+class GSCompat14 {
+	function Text(text)
+	{
+		if (typeof text == "string") return text;
+		if (typeof text == "instance" && text instanceof GSText) return text;
+		return null;
+	}
+}
+
+GSBaseStation.SetNameCompat14 <- GSBaseStation.SetName;
+GSBaseStation.SetName <- function(id, name) { return GSBaseStation.SetNameCompat14(id, GSCompat14.Text(name)); }
+
+GSCompany.SetNameCompat14 <- GSCompany.SetName;
+GSCompany.SetName <- function(name) { return GSCompany.SetNameCompat14(GSCompat14.Text(name)); }
+GSCompany.SetPresidentNameCompat14 <- GSCompany.SetPresidentName;
+GSCompany.SetPresidentName <- function(name) { return GSCompany.SetPresidentNameCompat14(GSCompat14.Text(name)); }
+
+GSGoal.NewCompat14 <- GSGoal.New;
+GSGoal.New <- function(company, goal, type, dest) { return GSGoal.NewCompat14(company, GSCompat14.Text(goal), type, dest); }
+GSGoal.SetTextCompat14 <- GSGoal.SetText;
+GSGoal.SetText <- function(id, goal) { return GSGoal.SetTextCompat14(id, GSCompat14.Text(goal)); }
+GSGoal.SetProgressCompat14 <- GSGoal.SetProgress;
+GSGoal.SetProgress <- function(id, progress) { return GSGoal.SetProgressCompat14(id, GSCompat14.Text(progress)); }
+GSGoal.QuestionCompat14 <- GSGoal.Question;
+GSGoal.Question <- function(id, company, question, type, buttons) { return GSGoal.QuestionCompat14(id, company, GSCompat14.Text(question), type, buttons); }
+GSGoal.QuestionClientCompat14 <- GSGoal.QuestionClient;
+GSGoal.QuestionClient <- function(id, target, is_client, question, type, buttons) { return GSGoal.QuestionClientCompat14(id, target, is_client, GSCompat14.Text(question), type, buttons); }
+
+GSGroup.SetNameCompat14 <- GSGroup.SetName;
+GSGroup.SetName <- function(id, name) { return GSGroup.SetNameCompat14(id, GSCompat14.Text(name)); }
+
+GSIndustry.SetTextCompat14 <- GSIndustry.SetText;
+GSIndustry.SetText <- function(id, text) { return GSIndustry.SetTextCompat14(id, GSCompat14.Text(text)); }
+GSIndustry.SetProductionLevelCompat14 <- GSIndustry.SetProductionLevel;
+GSIndustry.SetProductionLevel <- function(id, level, news, text) { return GSIndustry.SetProductionLevelCompat14(id, level, news, GSCompat14.Text(text)); }
+
+GSLeagueTable.NewCompat14 <- GSLeagueTable.New;
+GSLeagueTable.New <- function(title, header, footer) { return GSLeagueTable.NewCompat14(GSCompat14.Text(title), GSCompat14.Text(header), GSCompat14.Text(footer)); }
+GSLeagueTable.NewElementCompat14 <- GSLeagueTable.NewElement;
+GSLeagueTable.NewElement <- function(table, rating, company, text, score, type, target) { return GSLeagueTable.NewElementCompat14(table, rating, company, GSCompat14.Text(text), GSCompat14.Text(score), type, target); }
+GSLeagueTable.UpdateElementDataCompat14 <- GSLeagueTable.UpdateElementData;
+GSLeagueTable.UpdateElementData <- function(element, company, text, type, target) { return GSLeagueTable.UpdateElementDataCompat14(element, company, GSCompat14.Text(text), type, target); }
+GSLeagueTable.UpdateElementScoreCompat14 <- GSLeagueTable.UpdateElementScore;
+GSLeagueTable.UpdateElementScore <- function(element, rating, score) { return GSLeagueTable.UpdateElementScoreCompat14(element, rating, GSCompat14.Text(score)); }
+
+GSNews.CreateCompat14 <- GSNews.Create;
+GSNews.Create <- function(type, text, company, ref_type, ref) { return GSNews.CreateCompat14(type, GSCompat14.Text(text), company, ref_type, ref); }
+
+GSSign.BuildSignCompat14 <- GSSign.BuildSign;
+GSSign.BuildSign <- function(id, name) { return GSSign.BuildSignCompat14(id, GSCompat14.Text(name)); }
+
+GSStoryPage.NewCompat14 <- GSStoryPage.New;
+GSStoryPage.New <- function(company, title) { return GSStoryPage.NewCompat14(company, GSCompat14.Text(title)); }
+GSStoryPage.NewElementCompat14 <- GSStoryPage.NewElement;
+GSStoryPage.NewElement <- function(page, type, ref, text) { return GSStoryPage.NewElementCompat14(page, type, ref, GSCompat14.Text(text)); }
+GSStoryPage.UpdateElementCompat14 <- GSStoryPage.UpdateElement;
+GSStoryPage.UpdateElement <- function(id, ref, text) { return GSStoryPage.UpdateElementCompat14(id, ref, GSCompat14.Text(text)); }
+GSStoryPage.SetTitleCompat14 <- GSStoryPage.SetTitle;
+GSStoryPage.SetTitle <- function(page, tile) { return GSStoryPage.SetTitleCompat14(page, GSCompat14.Text(title)); }
+
+GSTown.SetNameCompat14 <- GSTown.SetName;
+GSTown.SetName <- function(id, name) { return GSTown.SetNameCompat14(id, GSCompat14.Text(name)); }
+GSTown.SetTextCompat14 <- GSTown.SetText;
+GSTown.SetText <- function(id, text) { return GSTown.SetTextCompat14(id, GSCompat14.Text(text)); }
+GSTown.FoundTownCompat14 <- GSTown.FoundTown;
+GSTown.FoundTown <- function(tile, size, city, layout, name) { return GSTown.FoundTownCompat14(tile, size, city, layout, GSCompat14.Text(name)); }
+
+GSVehicle.SetNameCompat14 <- GSVehicle.SetName;
+GSVehicle.SetName <- function(id, name) { return GSVehicle.SetNameCompat14(id, GSCompat14.Text(name)); }

bin/game/compat_15.nut

@@ -1,6 +0,0 @@
-/*
- * This file is part of OpenTTD.
- * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
- * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
- */

changelog.md

@@ -1,5 +1,107 @@
 ## 15.x
 
+### 15.0-beta2 (2025-04-13)
+
+- Feature: Snow-covered rocks are now visible (#13627)
+- Feature: Generate more rocks on steep slopes during map generation or heightmap import (#13462)
+- Feature: Prevent towns from upgrading individually-placed houses (#13270)
+- Feature: [Win32] Touchpad two-finger map scrolling (#13172)
+- Feature: NewGRF Badges (#13073)
+- Add: [NewGRF] Add road-/tram-/rail-type variable 0x45 to get mutual road-/tram-/rail-type on same tile (#13934)
+- Add: [Script] Newer Cargo Classes (#13779)
+- Add: Show hyperlink destination tooltips in text window (#13742)
+- Add: [Script] Saving/loading ScriptList (#13556)
+- Add: Press Ctrl to build diagonal canals in game mode (#13432)
+- Add: Sandbox settings to Sandbox Options window (#13268)
+- Add: Setting to allow placing houses manually in-game (#13266)
+- Add: [Script] Event for when a company's president name changes (#13208)
+- Add: Ability to toggle visibility of station signs by facility (#13207)
+- Add: [Script] ScriptEventCompanyRename (#12878)
+- Add: Ukrainian Hryvnia currency (#12877)
+- Add: Convert 32bpp-only sprites to 8bpp when needed (#11602)
+- Change: [Script] Start GS (but don't run it) when generating world in scenario editor (#13961)
+- Change: Make tree placement at world generation look more organic (#13515)
+- Change: [MacOS] Put the icon in a rounded rectangle (#13446)
+- Change: [Script] GetWaypointID to return the StationID of any waypoint (#13407)
+- Change: Draw company manager face jacket after collar (#13390)
+- Change: Don't distinguish between bus and truck stops when removing them (#13384)
+- Change: [Script] Rename BridgeID to BridgeType in the script API (#13352)
+- Change: Add fonts document to help window (#13305)
+- Change: Log changes to sandbox settings (#13267)
+- Change: When player joins network company, use its name instead of number in chat (#13263)
+- Change: [Win32] Draw window title bar according to current Windows light/dark theme (#13196)
+- Change: Restore wider spacers in main toolbars (#12039)
+- Fix: NewGRF Global variables 0D, 0E and 1E refer to wrong GRFFile (#13986)
+- Fix #13980: Allow diagonal selection for road convert (#13983)
+- Fix: Validate raw strings from game-scripts, and strip invalid and control characters (#13976)
+- Fix: Capitalise "Disabled" for the "maximum non-sticky open windows" setting (#13975)
+- Fix: Frame widget with label had incorrect spacing (#13967)
+- Fix: StringFilter included quotes in the search and failed (#13965)
+- Fix #13955: Make graphs respect RTL (#13957)
+- Fix: Numbers were left-aligned for RTL languages in several windows (#13959)
+- Fix: MayHaveRoad claimed rail station tiles had road, so the custom stationspec index would be read as roadtype (#13949)
+- Fix: [Script] Prevent cloning of API instances (#13947)
+- Fix: Reference to the correct section of the README, if a graphics or a sound set is incomplete (#13946)
+- Fix: Draw the bevel around the music track name as inset (#13935)
+- Fix #13923: Padding in music GUI was asymmetric, so it looked different for LTR and RTL languages (#13933)
+- Fix #13928: BuildOilRig did not properly set airport rotation (#13929)
+- Fix: SDL2 application name hint was not effective (#13926)
+- Fix #13921: [Win32] Don't try close an already closed event handle during destruction (#13924)
+- Fix #13921: Don't reject MIDI files with a valid file magic value (#13924)
+- Fix #13912: Multitile buildings break apart in house picker (#13914)
+- Fix #13908: Require double click on order to change stop location (#13913)
+- Fix #13910: Invalidate content of house picker window if language is changed (#13911)
+- Fix: [Script] Reset instance when changing running scripts in scenario editor (#13906)
+- Fix: [Script] Only run the gamescript GameLoop() in-game (#13896)
+- Fix #13893: Reversed all x-axis labels for company related and industry production graphs in wallclock mode (#13894)
+- Fix #13842: Close industry production graph if industry is removed (#13890)
+- Fix #11528: Starting autorail dragging from existing track tiles resulted in adding non-continuous tracks (#13885)
+- Fix: Autoreplace rail/road list only listed buildable types (#13887)
+- Fix: [NewGRF] Display an error, if NewGRF reference out-of-bounds string parameters in gender/plural choices (#13881)
+- Fix #13849: Settings in old saves could be overridden by defaults (#13874)
+- Fix #13562: Removed cost estimation message from money cheat (#13857)
+- Fix: [NewGRF] Plurals and genders did not work in strings with cases or substrings (#13853, #13852)
+- Fix: [NewGRF] String parameter stack and case selection were not processed for control code 0x81 (#13851)
+- Fix #13839: Incorrect colour of first company legend in smallmap window (#13841)
+- Fix: i circumflex width in TrueType small font (#13836)
+- Fix: Don't show owner of non-existent road (#13824)
+- Fix: Error message window timeout doesn't match setting (#13812)
+- Fix #13795: Crash in vehicle list of 32-bit platforms (#13796)
+- Fix: [Script] Company rename event sometimes had the wrong name (#13794)
+- Fix: Improve manager face randomisation (#13776)
+- Fix #13740: [Script] Handle implicit orders for jump orders (#13753)
+- Fix #13749: Default service intervals were not updated when changing timekeeping unit (#13751)
+- Fix #13725: Use proper query strings for changing timetable values (#13737)
+- Fix #11226: Don't draw story page elements that won't be visible (#13736)
+- Fix: More AI than max_no_competitors could start with competitors_interval=0 (#13670)
+- Fix: League table window ignored the minimal size in its widget description (#13629)
+- Fix: Incorrect snow density when making rocks snowy (#13626)
+- Fix: NewGRF vehicles display loading sprites when not actually loading or unloading (#13554)
+- Fix #12925: Prevent cost estimates for settings changes (#13550)
+- Fix: [Script] Report errors happening during 'Load()' (#13537)
+- Fix: [Script] Improve type checking of parameters (#13522)
+- Fix: [Script] Don't set CommandCallback for asynchronous commands (#13501)
+- Fix: Missing error messages with sell- and autoreplace-all commands (#13469)
+- Fix: Too many trees when generating trees at same height (#13460)
+- Fix #12912: Company inaugurated year in wallclock mode was not saved (#13448)
+- Fix: [Script] Wrong return value for failed preconditions Vehicle::CloneVehicle (#13445)
+- Fix #13140: Scale initial industry production estimate by cargo scale (#13427)
+- Fix #13384: Crash when remove bus/truck stop tool used on road waypoints (#13391)
+- Fix #12987: Historical houses now always spawn completed (#13332)
+- Fix: [Win32] Font detection didn't work for locales not supporting code pages (#13306)
+- Fix: Restore ability to disable service interval (#13281)
+- Fix: Hide company settings from console commands (#13269)
+- Fix: Disable service interval widgets for non-owned vehicles (#13260)
+- Fix #13225: Cargo payment graph key toggled wrong data sets (#13226)
+- Fix: Rail station tile flags were not set early enough (#13203)
+- Fix #13199: -f command line parameter does not need a value (#13200)
+- Fix: Missing water region invalidation after flooding a half tile with rail in the highest corner (#13047)
+- Fix: Strip control codes before sorting NewGRF names (#13034)
+- Fix #12968: Added back ability to create unremovable houses (#12989)
+- Remove: Drop support for UCS2/UTF-16 encoded scripts (#13992)
+- Remove: Support for SDL1.2 (#13298)
+
+
 ### 15.0-beta1 (2024-12-24)
 
 - Feature: Town, industry and vehicle window zoom with mouse wheel (#12810, #12809, #12797)

cmake/CompileFlags.cmake

@@ -80,6 +80,10 @@ macro(compile_flags)
 
             # We use 'ABCD' multichar for SaveLoad chunks identifiers
             -Wno-multichar
+
+            # Prevent optimisation supposing enums are in a range specified by the standard
+            # For details, see http://gcc.gnu.org/PR43680 and PR#5246.
+            -fno-strict-enums
         )
 
         # Ninja processes the output so the output from the compiler
@@ -106,10 +110,6 @@ macro(compile_flags)
                 # about its own optimized code in some places.
                 "-fno-strict-overflow"
 
-                # Prevent optimisation supposing enums are in a range specified by the standard
-                # For details, see http://gcc.gnu.org/PR43680
-                "-fno-tree-vrp"
-
                 # -flifetime-dse=2 (default since GCC 6) doesn't play
                 # well with our custom pool item allocator
                 "$<$<BOOL:${LIFETIME_DSE_FOUND}>:-flifetime-dse=1>"

cmake/Endian.cmake

@@ -1,14 +0,0 @@
-# Add the definitions to indicate which endian we are building for.
-#
-# add_endian_definition()
-#
-function(add_endian_definition)
-    include(TestBigEndian)
-    TEST_BIG_ENDIAN(IS_BIG_ENDIAN)
-
-    if(IS_BIG_ENDIAN)
-        add_definitions(-DTTD_ENDIAN=TTD_BIG_ENDIAN)
-    else()
-        add_definitions(-DTTD_ENDIAN=TTD_LITTLE_ENDIAN)
-    endif()
-endfunction()

cmake/FindLZO.cmake

@@ -43,29 +43,8 @@ find_library(LZO_LIBRARY
     PATHS ${PC_LZO_LIBRARY_DIRS}
 )
 
-# With vcpkg, the library path should contain both 'debug' and 'optimized'
-# entries (see target_link_libraries() documentation for more information)
-#
-# NOTE: we only patch up when using vcpkg; the same issue might happen
-# when not using vcpkg, but this is non-trivial to fix, as we have no idea
-# what the paths are. With vcpkg we do. And we only official support vcpkg
-# with Windows.
-#
-# NOTE: this is based on the assumption that the debug file has the same
-# name as the optimized file. This is not always the case, but so far
-# experiences has shown that in those case vcpkg CMake files do the right
-# thing.
-if(VCPKG_TOOLCHAIN AND LZO_LIBRARY AND LZO_LIBRARY MATCHES "${VCPKG_INSTALLED_DIR}")
-    if(LZO_LIBRARY MATCHES "/debug/")
-        set(LZO_LIBRARY_DEBUG ${LZO_LIBRARY})
-        string(REPLACE "/debug/lib/" "/lib/" LZO_LIBRARY_RELEASE ${LZO_LIBRARY})
-    else()
-        set(LZO_LIBRARY_RELEASE ${LZO_LIBRARY})
-        string(REPLACE "/lib/" "/debug/lib/" LZO_LIBRARY_DEBUG ${LZO_LIBRARY})
-    endif()
-    include(SelectLibraryConfigurations)
-    select_library_configurations(LZO)
-endif()
+include(FixVcpkgLibrary)
+FixVcpkgLibrary(LZO)
 
 set(LZO_VERSION ${PC_LZO_VERSION})
 

cmake/FindOgg.cmake

@@ -4,6 +4,9 @@ find_library(Ogg_LIBRARY
     NAMES ogg
 )
 
+include(FixVcpkgLibrary)
+FixVcpkgLibrary(Ogg)
+
 set(Ogg_COMPILE_OPTIONS "" CACHE STRING "Extra compile options of ogg")
 
 set(Ogg_LINK_LIBRARIES "" CACHE STRING "Extra link libraries of ogg")
@@ -33,5 +36,6 @@ if (Ogg_FOUND)
             INTERFACE_LINK_LIBRARIES "${Ogg_LINK_LIBRARIES}"
             INTERFACE_LINK_FLAGS "${Ogg_LINK_FLAGS}"
         )
+        FixVcpkgTarget(Ogg Ogg::ogg)
     endif()
 endif()

cmake/FindOpus.cmake

@@ -4,6 +4,9 @@ find_library(Opus_LIBRARY
     NAMES opus
 )
 
+include(FixVcpkgLibrary)
+FixVcpkgLibrary(Opus)
+
 set(Opus_COMPILE_OPTIONS "" CACHE STRING "Extra compile options of opus")
 
 set(Opus_LINK_LIBRARIES "" CACHE STRING "Extra link libraries of opus")
@@ -33,5 +36,6 @@ if (Opus_FOUND)
             INTERFACE_LINK_LIBRARIES "${Opus_LINK_LIBRARIES}"
             INTERFACE_LINK_FLAGS "${Opus_LINK_FLAGS}"
         )
+        FixVcpkgTarget(Opus Opus::opus)
     endif()
 endif()

cmake/FindOpusFile.cmake

@@ -4,6 +4,9 @@ find_library(OpusFile_LIBRARY
     NAMES opusfile
 )
 
+include(FixVcpkgLibrary)
+FixVcpkgLibrary(OpusFile)
+
 set(OpusFile_COMPILE_OPTIONS "" CACHE STRING "Extra compile options of opusfile")
 
 set(OpusFile_LINK_LIBRARIES "" CACHE STRING "Extra link libraries of opusfile")
@@ -36,5 +39,6 @@ if (OpusFile_FOUND)
             INTERFACE_LINK_LIBRARIES "Ogg::ogg;Opus::opus;${OpusFile_LINK_LIBRARIES}"
             INTERFACE_LINK_FLAGS "${OpusFile_LINK_FLAGS}"
         )
+        FixVcpkgTarget(OpusFile OpusFile::opusfile)
     endif()
 endif()

cmake/FindSSE.cmake

@@ -2,6 +2,7 @@
 # SSE version (SSE 2.0, SSSE 3.0).
 
 include(CheckCXXSourceCompiles)
+set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
 set(CMAKE_REQUIRED_FLAGS "")
 
 if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
@@ -15,3 +16,5 @@ check_cxx_source_compiles("
     int main() { return 0; }"
     SSE_FOUND
 )
+
+set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})

cmake/FindXaudio2.cmake

@@ -1,6 +1,7 @@
 # Autodetect if xaudio2 can be used.
 
 include(CheckCXXSourceCompiles)
+set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
 set(CMAKE_REQUIRED_FLAGS "")
 
 check_cxx_source_compiles("
@@ -17,3 +18,5 @@ check_cxx_source_compiles("
     int main() { printf(\"%s\\\\n\", XAUDIO2_DLL_A); return 0; }"
     XAUDIO2_FOUND
 )
+
+set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})

cmake/FixVcpkgLibrary.cmake

@@ -0,0 +1,40 @@
+macro(FixVcpkgLibrary NAME)
+    # With vcpkg, the library path should contain both 'debug' and 'optimized'
+    # entries (see target_link_libraries() documentation for more information)
+    #
+    # NOTE: we only patch up when using vcpkg; the same issue might happen
+    # when not using vcpkg, but this is non-trivial to fix, as we have no idea
+    # what the paths are. With vcpkg we do. And we only official support vcpkg
+    # with Windows.
+    #
+    # NOTE: this is based on the assumption that the debug file has the same
+    # name as the optimized file. This is not always the case, but so far
+    # experiences has shown that in those case vcpkg CMake files do the right
+    # thing.
+    if(VCPKG_TOOLCHAIN AND ${NAME}_LIBRARY AND ${NAME}_LIBRARY MATCHES "${VCPKG_INSTALLED_DIR}")
+        if(${NAME}_LIBRARY MATCHES "/debug/")
+            set(${NAME}_LIBRARY_DEBUG ${${NAME}_LIBRARY})
+            string(REPLACE "/debug/lib/" "/lib/" ${NAME}_LIBRARY_RELEASE ${${NAME}_LIBRARY})
+        else()
+            set(${NAME}_LIBRARY_RELEASE ${${NAME}_LIBRARY})
+            string(REPLACE "/lib/" "/debug/lib/" ${NAME}_LIBRARY_DEBUG ${${NAME}_LIBRARY})
+        endif()
+        include(SelectLibraryConfigurations)
+        select_library_configurations(${NAME})
+    endif()
+endmacro()
+
+function(FixVcpkgTarget NAME TARGET)
+    if(EXISTS "${${NAME}_LIBRARY_RELEASE}")
+        set_property(TARGET ${TARGET} APPEND PROPERTY
+        IMPORTED_CONFIGURATIONS RELEASE)
+        set_target_properties(${TARGET} PROPERTIES
+        IMPORTED_LOCATION_RELEASE "${${NAME}_LIBRARY_RELEASE}")
+    endif()
+    if(EXISTS "${${NAME}_LIBRARY_DEBUG}")
+        set_property(TARGET ${TARGET} APPEND PROPERTY
+        IMPORTED_CONFIGURATIONS DEBUG)
+        set_target_properties(${TARGET} PROPERTIES
+        IMPORTED_LOCATION_DEBUG "${${NAME}_LIBRARY_DEBUG}")
+    endif()
+endfunction()

cmake/InstallAndPackage.cmake

@@ -62,6 +62,7 @@ install(FILES
                 ${CMAKE_SOURCE_DIR}/docs/desync.md
                 ${CMAKE_SOURCE_DIR}/docs/directory_structure.md
                 ${CMAKE_SOURCE_DIR}/docs/eints.md
+                ${CMAKE_SOURCE_DIR}/docs/fonts.md
                 ${CMAKE_SOURCE_DIR}/docs/game_coordinator.md
                 ${CMAKE_SOURCE_DIR}/docs/linkgraph.md
                 ${CMAKE_SOURCE_DIR}/docs/logging_and_performance_metrics.md

cmake/SourceList.cmake

@@ -46,44 +46,3 @@ endfunction()
 function(add_test_files)
     _add_files_tgt(openttd_test ${ARGV})
 endfunction()
-
-# This function works around an 'issue' with CMake, where
-# set_source_files_properties() only works in the scope of the file. We want
-# to set properties for the source file on a more global level. To solve this,
-# this function records the flags you want, and a macro adds them in the root
-# CMakeLists.txt.
-# See this URL for more information on the issue:
-# http://cmake.3232098.n2.nabble.com/scope-of-set-source-files-properties-td4766111.html
-#
-# set_compile_flags([file1 ...] COMPILE_FLAGS cflag [cflag ...])
-#
-function(set_compile_flags)
-    cmake_parse_arguments(PARAM "" "" "COMPILE_FLAGS" ${ARGN})
-    set(PARAM_FILES "${PARAM_UNPARSED_ARGUMENTS}")
-
-    get_property(SOURCE_PROPERTIES GLOBAL PROPERTY source_properties)
-
-    foreach(FILE IN LISTS PARAM_FILES)
-        list(APPEND SOURCE_PROPERTIES "${CMAKE_CURRENT_SOURCE_DIR}/${FILE}::${PARAM_COMPILE_FLAGS}")
-    endforeach()
-
-    set_property(GLOBAL PROPERTY source_properties "${SOURCE_PROPERTIES}")
-endfunction()
-
-# Call this macro in the same CMakeLists.txt and after add_executable().
-# This makes sure all the COMPILE_FLAGS of set_compile_flags() are set
-# correctly.
-#
-# process_compile_flags()
-#
-function(process_compile_flags)
-    get_property(SOURCE_PROPERTIES GLOBAL PROPERTY source_properties)
-
-    foreach(ENTRY ${SOURCE_PROPERTIES})
-        string(REPLACE "::" ";" ENTRY "${ENTRY}")
-        list(GET ENTRY 0 FILE)
-        list(GET ENTRY 1 PROPERTIES)
-
-        set_source_files_properties(${FILE} PROPERTIES COMPILE_FLAGS ${PROPERTIES})
-    endforeach()
-endfunction()

cmake/scripts/Baseset.cmake

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.17)
 
 #
 # Create a single baseset meta file with the correct translations.

cmake/scripts/CreateGRF.cmake

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.17)
 
 #
 # Create a single GRF file based on sprites/<grfname>.nfo and sprites/*.png

cmake/scripts/Desktop.cmake

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.17)
 
 #
 # Create a desktop file with the correct translations.

cmake/scripts/FindVersion.cmake

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.17)
 
 if(NOT REV_MAJOR)
     set(REV_MAJOR 0)

cmake/scripts/GenerateWidget.cmake

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.17)
 
 #
 # CMake script to automatically generate the enums in script_window.hpp

cmake/scripts/Regression.cmake

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.17)
 
 #
 # Runs a single regressoion test
@@ -87,12 +87,7 @@ set(ERROR NO)
 list(LENGTH REGRESSION_EXPECTED REGRESSION_EXPECTED_LENGTH)
 
 # Compare the output
-foreach(RESULT IN LISTS REGRESSION_RESULT)
-    unset(EXPECTED)
-    if(ARGC LESS REGRESSION_EXPECTED_LENGTH)
-        list(GET REGRESSION_EXPECTED ${ARGC} EXPECTED)
-    endif()
-
+foreach(RESULT EXPECTED IN ZIP_LISTS REGRESSION_RESULT REGRESSION_EXPECTED)
     math(EXPR ARGC "${ARGC} + 1")
 
     if(NOT RESULT STREQUAL EXPECTED)

cmake/scripts/SquirrelExport.cmake

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.17)
 
 if(NOT SCRIPT_API_SOURCE_FILE)
     message(FATAL_ERROR "Script needs SCRIPT_API_SOURCE_FILE defined")
@@ -28,10 +28,10 @@ endmacro()
 macro(dump_class_templates NAME)
     string(REGEX REPLACE "^Script" "" REALNAME ${NAME})
 
-    string(APPEND SQUIRREL_EXPORT "\n	template <> struct Param<${NAME} *> { static inline ${NAME} *Get(HSQUIRRELVM vm, int index) { SQUserPointer instance; sq_getinstanceup(vm, index, &instance, nullptr); return  (${NAME} *)instance; } };")
-    string(APPEND SQUIRREL_EXPORT "\n	template <> struct Param<${NAME} &> { static inline ${NAME} &Get(HSQUIRRELVM vm, int index) { SQUserPointer instance; sq_getinstanceup(vm, index, &instance, nullptr); return *(${NAME} *)instance; } };")
-    string(APPEND SQUIRREL_EXPORT "\n	template <> struct Param<const ${NAME} *> { static inline const ${NAME} *Get(HSQUIRRELVM vm, int index) { SQUserPointer instance; sq_getinstanceup(vm, index, &instance, nullptr); return  (${NAME} *)instance; } };")
-    string(APPEND SQUIRREL_EXPORT "\n	template <> struct Param<const ${NAME} &> { static inline const ${NAME} &Get(HSQUIRRELVM vm, int index) { SQUserPointer instance; sq_getinstanceup(vm, index, &instance, nullptr); return *(${NAME} *)instance; } };")
+    string(APPEND SQUIRREL_EXPORT "\n	template <> struct Param<${NAME} *> { static inline ${NAME} *Get(HSQUIRRELVM vm, int index) { return  static_cast<${NAME} *>(Squirrel::GetRealInstance(vm, index, \"${REALNAME}\")); } };")
+    string(APPEND SQUIRREL_EXPORT "\n	template <> struct Param<${NAME} &> { static inline ${NAME} &Get(HSQUIRRELVM vm, int index) { return *static_cast<${NAME} *>(Squirrel::GetRealInstance(vm, index, \"${REALNAME}\")); } };")
+    string(APPEND SQUIRREL_EXPORT "\n	template <> struct Param<const ${NAME} *> { static inline const ${NAME} *Get(HSQUIRRELVM vm, int index) { return  static_cast<${NAME} *>(Squirrel::GetRealInstance(vm, index, \"${REALNAME}\")); } };")
+    string(APPEND SQUIRREL_EXPORT "\n	template <> struct Param<const ${NAME} &> { static inline const ${NAME} &Get(HSQUIRRELVM vm, int index) { return *static_cast<${NAME} *>(Squirrel::GetRealInstance(vm, index, \"${REALNAME}\")); } };")
     if("${NAME}" STREQUAL "ScriptEvent")
         string(APPEND SQUIRREL_EXPORT "\n	template <> struct Return<${NAME} *> { static inline int Set(HSQUIRRELVM vm, ${NAME} *res) { if (res == nullptr) { sq_pushnull(vm); return 1; } Squirrel::CreateClassInstanceVM(vm, \"${REALNAME}\", res, nullptr, DefSQDestructorCallback<${NAME}>, true); return 1; } };")
     elseif("${NAME}" STREQUAL "ScriptText")
@@ -44,7 +44,10 @@ macro(dump_class_templates NAME)
         string(APPEND SQUIRREL_EXPORT "\n			if (sq_gettype(vm, index) == OT_STRING) {")
         string(APPEND SQUIRREL_EXPORT "\n				return new RawText(Param<const std::string &>::Get(vm, index));")
         string(APPEND SQUIRREL_EXPORT "\n			}")
-        string(APPEND SQUIRREL_EXPORT "\n			return nullptr;")
+        string(APPEND SQUIRREL_EXPORT "\n			if (sq_gettype(vm, index) == OT_NULL) {")
+        string(APPEND SQUIRREL_EXPORT "\n				return nullptr;")
+        string(APPEND SQUIRREL_EXPORT "\n			}")
+        string(APPEND SQUIRREL_EXPORT "\n			throw sq_throwerror(vm, fmt::format(\"parameter {} has an invalid type ; expected: 'Text'\", index - 1));")
         string(APPEND SQUIRREL_EXPORT "\n		}")
         string(APPEND SQUIRREL_EXPORT "\n	};")
     else()
@@ -307,11 +310,6 @@ foreach(LINE IN LISTS SOURCE_LINES)
                     string(APPEND SQUIRREL_EXPORT "\nnamespace SQConvert {")
                     set(NAMESPACE_OPENED TRUE)
                 endif()
-                string(APPEND SQUIRREL_EXPORT "\n	/* Allow enums to be used as Squirrel parameters */")
-                foreach(ENUM IN LISTS ENUMS)
-                    string(APPEND SQUIRREL_EXPORT "\n	template <> struct Param<${ENUM}> { static inline ${ENUM} Get(HSQUIRRELVM vm, int index) { SQInteger tmp; sq_getinteger(vm, index, &tmp); return (${ENUM})tmp; } };")
-                    string(APPEND SQUIRREL_EXPORT "\n	template <> struct Return<${ENUM}> { static inline int Set(HSQUIRRELVM vm, ${ENUM} res) { sq_pushinteger(vm, res); return 1; } };")
-                endforeach()
             endif()
 
             # Then check whether we have structs/classes to print
@@ -342,14 +340,14 @@ foreach(LINE IN LISTS SOURCE_LINES)
         endif()
 
         string(APPEND SQUIRREL_EXPORT "\n")
-        string(APPEND SQUIRREL_EXPORT "\ntemplate <> const char *GetClassName<${CLS}, ScriptType::${APIUC}>() { return \"${API_CLS}\"; }")
+        string(APPEND SQUIRREL_EXPORT "\ntemplate <> SQInteger PushClassName<${CLS}, ScriptType::${APIUC}>(HSQUIRRELVM vm) { sq_pushstring(vm, \"${API_CLS}\", -1); return 1; }")
         string(APPEND SQUIRREL_EXPORT "\n")
 
         # Then do the registration functions of the class.
         string(APPEND SQUIRREL_EXPORT "\nvoid SQ${API_CLS}_Register(Squirrel *engine)")
         string(APPEND SQUIRREL_EXPORT "\n{")
         string(APPEND SQUIRREL_EXPORT "\n	DefSQClass<${CLS}, ScriptType::${APIUC}> SQ${API_CLS}(\"${API_CLS}\");")
-        if("${SUPER_CLS}" STREQUAL "Text" OR "${SUPER_CLS}" STREQUAL "ScriptObject" OR "${SUPER_CLS}" STREQUAL "AIAbstractiveList::Valuator")
+        if("${SUPER_CLS}" STREQUAL "Text")
             string(APPEND SQUIRREL_EXPORT "\n	SQ${API_CLS}.PreRegister(engine);")
         else()
             string(APPEND SQUIRREL_EXPORT "\n	SQ${API_CLS}.PreRegister(engine, \"${API_SUPER_CLS}\");")
@@ -574,6 +572,10 @@ foreach(LINE IN LISTS SOURCE_LINES)
         list(APPEND CONST_VALUES "${CMAKE_MATCH_1}")
         continue()
     endif()
+    if("${LINE}" MATCHES "^[ 	]*static constexpr [^ ]+ ([^ ]+) = -?\\(?[^ ]*\\)?[^ ]+;")
+        list(APPEND CONST_VALUES "${CMAKE_MATCH_1}")
+        continue()
+    endif()
 
     # Add a method to the list
     if("${LINE}" MATCHES "^.*\\(.*\\).*$")

cmake/scripts/SquirrelIncludes.cmake

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.16)
+cmake_minimum_required(VERSION 3.17)
 
 if(NOT INCLUDES_SOURCE_FILE)
     message(FATAL_ERROR "Script needs INCLUDES_SOURCE_FILE defined")

docs/admin_network.md

@@ -223,7 +223,7 @@ Last updated:    2024-03-26
 
 ## 5.1) Receiving chat
 
-  Register `ADMIN_UPDATE_CHAT` at `ADMIN_FREQUENCY_AUTOMATIC` to receive chat.
+  Register `ADMIN_UPDATE_CHAT` at `AdminUpdateFrequency::Automatic` to receive chat.
   The application will be able to receive all chat the server can see.
 
   The configuration option `network.server_admin_chat` specifies whether

docs/fonts.md

@@ -0,0 +1,62 @@
+# Fonts for OpenTTD
+
+OpenTTD uses four different fonts:
+- a medium font (used for most texts in the game)
+- a small font (used for the smallmap legend etc)
+- a large font (used for news headlines etc)
+- a monospace font (used for text files such as NewGRF readmes).
+
+You can use the following types of fonts with OpenTTD:
+
+## OpenTTD's default fonts
+
+These fonts are OpenTTD Sans (small and medium), OpenTTD Serif (large) and OpenTTD Mono (monospace). They are distributed as part of OpenTTD since version 14. The font files are included in the baseset directory of OpenTTD.
+
+These fonts are active by default and support the Latin, Greek and Cyrillic scripts at present.
+
+## Traditional sprite fonts
+
+These are the classic bitmap fonts included as part of the base graphics. They support only the Latin script.
+
+These fonts can be activated in the Graphics section of the Game options window, by enabling the option "Use traditional sprite fonts".
+
+## System fonts
+
+These are fonts installed on your computer. OpenTTD tries to automatically detect and activate a suitable system font in case you have selected a language not supported by the default fonts. However, if this fails, you may have to set a font manually.
+
+There are two ways to manually set system fonts, using the `font` console command or editing the openttd.cfg file.
+
+### Using the console
+
+Open the console. On most keyboards, this is done by pressing the key to the left of 1 (\` on most English keyboards).
+
+The command to change a font is `font [medium|small|large|mono] [<font name>] [<size>]`.
+For example, `font large "Times New Roman" 16`.
+
+The font name should be enclosed in double quotes if it contains spaces. Note that the size provided is multiplied by the interface scaling factor.
+
+You can reset the font and size to the defaults by providing the font name "" (a blank font name). This will result in the OpenTTD default font or sprite font (depending on the setting) if you are using a supported language, or a default font determined by your OS otherwise.
+
+You can view the current font configuration by running the command `font` without any arguments.
+
+For more information, run the command `help font`.
+
+### Using openttd.cfg
+
+In openttd.cfg, the following settings under the `[misc]` section determine the font (this is just an example):
+```
+small_font =
+medium_font = Arial Bold
+large_font = Times New Roman
+mono_font =
+small_size = 6
+medium_size = 10
+large_size = 18
+mono_size = 10
+```
+
+If these settings are not present, you can add them under the `[misc]` section.
+
+If any font names are left blank, the default font and size are used.
+
+If you cannot find the openttd.cfg file, see [the directory structure guide](./directory_structure.md).

docs/landscape.html

@@ -64,7 +64,7 @@
       <tr bgcolor="#CCCCCC"><td colspan="2">Only meaningful in tropic climate. It contains the definition of the available zones</td></tr>
       <tr><td style="width: 5em;"><tt>00</tt></td><td>normal</td></tr>
       <tr><td><tt>01</tt></td><td>desert</td></tr>
-      <tr><td><tt>02</tt></td><td>rain forest</td></tr>
+      <tr><td><tt>02</tt></td><td>rainforest</td></tr>
      </table>
      In any other climate these 2 bits are theoretically free of use, however using them does not seem useful.
     </li>
@@ -721,7 +721,8 @@
         </ul>
        </li>
       </ul>
-     <li>m3 bits 6..5 : free</li>
+     <li>m3 bit 6 : free</li>
+     <li>m3 bit 5 : The house is protected from the town upgrading it</li>
      <li>m3 bits 4..0 : triggers activated <a href="#newhouses">(newhouses)</a></li>
      <li>m4 : free</li>
      <li>m5 : see m3 bit 7</li>

docs/landscape_grid.html

@@ -156,7 +156,7 @@ the array so you can quickly see what is used and what is not.
       <td class="caption">finished house</td>
       <td class="bits" rowspan=2><span class="used" title="House random bits">XXXX XXXX</span></td>
       <td class="bits" rowspan=2><span class="pool" title="Town index on pool">XXXX XXXX XXXX XXXX</span></td>
-      <td class="bits"><span class="used" title="House is complete/in construction (see m5)">1</span><span class="free">OO</span><span class="usable" title="Activated triggers (bits 2..4 don't have a meaning)">X XX</span><span class="used" title="Activated triggers (bits 2..4 don't have a meaning)">XX</span></td>
+      <td class="bits"><span class="used" title="House is complete/in construction (see m5)">1</span><span class="free">O</span><span class="used" title="The house is protected from the town upgrading it.">X</span><span class="usable" title="Activated triggers (bits 2..4 don't have a meaning)">X XX</span><span class="used" title="Activated triggers (bits 2..4 don't have a meaning)">XX</span></td>
       <td class="bits" rowspan=2><span class="free">OOOO OOOO</span></td>
       <td class="bits"><span class="used" title="Age in years, clamped at 255">XXXX XXXX</span></td>
       <td class="bits" rowspan=2><span class="abuse" title="Newhouses activated: periodic processing time remaining; if not, lift position for houses 04 and 05">XXXX XX</span><span class="used" title="Animated tile state">XX</span></td>
@@ -165,7 +165,7 @@ the array so you can quickly see what is used and what is not.
     </tr>
     <tr>
       <td class="caption">house under construction</td>
-      <td class="bits"><span class="used" title="House is complete/in construction (see m5)">O</span><span class="used" title="House type (m4 + m3[6])">X</span><span class="free">O</span><span class="usable" title="Activated triggers (bits 2..4 don't have a meaning)">X XX</span><span class="used" title="Activated triggers (bits 2..4 don't have a meaning)">XX</span></td>
+      <td class="bits"><span class="used" title="House is complete/in construction (see m5)">O</span><span class="used" title="House type (m4 + m3[6])">X</span><span class="used" title="The house is protected from the town upgrading it.">X</span><span class="usable" title="Activated triggers (bits 2..4 don't have a meaning)">X XX</span><span class="used" title="Activated triggers (bits 2..4 don't have a meaning)">XX</span></td>
       <td class="bits"><span class="free">OOO</span><span class="used" title="Construction stage">X X</span><span class="used" title="Construction counter">XXX</span></td>
     </tr>
     <tr>

docs/releasing_openttd.md

@@ -8,10 +8,10 @@ This guide is for OpenTTD developers/maintainers, to release a new version of Op
 
 * If this is an RC1 (first Release Candidate) build, create a new branch `release/nn` where `nn` is the major version number, then apply changes similar to [PR#9573](https://github.com/OpenTTD/OpenTTD/pull/9573). You also need to forwardport the changelog, as in [PR#10113](https://github.com/OpenTTD/OpenTTD/pull/10113).
   * Update the version in `CMakeLists.txt` in the master branch, heading for the next major release, e.g. from 14.0 to 15.0.
-  * Add a new (empty) AI compatibility script in `bin/ai/`
-  * Add the new version to CheckAPIVersion in `src/ai/ai_info.cpp` and `src/game/game_info.cpp`
-  * Add the new version to `src/script/api/ai_changelog.hpp` and `src/script/api/game_changelog.hpp`
-  * Update the version of regression in `bin/ai/regression/regression_info.nut`
+  * Add the new version to `ApiVersions` in `src/ai/ai_info.hpp` and `src/game/game_info.hpp`.
+  * Add the new version to `src/script/api/ai_changelog.hpp` and `src/script/api/game_changelog.hpp`.
+  * Update the version of regression in `bin/ai/regression/regression_info.nut`.
+  * Add a new (empty) AI compatibility script in `bin/ai/` and `bin/game/` for the version of the branch.
   * Add a note to `src/saveload/saveload.h` about which savegame version is used in the branch.
 
 * If this is a later RC or release build and the release branch already exists, you'll need to backport fixes and language from master to this branch, which were merged after the branch diverged from master. You can use these two helper scripts: https://github.com/OpenTTD/scripts/tree/main/backport

media/baseset/OpenTTD-font.md

@@ -1,6 +1,6 @@
 # OpenTTD TrueType font
 
-The OpenTTD TrueType font was created by Zephyris and is maintained on [Github](https://github.com/zephyris/openttd-ttf).
+The OpenTTD TrueType font was created by Zephyris and is maintained on [Github](https://github.com/OpenTTD/OpenTTD-TTF).
 It is licensed under GPL-2.0.
 
-The currently included files correspond to release v0.6.
+The currently included files correspond to release v0.7.

media/baseset/openttd.grf.hash

@@ -1 +1 @@
-8bc3926cb50e19747de498357417d973
+019dba4830a64ee4345d3d647633e1da

media/baseset/openttd/CMakeLists.txt

@@ -18,6 +18,7 @@ if(GRFCODEC_FOUND)
                          ${CMAKE_CURRENT_SOURCE_DIR}/oneway.nfo
                          ${CMAKE_CURRENT_SOURCE_DIR}/openttd.nfo
                          ${CMAKE_CURRENT_SOURCE_DIR}/openttdgui.nfo
+                         ${CMAKE_CURRENT_SOURCE_DIR}/overlay_rocks.nfo
                          ${CMAKE_CURRENT_SOURCE_DIR}/palette.nfo
                          ${CMAKE_CURRENT_SOURCE_DIR}/roadstops.nfo
                          ${CMAKE_CURRENT_SOURCE_DIR}/road_waypoints.nfo
@@ -42,6 +43,11 @@ if(GRFCODEC_FOUND)
                          ${CMAKE_CURRENT_SOURCE_DIR}/openttdgui_convert_road.png
                          ${CMAKE_CURRENT_SOURCE_DIR}/openttdgui_convert_tram.png
                          ${CMAKE_CURRENT_SOURCE_DIR}/openttdgui_group_livery.png
+                         ${CMAKE_CURRENT_SOURCE_DIR}/overlay_rocks.png
+                         ${CMAKE_CURRENT_SOURCE_DIR}/overlay_snowy_rocks_1.png
+                         ${CMAKE_CURRENT_SOURCE_DIR}/overlay_snowy_rocks_2.png
+                         ${CMAKE_CURRENT_SOURCE_DIR}/overlay_snowy_rocks_3.png
+                         ${CMAKE_CURRENT_SOURCE_DIR}/overlay_snowy_rocks_4.png
                          ${CMAKE_CURRENT_SOURCE_DIR}/roadstops.png
                          ${CMAKE_CURRENT_SOURCE_DIR}/road_waypoints.png
                          ${CMAKE_CURRENT_SOURCE_DIR}/signals.png

media/baseset/openttd/openttd.nfo

@@ -99,3 +99,4 @@
 #include "tunnel_portals.nfo"
 #include "palette.nfo"
 #include "road_waypoints.nfo"
+#include "overlay_rocks.nfo"

media/baseset/openttd/overlay_rocks.nfo

@@ -0,0 +1,112 @@
+// This file is part of OpenTTD.
+// OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+// OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+//
+   -1 * 0	 0C "Overlay rocks"
+   -1 * 3	 05 1A 5F
+
+// Plain overlay rocks (unused...)
+   -1 sprites/overlay_rocks.png 8bpp    1 1  64  31 -31    0 normal
+   -1 sprites/overlay_rocks.png 8bpp   81 1  64  31 -31    0 normal
+   -1 sprites/overlay_rocks.png 8bpp  161 1  64  23 -31    0 normal
+   -1 sprites/overlay_rocks.png 8bpp  241 1  64  23 -31    0 normal
+   -1 sprites/overlay_rocks.png 8bpp  321 1  64  31 -31    0 normal
+   -1 sprites/overlay_rocks.png 8bpp  401 1  64  31 -31    0 normal
+   -1 sprites/overlay_rocks.png 8bpp  481 1  64  23 -31    0 normal
+   -1 sprites/overlay_rocks.png 8bpp  561 1  64  23 -31    0 normal
+   -1 sprites/overlay_rocks.png 8bpp  641 1  64  39 -31   -8 normal
+   -1 sprites/overlay_rocks.png 8bpp  721 1  64  39 -31   -8 normal
+   -1 sprites/overlay_rocks.png 8bpp  801 1  64  31 -31   -8 normal
+   -1 sprites/overlay_rocks.png 8bpp  881 1  64  31 -31   -8 normal
+   -1 sprites/overlay_rocks.png 8bpp  961 1  64  39 -31   -8 normal
+   -1 sprites/overlay_rocks.png 8bpp 1041 1  64  39 -31   -8 normal
+   -1 sprites/overlay_rocks.png 8bpp 1121 1  64  31 -31   -8 normal
+   -1 sprites/overlay_rocks.png 8bpp 1201 1  64  47 -31  -16 normal
+   -1 sprites/overlay_rocks.png 8bpp 1281 1  64  15 -31    0 normal
+   -1 sprites/overlay_rocks.png 8bpp 1361 1  64  31 -31   -8 normal
+   -1 sprites/overlay_rocks.png 8bpp 1441 1  64  31 -31   -8 normal
+
+// Snowy rocks level 0
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp    1 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp   81 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  161 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  241 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  321 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  401 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  481 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  561 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  641 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  721 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  801 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  881 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp  961 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp 1041 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp 1121 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp 1201 1  64  47 -31  -16 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp 1281 1  64  15 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp 1361 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_1.png 8bpp 1441 1  64  31 -31   -8 normal
+
+// Snowy rocks level 1
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp    1 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp   81 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  161 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  241 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  321 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  401 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  481 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  561 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  641 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  721 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  801 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  881 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp  961 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp 1041 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp 1121 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp 1201 1  64  47 -31  -16 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp 1281 1  64  15 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp 1361 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_2.png 8bpp 1441 1  64  31 -31   -8 normal
+
+// Snowy rocks level 2
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp    1 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp   81 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  161 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  241 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  321 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  401 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  481 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  561 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  641 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  721 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  801 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  881 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp  961 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp 1041 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp 1121 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp 1201 1  64  47 -31  -16 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp 1281 1  64  15 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp 1361 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_3.png 8bpp 1441 1  64  31 -31   -8 normal
+
+// Snowy rocks level 4
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp    1 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp   81 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  161 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  241 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  321 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  401 1  64  31 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  481 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  561 1  64  23 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  641 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  721 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  801 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  881 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp  961 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp 1041 1  64  39 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp 1121 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp 1201 1  64  47 -31  -16 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp 1281 1  64  15 -31    0 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp 1361 1  64  31 -31   -8 normal
+   -1 sprites/overlay_snowy_rocks_4.png 8bpp 1441 1  64  31 -31   -8 normal

os/emscripten/Dockerfile

@@ -1,3 +1,12 @@
+# If you change this version, change the numbers in .github/workflows/ci-emscripten.yml (2x)
+# and .github/workflows/preview-build.yml (2x) too.
 FROM emscripten/emsdk:3.1.57
 
+RUN apt-get update \
+    && apt-get install -y gcc-12 g++-12 \
+    && update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 100 \
+    && update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-12 100 \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
 COPY ports/liblzma.py /emsdk/upstream/emscripten/tools/ports/contrib/liblzma.py

os/emscripten/cmake/FindLibLZMA.cmake

@@ -1,6 +1,7 @@
 # LibLZMA is a custom addition to the emscripten SDK, so it is possible
 # someone patched their SDK. Test out if the SDK supports LibLZMA.
 include(CheckCXXSourceCompiles)
+set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
 set(CMAKE_REQUIRED_FLAGS "--use-port=contrib.liblzma")
 
 check_cxx_source_compiles("
@@ -18,3 +19,5 @@ if (LIBLZMA_FOUND)
 else()
         message(WARNING "You are using an emscripten SDK without LibLZMA support. Many savegames won't be able to load in OpenTTD. Please copy liblzma.py to your ports/contrib folder in your local emsdk installation.")
 endif()
+
+set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})

regression/regression/main.nut

@@ -265,15 +265,15 @@ function Regression::Bridge()
 	print("  Valid Bridges:        " + j);
 
 	print("  IsBridgeTile():       " + AIBridge.IsBridgeTile(33160));
-	print("  GetBridgeID():        " + AIBridge.GetBridgeID(33160));
+	print("  GetBridgeType():      " + AIBridge.GetBridgeType(33160));
 	print("  RemoveBridge():       " + AIBridge.RemoveBridge(33155));
 	print("  GetLastErrorString(): " + AIError.GetLastErrorString());
 	print("  GetOtherBridgeEnd():  " + AIBridge.GetOtherBridgeEnd(33160));
 	print("  BuildBridge():        " + AIBridge.BuildBridge(AIVehicle.VT_ROAD, 5, 33160, 33155));
 	print("  IsBridgeTile():       " + AIBridge.IsBridgeTile(33160));
-	print("  GetBridgeID():        " + AIBridge.GetBridgeID(33160));
+	print("  GetBridgeType():      " + AIBridge.GetBridgeType(33160));
 	print("  IsBridgeTile():       " + AIBridge.IsBridgeTile(33155));
-	print("  GetBridgeID():        " + AIBridge.GetBridgeID(33155));
+	print("  GetBridgeType():      " + AIBridge.GetBridgeType(33155));
 	print("  GetOtherBridgeEnd():  " + AIBridge.GetOtherBridgeEnd(33160));
 	print("  BuildBridge():        " + AIBridge.BuildBridge(AIVehicle.VT_ROAD, 5, 33160, 33155));
 	print("  GetLastErrorString(): " + AIError.GetLastErrorString());
@@ -2035,6 +2035,20 @@ function Regression::Start()
 				print("      VehicleID:         " + c.GetVehicleID());
 			} break;
 
+			case AIEvent.ET_COMPANY_RENAMED: {
+				local c = AIEventCompanyRenamed.Convert(e);
+				print("      EventName:         CompanyRenamed");
+				print("      CompanyID:         " + c.GetCompanyID());
+				print("      CompanyName:       " + c.GetNewName());
+			} break;
+
+			case AIEvent.ET_PRESIDENT_RENAMED: {
+				local c = AIEventPresidentRenamed.Convert(e);
+				print("      EventName:         PresidentRenamed");
+				print("      CompanyID:         " + c.GetCompanyID());
+				print("      PresidentName:     " + c.GetNewName());
+			} break;
+
 			default:
 				print("      Unknown Event");
 				break;

regression/regression/result.txt

@@ -1051,15 +1051,15 @@ ERROR: IsEnd() is invalid as Begin() is never called
     GetMinLength():     -1
   Valid Bridges:        10
   IsBridgeTile():       false
-  GetBridgeID():        -1
+  GetBridgeType():      -1
   RemoveBridge():       false
   GetLastErrorString(): ERR_PRECONDITION_FAILED
   GetOtherBridgeEnd():  -1
   BuildBridge():        true
   IsBridgeTile():       true
-  GetBridgeID():        5
+  GetBridgeType():      5
   IsBridgeTile():       true
-  GetBridgeID():        5
+  GetBridgeType():      5
   GetOtherBridgeEnd():  33155
   BuildBridge():        false
   GetLastErrorString(): ERR_ALREADY_BUILT
@@ -9711,6 +9711,21 @@ ERROR: IsEnd() is invalid as Begin() is never called
         GetDestinationType():  1
         GetDestinationIndex(): 7
         GetCargoType():        0
+  GetNextEvent:          instance
+    GetEventType:        33
+      EventName:         CompanyRenamed
+      CompanyID:         1
+      CompanyName:       Regression
+  GetNextEvent:          instance
+    GetEventType:        34
+      EventName:         PresidentRenamed
+      CompanyID:         1
+      PresidentName:     Regression AI
+  GetNextEvent:          instance
+    GetEventType:        33
+      EventName:         CompanyRenamed
+      CompanyID:         1
+      CompanyName:       Little Frutford Transport
   IsEventWaiting:        false
 
 --Math--
@@ -9748,9 +9763,9 @@ ERROR: IsEnd() is invalid as Begin() is never called
 --Valuate() with excessive CPU usage--
 Your script made an error: excessive CPU usage in valuator function
 
-*FUNCTION [unknown()] regression/main.nut line [2051]
+*FUNCTION [unknown()] regression/main.nut line [2065]
 *FUNCTION [Valuate()] NATIVE line [-1]
-*FUNCTION [Start()] regression/main.nut line [2052]
+*FUNCTION [Start()] regression/main.nut line [2066]
 
 [id] 0
 [this] TABLE
@@ -9759,7 +9774,7 @@ Your script made an error: excessive CPU usage in valuator function
 [this] INSTANCE
 Your script made an error: excessive CPU usage in valuator function
 
-*FUNCTION [Start()] regression/main.nut line [2052]
+*FUNCTION [Start()] regression/main.nut line [2066]
 
 [Infinite] CLOSURE
 [list] INSTANCE

src/3rdparty/fmt/CMakeLists.txt

@@ -1,9 +1,18 @@
 add_files(
+    args.h
+    base.h
     chrono.h
+    color.h
+    compile.h
     core.h
+    format.cc
     format.h
     format-inl.h
+    os.cc
+    os.h
     ostream.h
+    printf.h
     ranges.h
     std.h
+    xchar.h
 )

src/3rdparty/fmt/args.h

@@ -0,0 +1,220 @@
+// Formatting library for C++ - dynamic argument lists
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_ARGS_H_
+#define FMT_ARGS_H_
+
+#ifndef FMT_MODULE
+#  include <functional>  // std::reference_wrapper
+#  include <memory>      // std::unique_ptr
+#  include <vector>
+#endif
+
+#include "format.h"  // std_string_view
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+template <typename T> struct is_reference_wrapper : std::false_type {};
+template <typename T>
+struct is_reference_wrapper<std::reference_wrapper<T>> : std::true_type {};
+
+template <typename T> auto unwrap(const T& v) -> const T& { return v; }
+template <typename T>
+auto unwrap(const std::reference_wrapper<T>& v) -> const T& {
+  return static_cast<const T&>(v);
+}
+
+// node is defined outside dynamic_arg_list to workaround a C2504 bug in MSVC
+// 2022 (v17.10.0).
+//
+// Workaround for clang's -Wweak-vtables. Unlike for regular classes, for
+// templates it doesn't complain about inability to deduce single translation
+// unit for placing vtable. So node is made a fake template.
+template <typename = void> struct node {
+  virtual ~node() = default;
+  std::unique_ptr<node<>> next;
+};
+
+class dynamic_arg_list {
+  template <typename T> struct typed_node : node<> {
+    T value;
+
+    template <typename Arg>
+    FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {}
+
+    template <typename Char>
+    FMT_CONSTEXPR typed_node(const basic_string_view<Char>& arg)
+        : value(arg.data(), arg.size()) {}
+  };
+
+  std::unique_ptr<node<>> head_;
+
+ public:
+  template <typename T, typename Arg> auto push(const Arg& arg) -> const T& {
+    auto new_node = std::unique_ptr<typed_node<T>>(new typed_node<T>(arg));
+    auto& value = new_node->value;
+    new_node->next = std::move(head_);
+    head_ = std::move(new_node);
+    return value;
+  }
+};
+}  // namespace detail
+
+/**
+ * A dynamic list of formatting arguments with storage.
+ *
+ * It can be implicitly converted into `fmt::basic_format_args` for passing
+ * into type-erased formatting functions such as `fmt::vformat`.
+ */
+template <typename Context> class dynamic_format_arg_store {
+ private:
+  using char_type = typename Context::char_type;
+
+  template <typename T> struct need_copy {
+    static constexpr detail::type mapped_type =
+        detail::mapped_type_constant<T, char_type>::value;
+
+    enum {
+      value = !(detail::is_reference_wrapper<T>::value ||
+                std::is_same<T, basic_string_view<char_type>>::value ||
+                std::is_same<T, detail::std_string_view<char_type>>::value ||
+                (mapped_type != detail::type::cstring_type &&
+                 mapped_type != detail::type::string_type &&
+                 mapped_type != detail::type::custom_type))
+    };
+  };
+
+  template <typename T>
+  using stored_t = conditional_t<
+      std::is_convertible<T, std::basic_string<char_type>>::value &&
+          !detail::is_reference_wrapper<T>::value,
+      std::basic_string<char_type>, T>;
+
+  // Storage of basic_format_arg must be contiguous.
+  std::vector<basic_format_arg<Context>> data_;
+  std::vector<detail::named_arg_info<char_type>> named_info_;
+
+  // Storage of arguments not fitting into basic_format_arg must grow
+  // without relocation because items in data_ refer to it.
+  detail::dynamic_arg_list dynamic_args_;
+
+  friend class basic_format_args<Context>;
+
+  auto data() const -> const basic_format_arg<Context>* {
+    return named_info_.empty() ? data_.data() : data_.data() + 1;
+  }
+
+  template <typename T> void emplace_arg(const T& arg) {
+    data_.emplace_back(arg);
+  }
+
+  template <typename T>
+  void emplace_arg(const detail::named_arg<char_type, T>& arg) {
+    if (named_info_.empty())
+      data_.insert(data_.begin(), basic_format_arg<Context>(nullptr, 0));
+    data_.emplace_back(detail::unwrap(arg.value));
+    auto pop_one = [](std::vector<basic_format_arg<Context>>* data) {
+      data->pop_back();
+    };
+    std::unique_ptr<std::vector<basic_format_arg<Context>>, decltype(pop_one)>
+        guard{&data_, pop_one};
+    named_info_.push_back({arg.name, static_cast<int>(data_.size() - 2u)});
+    data_[0] = {named_info_.data(), named_info_.size()};
+    guard.release();
+  }
+
+ public:
+  constexpr dynamic_format_arg_store() = default;
+
+  operator basic_format_args<Context>() const {
+    return basic_format_args<Context>(data(), static_cast<int>(data_.size()),
+                                      !named_info_.empty());
+  }
+
+  /**
+   * Adds an argument into the dynamic store for later passing to a formatting
+   * function.
+   *
+   * Note that custom types and string types (but not string views) are copied
+   * into the store dynamically allocating memory if necessary.
+   *
+   * **Example**:
+   *
+   *     fmt::dynamic_format_arg_store<fmt::format_context> store;
+   *     store.push_back(42);
+   *     store.push_back("abc");
+   *     store.push_back(1.5f);
+   *     std::string result = fmt::vformat("{} and {} and {}", store);
+   */
+  template <typename T> void push_back(const T& arg) {
+    if (detail::const_check(need_copy<T>::value))
+      emplace_arg(dynamic_args_.push<stored_t<T>>(arg));
+    else
+      emplace_arg(detail::unwrap(arg));
+  }
+
+  /**
+   * Adds a reference to the argument into the dynamic store for later passing
+   * to a formatting function.
+   *
+   * **Example**:
+   *
+   *     fmt::dynamic_format_arg_store<fmt::format_context> store;
+   *     char band[] = "Rolling Stones";
+   *     store.push_back(std::cref(band));
+   *     band[9] = 'c'; // Changing str affects the output.
+   *     std::string result = fmt::vformat("{}", store);
+   *     // result == "Rolling Scones"
+   */
+  template <typename T> void push_back(std::reference_wrapper<T> arg) {
+    static_assert(
+        need_copy<T>::value,
+        "objects of built-in types and string views are always copied");
+    emplace_arg(arg.get());
+  }
+
+  /**
+   * Adds named argument into the dynamic store for later passing to a
+   * formatting function. `std::reference_wrapper` is supported to avoid
+   * copying of the argument. The name is always copied into the store.
+   */
+  template <typename T>
+  void push_back(const detail::named_arg<char_type, T>& arg) {
+    const char_type* arg_name =
+        dynamic_args_.push<std::basic_string<char_type>>(arg.name).c_str();
+    if (detail::const_check(need_copy<T>::value)) {
+      emplace_arg(
+          fmt::arg(arg_name, dynamic_args_.push<stored_t<T>>(arg.value)));
+    } else {
+      emplace_arg(fmt::arg(arg_name, arg.value));
+    }
+  }
+
+  /// Erase all elements from the store.
+  void clear() {
+    data_.clear();
+    named_info_.clear();
+    dynamic_args_ = {};
+  }
+
+  /// Reserves space to store at least `new_cap` arguments including
+  /// `new_cap_named` named arguments.
+  void reserve(size_t new_cap, size_t new_cap_named) {
+    FMT_ASSERT(new_cap >= new_cap_named,
+               "set of arguments includes set of named arguments");
+    data_.reserve(new_cap);
+    named_info_.reserve(new_cap_named);
+  }
+
+  /// Returns the number of elements in the store.
+  size_t size() const noexcept { return data_.size(); }
+};
+
+FMT_END_NAMESPACE
+
+#endif  // FMT_ARGS_H_

src/3rdparty/fmt/color.h

@@ -0,0 +1,610 @@
+// Formatting library for C++ - color support
+//
+// Copyright (c) 2018 - present, Victor Zverovich and fmt contributors
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_COLOR_H_
+#define FMT_COLOR_H_
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+FMT_BEGIN_EXPORT
+
+enum class color : uint32_t {
+  alice_blue = 0xF0F8FF,               // rgb(240,248,255)
+  antique_white = 0xFAEBD7,            // rgb(250,235,215)
+  aqua = 0x00FFFF,                     // rgb(0,255,255)
+  aquamarine = 0x7FFFD4,               // rgb(127,255,212)
+  azure = 0xF0FFFF,                    // rgb(240,255,255)
+  beige = 0xF5F5DC,                    // rgb(245,245,220)
+  bisque = 0xFFE4C4,                   // rgb(255,228,196)
+  black = 0x000000,                    // rgb(0,0,0)
+  blanched_almond = 0xFFEBCD,          // rgb(255,235,205)
+  blue = 0x0000FF,                     // rgb(0,0,255)
+  blue_violet = 0x8A2BE2,              // rgb(138,43,226)
+  brown = 0xA52A2A,                    // rgb(165,42,42)
+  burly_wood = 0xDEB887,               // rgb(222,184,135)
+  cadet_blue = 0x5F9EA0,               // rgb(95,158,160)
+  chartreuse = 0x7FFF00,               // rgb(127,255,0)
+  chocolate = 0xD2691E,                // rgb(210,105,30)
+  coral = 0xFF7F50,                    // rgb(255,127,80)
+  cornflower_blue = 0x6495ED,          // rgb(100,149,237)
+  cornsilk = 0xFFF8DC,                 // rgb(255,248,220)
+  crimson = 0xDC143C,                  // rgb(220,20,60)
+  cyan = 0x00FFFF,                     // rgb(0,255,255)
+  dark_blue = 0x00008B,                // rgb(0,0,139)
+  dark_cyan = 0x008B8B,                // rgb(0,139,139)
+  dark_golden_rod = 0xB8860B,          // rgb(184,134,11)
+  dark_gray = 0xA9A9A9,                // rgb(169,169,169)
+  dark_green = 0x006400,               // rgb(0,100,0)
+  dark_khaki = 0xBDB76B,               // rgb(189,183,107)
+  dark_magenta = 0x8B008B,             // rgb(139,0,139)
+  dark_olive_green = 0x556B2F,         // rgb(85,107,47)
+  dark_orange = 0xFF8C00,              // rgb(255,140,0)
+  dark_orchid = 0x9932CC,              // rgb(153,50,204)
+  dark_red = 0x8B0000,                 // rgb(139,0,0)
+  dark_salmon = 0xE9967A,              // rgb(233,150,122)
+  dark_sea_green = 0x8FBC8F,           // rgb(143,188,143)
+  dark_slate_blue = 0x483D8B,          // rgb(72,61,139)
+  dark_slate_gray = 0x2F4F4F,          // rgb(47,79,79)
+  dark_turquoise = 0x00CED1,           // rgb(0,206,209)
+  dark_violet = 0x9400D3,              // rgb(148,0,211)
+  deep_pink = 0xFF1493,                // rgb(255,20,147)
+  deep_sky_blue = 0x00BFFF,            // rgb(0,191,255)
+  dim_gray = 0x696969,                 // rgb(105,105,105)
+  dodger_blue = 0x1E90FF,              // rgb(30,144,255)
+  fire_brick = 0xB22222,               // rgb(178,34,34)
+  floral_white = 0xFFFAF0,             // rgb(255,250,240)
+  forest_green = 0x228B22,             // rgb(34,139,34)
+  fuchsia = 0xFF00FF,                  // rgb(255,0,255)
+  gainsboro = 0xDCDCDC,                // rgb(220,220,220)
+  ghost_white = 0xF8F8FF,              // rgb(248,248,255)
+  gold = 0xFFD700,                     // rgb(255,215,0)
+  golden_rod = 0xDAA520,               // rgb(218,165,32)
+  gray = 0x808080,                     // rgb(128,128,128)
+  green = 0x008000,                    // rgb(0,128,0)
+  green_yellow = 0xADFF2F,             // rgb(173,255,47)
+  honey_dew = 0xF0FFF0,                // rgb(240,255,240)
+  hot_pink = 0xFF69B4,                 // rgb(255,105,180)
+  indian_red = 0xCD5C5C,               // rgb(205,92,92)
+  indigo = 0x4B0082,                   // rgb(75,0,130)
+  ivory = 0xFFFFF0,                    // rgb(255,255,240)
+  khaki = 0xF0E68C,                    // rgb(240,230,140)
+  lavender = 0xE6E6FA,                 // rgb(230,230,250)
+  lavender_blush = 0xFFF0F5,           // rgb(255,240,245)
+  lawn_green = 0x7CFC00,               // rgb(124,252,0)
+  lemon_chiffon = 0xFFFACD,            // rgb(255,250,205)
+  light_blue = 0xADD8E6,               // rgb(173,216,230)
+  light_coral = 0xF08080,              // rgb(240,128,128)
+  light_cyan = 0xE0FFFF,               // rgb(224,255,255)
+  light_golden_rod_yellow = 0xFAFAD2,  // rgb(250,250,210)
+  light_gray = 0xD3D3D3,               // rgb(211,211,211)
+  light_green = 0x90EE90,              // rgb(144,238,144)
+  light_pink = 0xFFB6C1,               // rgb(255,182,193)
+  light_salmon = 0xFFA07A,             // rgb(255,160,122)
+  light_sea_green = 0x20B2AA,          // rgb(32,178,170)
+  light_sky_blue = 0x87CEFA,           // rgb(135,206,250)
+  light_slate_gray = 0x778899,         // rgb(119,136,153)
+  light_steel_blue = 0xB0C4DE,         // rgb(176,196,222)
+  light_yellow = 0xFFFFE0,             // rgb(255,255,224)
+  lime = 0x00FF00,                     // rgb(0,255,0)
+  lime_green = 0x32CD32,               // rgb(50,205,50)
+  linen = 0xFAF0E6,                    // rgb(250,240,230)
+  magenta = 0xFF00FF,                  // rgb(255,0,255)
+  maroon = 0x800000,                   // rgb(128,0,0)
+  medium_aquamarine = 0x66CDAA,        // rgb(102,205,170)
+  medium_blue = 0x0000CD,              // rgb(0,0,205)
+  medium_orchid = 0xBA55D3,            // rgb(186,85,211)
+  medium_purple = 0x9370DB,            // rgb(147,112,219)
+  medium_sea_green = 0x3CB371,         // rgb(60,179,113)
+  medium_slate_blue = 0x7B68EE,        // rgb(123,104,238)
+  medium_spring_green = 0x00FA9A,      // rgb(0,250,154)
+  medium_turquoise = 0x48D1CC,         // rgb(72,209,204)
+  medium_violet_red = 0xC71585,        // rgb(199,21,133)
+  midnight_blue = 0x191970,            // rgb(25,25,112)
+  mint_cream = 0xF5FFFA,               // rgb(245,255,250)
+  misty_rose = 0xFFE4E1,               // rgb(255,228,225)
+  moccasin = 0xFFE4B5,                 // rgb(255,228,181)
+  navajo_white = 0xFFDEAD,             // rgb(255,222,173)
+  navy = 0x000080,                     // rgb(0,0,128)
+  old_lace = 0xFDF5E6,                 // rgb(253,245,230)
+  olive = 0x808000,                    // rgb(128,128,0)
+  olive_drab = 0x6B8E23,               // rgb(107,142,35)
+  orange = 0xFFA500,                   // rgb(255,165,0)
+  orange_red = 0xFF4500,               // rgb(255,69,0)
+  orchid = 0xDA70D6,                   // rgb(218,112,214)
+  pale_golden_rod = 0xEEE8AA,          // rgb(238,232,170)
+  pale_green = 0x98FB98,               // rgb(152,251,152)
+  pale_turquoise = 0xAFEEEE,           // rgb(175,238,238)
+  pale_violet_red = 0xDB7093,          // rgb(219,112,147)
+  papaya_whip = 0xFFEFD5,              // rgb(255,239,213)
+  peach_puff = 0xFFDAB9,               // rgb(255,218,185)
+  peru = 0xCD853F,                     // rgb(205,133,63)
+  pink = 0xFFC0CB,                     // rgb(255,192,203)
+  plum = 0xDDA0DD,                     // rgb(221,160,221)
+  powder_blue = 0xB0E0E6,              // rgb(176,224,230)
+  purple = 0x800080,                   // rgb(128,0,128)
+  rebecca_purple = 0x663399,           // rgb(102,51,153)
+  red = 0xFF0000,                      // rgb(255,0,0)
+  rosy_brown = 0xBC8F8F,               // rgb(188,143,143)
+  royal_blue = 0x4169E1,               // rgb(65,105,225)
+  saddle_brown = 0x8B4513,             // rgb(139,69,19)
+  salmon = 0xFA8072,                   // rgb(250,128,114)
+  sandy_brown = 0xF4A460,              // rgb(244,164,96)
+  sea_green = 0x2E8B57,                // rgb(46,139,87)
+  sea_shell = 0xFFF5EE,                // rgb(255,245,238)
+  sienna = 0xA0522D,                   // rgb(160,82,45)
+  silver = 0xC0C0C0,                   // rgb(192,192,192)
+  sky_blue = 0x87CEEB,                 // rgb(135,206,235)
+  slate_blue = 0x6A5ACD,               // rgb(106,90,205)
+  slate_gray = 0x708090,               // rgb(112,128,144)
+  snow = 0xFFFAFA,                     // rgb(255,250,250)
+  spring_green = 0x00FF7F,             // rgb(0,255,127)
+  steel_blue = 0x4682B4,               // rgb(70,130,180)
+  tan = 0xD2B48C,                      // rgb(210,180,140)
+  teal = 0x008080,                     // rgb(0,128,128)
+  thistle = 0xD8BFD8,                  // rgb(216,191,216)
+  tomato = 0xFF6347,                   // rgb(255,99,71)
+  turquoise = 0x40E0D0,                // rgb(64,224,208)
+  violet = 0xEE82EE,                   // rgb(238,130,238)
+  wheat = 0xF5DEB3,                    // rgb(245,222,179)
+  white = 0xFFFFFF,                    // rgb(255,255,255)
+  white_smoke = 0xF5F5F5,              // rgb(245,245,245)
+  yellow = 0xFFFF00,                   // rgb(255,255,0)
+  yellow_green = 0x9ACD32              // rgb(154,205,50)
+};                                     // enum class color
+
+enum class terminal_color : uint8_t {
+  black = 30,
+  red,
+  green,
+  yellow,
+  blue,
+  magenta,
+  cyan,
+  white,
+  bright_black = 90,
+  bright_red,
+  bright_green,
+  bright_yellow,
+  bright_blue,
+  bright_magenta,
+  bright_cyan,
+  bright_white
+};
+
+enum class emphasis : uint8_t {
+  bold = 1,
+  faint = 1 << 1,
+  italic = 1 << 2,
+  underline = 1 << 3,
+  blink = 1 << 4,
+  reverse = 1 << 5,
+  conceal = 1 << 6,
+  strikethrough = 1 << 7,
+};
+
+// rgb is a struct for red, green and blue colors.
+// Using the name "rgb" makes some editors show the color in a tooltip.
+struct rgb {
+  FMT_CONSTEXPR rgb() : r(0), g(0), b(0) {}
+  FMT_CONSTEXPR rgb(uint8_t r_, uint8_t g_, uint8_t b_) : r(r_), g(g_), b(b_) {}
+  FMT_CONSTEXPR rgb(uint32_t hex)
+      : r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b(hex & 0xFF) {}
+  FMT_CONSTEXPR rgb(color hex)
+      : r((uint32_t(hex) >> 16) & 0xFF),
+        g((uint32_t(hex) >> 8) & 0xFF),
+        b(uint32_t(hex) & 0xFF) {}
+  uint8_t r;
+  uint8_t g;
+  uint8_t b;
+};
+
+namespace detail {
+
+// color is a struct of either a rgb color or a terminal color.
+struct color_type {
+  FMT_CONSTEXPR color_type() noexcept : is_rgb(), value{} {}
+  FMT_CONSTEXPR color_type(color rgb_color) noexcept : is_rgb(true), value{} {
+    value.rgb_color = static_cast<uint32_t>(rgb_color);
+  }
+  FMT_CONSTEXPR color_type(rgb rgb_color) noexcept : is_rgb(true), value{} {
+    value.rgb_color = (static_cast<uint32_t>(rgb_color.r) << 16) |
+                      (static_cast<uint32_t>(rgb_color.g) << 8) | rgb_color.b;
+  }
+  FMT_CONSTEXPR color_type(terminal_color term_color) noexcept
+      : is_rgb(), value{} {
+    value.term_color = static_cast<uint8_t>(term_color);
+  }
+  bool is_rgb;
+  union color_union {
+    uint8_t term_color;
+    uint32_t rgb_color;
+  } value;
+};
+}  // namespace detail
+
+/// A text style consisting of foreground and background colors and emphasis.
+class text_style {
+ public:
+  FMT_CONSTEXPR text_style(emphasis em = emphasis()) noexcept
+      : set_foreground_color(), set_background_color(), ems(em) {}
+
+  FMT_CONSTEXPR auto operator|=(const text_style& rhs) -> text_style& {
+    if (!set_foreground_color) {
+      set_foreground_color = rhs.set_foreground_color;
+      foreground_color = rhs.foreground_color;
+    } else if (rhs.set_foreground_color) {
+      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
+        report_error("can't OR a terminal color");
+      foreground_color.value.rgb_color |= rhs.foreground_color.value.rgb_color;
+    }
+
+    if (!set_background_color) {
+      set_background_color = rhs.set_background_color;
+      background_color = rhs.background_color;
+    } else if (rhs.set_background_color) {
+      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
+        report_error("can't OR a terminal color");
+      background_color.value.rgb_color |= rhs.background_color.value.rgb_color;
+    }
+
+    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) |
+                                static_cast<uint8_t>(rhs.ems));
+    return *this;
+  }
+
+  friend FMT_CONSTEXPR auto operator|(text_style lhs, const text_style& rhs)
+      -> text_style {
+    return lhs |= rhs;
+  }
+
+  FMT_CONSTEXPR auto has_foreground() const noexcept -> bool {
+    return set_foreground_color;
+  }
+  FMT_CONSTEXPR auto has_background() const noexcept -> bool {
+    return set_background_color;
+  }
+  FMT_CONSTEXPR auto has_emphasis() const noexcept -> bool {
+    return static_cast<uint8_t>(ems) != 0;
+  }
+  FMT_CONSTEXPR auto get_foreground() const noexcept -> detail::color_type {
+    FMT_ASSERT(has_foreground(), "no foreground specified for this style");
+    return foreground_color;
+  }
+  FMT_CONSTEXPR auto get_background() const noexcept -> detail::color_type {
+    FMT_ASSERT(has_background(), "no background specified for this style");
+    return background_color;
+  }
+  FMT_CONSTEXPR auto get_emphasis() const noexcept -> emphasis {
+    FMT_ASSERT(has_emphasis(), "no emphasis specified for this style");
+    return ems;
+  }
+
+ private:
+  FMT_CONSTEXPR text_style(bool is_foreground,
+                           detail::color_type text_color) noexcept
+      : set_foreground_color(), set_background_color(), ems() {
+    if (is_foreground) {
+      foreground_color = text_color;
+      set_foreground_color = true;
+    } else {
+      background_color = text_color;
+      set_background_color = true;
+    }
+  }
+
+  friend FMT_CONSTEXPR auto fg(detail::color_type foreground) noexcept
+      -> text_style;
+
+  friend FMT_CONSTEXPR auto bg(detail::color_type background) noexcept
+      -> text_style;
+
+  detail::color_type foreground_color;
+  detail::color_type background_color;
+  bool set_foreground_color;
+  bool set_background_color;
+  emphasis ems;
+};
+
+/// Creates a text style from the foreground (text) color.
+FMT_CONSTEXPR inline auto fg(detail::color_type foreground) noexcept
+    -> text_style {
+  return text_style(true, foreground);
+}
+
+/// Creates a text style from the background color.
+FMT_CONSTEXPR inline auto bg(detail::color_type background) noexcept
+    -> text_style {
+  return text_style(false, background);
+}
+
+FMT_CONSTEXPR inline auto operator|(emphasis lhs, emphasis rhs) noexcept
+    -> text_style {
+  return text_style(lhs) | rhs;
+}
+
+namespace detail {
+
+template <typename Char> struct ansi_color_escape {
+  FMT_CONSTEXPR ansi_color_escape(color_type text_color,
+                                  const char* esc) noexcept {
+    // If we have a terminal color, we need to output another escape code
+    // sequence.
+    if (!text_color.is_rgb) {
+      bool is_background = esc == string_view("\x1b[48;2;");
+      uint32_t value = text_color.value.term_color;
+      // Background ASCII codes are the same as the foreground ones but with
+      // 10 more.
+      if (is_background) value += 10u;
+
+      size_t index = 0;
+      buffer[index++] = static_cast<Char>('\x1b');
+      buffer[index++] = static_cast<Char>('[');
+
+      if (value >= 100u) {
+        buffer[index++] = static_cast<Char>('1');
+        value %= 100u;
+      }
+      buffer[index++] = static_cast<Char>('0' + value / 10u);
+      buffer[index++] = static_cast<Char>('0' + value % 10u);
+
+      buffer[index++] = static_cast<Char>('m');
+      buffer[index++] = static_cast<Char>('\0');
+      return;
+    }
+
+    for (int i = 0; i < 7; i++) {
+      buffer[i] = static_cast<Char>(esc[i]);
+    }
+    rgb color(text_color.value.rgb_color);
+    to_esc(color.r, buffer + 7, ';');
+    to_esc(color.g, buffer + 11, ';');
+    to_esc(color.b, buffer + 15, 'm');
+    buffer[19] = static_cast<Char>(0);
+  }
+  FMT_CONSTEXPR ansi_color_escape(emphasis em) noexcept {
+    uint8_t em_codes[num_emphases] = {};
+    if (has_emphasis(em, emphasis::bold)) em_codes[0] = 1;
+    if (has_emphasis(em, emphasis::faint)) em_codes[1] = 2;
+    if (has_emphasis(em, emphasis::italic)) em_codes[2] = 3;
+    if (has_emphasis(em, emphasis::underline)) em_codes[3] = 4;
+    if (has_emphasis(em, emphasis::blink)) em_codes[4] = 5;
+    if (has_emphasis(em, emphasis::reverse)) em_codes[5] = 7;
+    if (has_emphasis(em, emphasis::conceal)) em_codes[6] = 8;
+    if (has_emphasis(em, emphasis::strikethrough)) em_codes[7] = 9;
+
+    size_t index = 0;
+    for (size_t i = 0; i < num_emphases; ++i) {
+      if (!em_codes[i]) continue;
+      buffer[index++] = static_cast<Char>('\x1b');
+      buffer[index++] = static_cast<Char>('[');
+      buffer[index++] = static_cast<Char>('0' + em_codes[i]);
+      buffer[index++] = static_cast<Char>('m');
+    }
+    buffer[index++] = static_cast<Char>(0);
+  }
+  FMT_CONSTEXPR operator const Char*() const noexcept { return buffer; }
+
+  FMT_CONSTEXPR auto begin() const noexcept -> const Char* { return buffer; }
+  FMT_CONSTEXPR20 auto end() const noexcept -> const Char* {
+    return buffer + basic_string_view<Char>(buffer).size();
+  }
+
+ private:
+  static constexpr size_t num_emphases = 8;
+  Char buffer[7u + 3u * num_emphases + 1u];
+
+  static FMT_CONSTEXPR void to_esc(uint8_t c, Char* out,
+                                   char delimiter) noexcept {
+    out[0] = static_cast<Char>('0' + c / 100);
+    out[1] = static_cast<Char>('0' + c / 10 % 10);
+    out[2] = static_cast<Char>('0' + c % 10);
+    out[3] = static_cast<Char>(delimiter);
+  }
+  static FMT_CONSTEXPR auto has_emphasis(emphasis em, emphasis mask) noexcept
+      -> bool {
+    return static_cast<uint8_t>(em) & static_cast<uint8_t>(mask);
+  }
+};
+
+template <typename Char>
+FMT_CONSTEXPR auto make_foreground_color(color_type foreground) noexcept
+    -> ansi_color_escape<Char> {
+  return ansi_color_escape<Char>(foreground, "\x1b[38;2;");
+}
+
+template <typename Char>
+FMT_CONSTEXPR auto make_background_color(color_type background) noexcept
+    -> ansi_color_escape<Char> {
+  return ansi_color_escape<Char>(background, "\x1b[48;2;");
+}
+
+template <typename Char>
+FMT_CONSTEXPR auto make_emphasis(emphasis em) noexcept
+    -> ansi_color_escape<Char> {
+  return ansi_color_escape<Char>(em);
+}
+
+template <typename Char> inline void reset_color(buffer<Char>& buffer) {
+  auto reset_color = string_view("\x1b[0m");
+  buffer.append(reset_color.begin(), reset_color.end());
+}
+
+template <typename T> struct styled_arg : view {
+  const T& value;
+  text_style style;
+  styled_arg(const T& v, text_style s) : value(v), style(s) {}
+};
+
+template <typename Char>
+void vformat_to(buffer<Char>& buf, const text_style& ts,
+                basic_string_view<Char> fmt,
+                basic_format_args<buffered_context<Char>> args) {
+  bool has_style = false;
+  if (ts.has_emphasis()) {
+    has_style = true;
+    auto emphasis = make_emphasis<Char>(ts.get_emphasis());
+    buf.append(emphasis.begin(), emphasis.end());
+  }
+  if (ts.has_foreground()) {
+    has_style = true;
+    auto foreground = make_foreground_color<Char>(ts.get_foreground());
+    buf.append(foreground.begin(), foreground.end());
+  }
+  if (ts.has_background()) {
+    has_style = true;
+    auto background = make_background_color<Char>(ts.get_background());
+    buf.append(background.begin(), background.end());
+  }
+  vformat_to(buf, fmt, args);
+  if (has_style) reset_color<Char>(buf);
+}
+}  // namespace detail
+
+inline void vprint(FILE* f, const text_style& ts, string_view fmt,
+                   format_args args) {
+  auto buf = memory_buffer();
+  detail::vformat_to(buf, ts, fmt, args);
+  print(f, FMT_STRING("{}"), string_view(buf.begin(), buf.size()));
+}
+
+/**
+ * Formats a string and prints it to the specified file stream using ANSI
+ * escape sequences to specify text formatting.
+ *
+ * **Example**:
+ *
+ *     fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
+ *                "Elapsed time: {0:.2f} seconds", 1.23);
+ */
+template <typename... T>
+void print(FILE* f, const text_style& ts, format_string<T...> fmt,
+           T&&... args) {
+  vprint(f, ts, fmt.str, vargs<T...>{{args...}});
+}
+
+/**
+ * Formats a string and prints it to stdout using ANSI escape sequences to
+ * specify text formatting.
+ *
+ * **Example**:
+ *
+ *     fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
+ *                "Elapsed time: {0:.2f} seconds", 1.23);
+ */
+template <typename... T>
+void print(const text_style& ts, format_string<T...> fmt, T&&... args) {
+  return print(stdout, ts, fmt, std::forward<T>(args)...);
+}
+
+inline auto vformat(const text_style& ts, string_view fmt, format_args args)
+    -> std::string {
+  auto buf = memory_buffer();
+  detail::vformat_to(buf, ts, fmt, args);
+  return fmt::to_string(buf);
+}
+
+/**
+ * Formats arguments and returns the result as a string using ANSI escape
+ * sequences to specify text formatting.
+ *
+ * **Example**:
+ *
+ * ```
+ * #include <fmt/color.h>
+ * std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
+ *                                   "The answer is {}", 42);
+ * ```
+ */
+template <typename... T>
+inline auto format(const text_style& ts, format_string<T...> fmt, T&&... args)
+    -> std::string {
+  return fmt::vformat(ts, fmt.str, vargs<T...>{{args...}});
+}
+
+/// Formats a string with the given text_style and writes the output to `out`.
+template <typename OutputIt,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+auto vformat_to(OutputIt out, const text_style& ts, string_view fmt,
+                format_args args) -> OutputIt {
+  auto&& buf = detail::get_buffer<char>(out);
+  detail::vformat_to(buf, ts, fmt, args);
+  return detail::get_iterator(buf, out);
+}
+
+/**
+ * Formats arguments with the given text style, writes the result to the output
+ * iterator `out` and returns the iterator past the end of the output range.
+ *
+ * **Example**:
+ *
+ *     std::vector<char> out;
+ *     fmt::format_to(std::back_inserter(out),
+ *                    fmt::emphasis::bold | fg(fmt::color::red), "{}", 42);
+ */
+template <typename OutputIt, typename... T,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
+inline auto format_to(OutputIt out, const text_style& ts,
+                      format_string<T...> fmt, T&&... args) -> OutputIt {
+  return vformat_to(out, ts, fmt.str, vargs<T...>{{args...}});
+}
+
+template <typename T, typename Char>
+struct formatter<detail::styled_arg<T>, Char> : formatter<T, Char> {
+  template <typename FormatContext>
+  auto format(const detail::styled_arg<T>& arg, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    const auto& ts = arg.style;
+    auto out = ctx.out();
+
+    bool has_style = false;
+    if (ts.has_emphasis()) {
+      has_style = true;
+      auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
+      out = detail::copy<Char>(emphasis.begin(), emphasis.end(), out);
+    }
+    if (ts.has_foreground()) {
+      has_style = true;
+      auto foreground =
+          detail::make_foreground_color<Char>(ts.get_foreground());
+      out = detail::copy<Char>(foreground.begin(), foreground.end(), out);
+    }
+    if (ts.has_background()) {
+      has_style = true;
+      auto background =
+          detail::make_background_color<Char>(ts.get_background());
+      out = detail::copy<Char>(background.begin(), background.end(), out);
+    }
+    out = formatter<T, Char>::format(arg.value, ctx);
+    if (has_style) {
+      auto reset_color = string_view("\x1b[0m");
+      out = detail::copy<Char>(reset_color.begin(), reset_color.end(), out);
+    }
+    return out;
+  }
+};
+
+/**
+ * Returns an argument that will be formatted using ANSI escape sequences,
+ * to be used in a formatting function.
+ *
+ * **Example**:
+ *
+ *     fmt::print("Elapsed time: {0:.2f} seconds",
+ *                fmt::styled(1.23, fmt::fg(fmt::color::green) |
+ *                                  fmt::bg(fmt::color::blue)));
+ */
+template <typename T>
+FMT_CONSTEXPR auto styled(const T& value, text_style ts)
+    -> detail::styled_arg<remove_cvref_t<T>> {
+  return detail::styled_arg<remove_cvref_t<T>>{value, ts};
+}
+
+FMT_END_EXPORT
+FMT_END_NAMESPACE
+
+#endif  // FMT_COLOR_H_

src/3rdparty/fmt/compile.h

@@ -0,0 +1,539 @@
+// Formatting library for C++ - experimental format string compilation
+//
+// Copyright (c) 2012 - present, Victor Zverovich and fmt contributors
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_COMPILE_H_
+#define FMT_COMPILE_H_
+
+#ifndef FMT_MODULE
+#  include <iterator>  // std::back_inserter
+#endif
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+// A compile-time string which is compiled into fast formatting code.
+FMT_EXPORT class compiled_string {};
+
+template <typename S>
+struct is_compiled_string : std::is_base_of<compiled_string, S> {};
+
+namespace detail {
+
+/**
+ * Converts a string literal `s` into a format string that will be parsed at
+ * compile time and converted into efficient formatting code. Requires C++17
+ * `constexpr if` compiler support.
+ *
+ * **Example**:
+ *
+ *     // Converts 42 into std::string using the most efficient method and no
+ *     // runtime format string processing.
+ *     std::string s = fmt::format(FMT_COMPILE("{}"), 42);
+ */
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+#  define FMT_COMPILE(s) FMT_STRING_IMPL(s, fmt::compiled_string)
+#else
+#  define FMT_COMPILE(s) FMT_STRING(s)
+#endif
+
+template <typename T, typename... Tail>
+auto first(const T& value, const Tail&...) -> const T& {
+  return value;
+}
+
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+template <typename... Args> struct type_list {};
+
+// Returns a reference to the argument at index N from [first, rest...].
+template <int N, typename T, typename... Args>
+constexpr const auto& get([[maybe_unused]] const T& first,
+                          [[maybe_unused]] const Args&... rest) {
+  static_assert(N < 1 + sizeof...(Args), "index is out of bounds");
+  if constexpr (N == 0)
+    return first;
+  else
+    return detail::get<N - 1>(rest...);
+}
+
+#  if FMT_USE_NONTYPE_TEMPLATE_ARGS
+template <int N, typename T, typename... Args, typename Char>
+constexpr auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
+  if constexpr (is_static_named_arg<T>()) {
+    if (name == T::name) return N;
+  }
+  if constexpr (sizeof...(Args) > 0)
+    return get_arg_index_by_name<N + 1, Args...>(name);
+  (void)name;  // Workaround an MSVC bug about "unused" parameter.
+  return -1;
+}
+#  endif
+
+template <typename... Args, typename Char>
+FMT_CONSTEXPR auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
+#  if FMT_USE_NONTYPE_TEMPLATE_ARGS
+  if constexpr (sizeof...(Args) > 0)
+    return get_arg_index_by_name<0, Args...>(name);
+#  endif
+  (void)name;
+  return -1;
+}
+
+template <typename Char, typename... Args>
+constexpr int get_arg_index_by_name(basic_string_view<Char> name,
+                                    type_list<Args...>) {
+  return get_arg_index_by_name<Args...>(name);
+}
+
+template <int N, typename> struct get_type_impl;
+
+template <int N, typename... Args> struct get_type_impl<N, type_list<Args...>> {
+  using type =
+      remove_cvref_t<decltype(detail::get<N>(std::declval<Args>()...))>;
+};
+
+template <int N, typename T>
+using get_type = typename get_type_impl<N, T>::type;
+
+template <typename T> struct is_compiled_format : std::false_type {};
+
+template <typename Char> struct text {
+  basic_string_view<Char> data;
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&...) const {
+    return write<Char>(out, data);
+  }
+};
+
+template <typename Char>
+struct is_compiled_format<text<Char>> : std::true_type {};
+
+template <typename Char>
+constexpr text<Char> make_text(basic_string_view<Char> s, size_t pos,
+                               size_t size) {
+  return {{&s[pos], size}};
+}
+
+template <typename Char> struct code_unit {
+  Char value;
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&...) const {
+    *out++ = value;
+    return out;
+  }
+};
+
+// This ensures that the argument type is convertible to `const T&`.
+template <typename T, int N, typename... Args>
+constexpr const T& get_arg_checked(const Args&... args) {
+  const auto& arg = detail::get<N>(args...);
+  if constexpr (detail::is_named_arg<remove_cvref_t<decltype(arg)>>()) {
+    return arg.value;
+  } else {
+    return arg;
+  }
+}
+
+template <typename Char>
+struct is_compiled_format<code_unit<Char>> : std::true_type {};
+
+// A replacement field that refers to argument N.
+template <typename Char, typename T, int N> struct field {
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
+    const T& arg = get_arg_checked<T, N>(args...);
+    if constexpr (std::is_convertible<T, basic_string_view<Char>>::value) {
+      auto s = basic_string_view<Char>(arg);
+      return copy<Char>(s.begin(), s.end(), out);
+    } else {
+      return write<Char>(out, arg);
+    }
+  }
+};
+
+template <typename Char, typename T, int N>
+struct is_compiled_format<field<Char, T, N>> : std::true_type {};
+
+// A replacement field that refers to argument with name.
+template <typename Char> struct runtime_named_field {
+  using char_type = Char;
+  basic_string_view<Char> name;
+
+  template <typename OutputIt, typename T>
+  constexpr static bool try_format_argument(
+      OutputIt& out,
+      // [[maybe_unused]] due to unused-but-set-parameter warning in GCC 7,8,9
+      [[maybe_unused]] basic_string_view<Char> arg_name, const T& arg) {
+    if constexpr (is_named_arg<typename std::remove_cv<T>::type>::value) {
+      if (arg_name == arg.name) {
+        out = write<Char>(out, arg.value);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
+    bool found = (try_format_argument(out, name, args) || ...);
+    if (!found) {
+      FMT_THROW(format_error("argument with specified name is not found"));
+    }
+    return out;
+  }
+};
+
+template <typename Char>
+struct is_compiled_format<runtime_named_field<Char>> : std::true_type {};
+
+// A replacement field that refers to argument N and has format specifiers.
+template <typename Char, typename T, int N> struct spec_field {
+  using char_type = Char;
+  formatter<T, Char> fmt;
+
+  template <typename OutputIt, typename... Args>
+  constexpr FMT_INLINE OutputIt format(OutputIt out,
+                                       const Args&... args) const {
+    const auto& vargs =
+        fmt::make_format_args<basic_format_context<OutputIt, Char>>(args...);
+    basic_format_context<OutputIt, Char> ctx(out, vargs);
+    return fmt.format(get_arg_checked<T, N>(args...), ctx);
+  }
+};
+
+template <typename Char, typename T, int N>
+struct is_compiled_format<spec_field<Char, T, N>> : std::true_type {};
+
+template <typename L, typename R> struct concat {
+  L lhs;
+  R rhs;
+  using char_type = typename L::char_type;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
+    out = lhs.format(out, args...);
+    return rhs.format(out, args...);
+  }
+};
+
+template <typename L, typename R>
+struct is_compiled_format<concat<L, R>> : std::true_type {};
+
+template <typename L, typename R>
+constexpr concat<L, R> make_concat(L lhs, R rhs) {
+  return {lhs, rhs};
+}
+
+struct unknown_format {};
+
+template <typename Char>
+constexpr size_t parse_text(basic_string_view<Char> str, size_t pos) {
+  for (size_t size = str.size(); pos != size; ++pos) {
+    if (str[pos] == '{' || str[pos] == '}') break;
+  }
+  return pos;
+}
+
+template <typename Args, size_t POS, int ID, typename S>
+constexpr auto compile_format_string(S fmt);
+
+template <typename Args, size_t POS, int ID, typename T, typename S>
+constexpr auto parse_tail(T head, S fmt) {
+  if constexpr (POS != basic_string_view<typename S::char_type>(fmt).size()) {
+    constexpr auto tail = compile_format_string<Args, POS, ID>(fmt);
+    if constexpr (std::is_same<remove_cvref_t<decltype(tail)>,
+                               unknown_format>())
+      return tail;
+    else
+      return make_concat(head, tail);
+  } else {
+    return head;
+  }
+}
+
+template <typename T, typename Char> struct parse_specs_result {
+  formatter<T, Char> fmt;
+  size_t end;
+  int next_arg_id;
+};
+
+enum { manual_indexing_id = -1 };
+
+template <typename T, typename Char>
+constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
+                                                  size_t pos, int next_arg_id) {
+  str.remove_prefix(pos);
+  auto ctx =
+      compile_parse_context<Char>(str, max_value<int>(), nullptr, next_arg_id);
+  auto f = formatter<T, Char>();
+  auto end = f.parse(ctx);
+  return {f, pos + fmt::detail::to_unsigned(end - str.data()),
+          next_arg_id == 0 ? manual_indexing_id : ctx.next_arg_id()};
+}
+
+template <typename Char> struct arg_id_handler {
+  arg_id_kind kind;
+  arg_ref<Char> arg_id;
+
+  constexpr int on_auto() {
+    FMT_ASSERT(false, "handler cannot be used with automatic indexing");
+    return 0;
+  }
+  constexpr int on_index(int id) {
+    kind = arg_id_kind::index;
+    arg_id = arg_ref<Char>(id);
+    return 0;
+  }
+  constexpr int on_name(basic_string_view<Char> id) {
+    kind = arg_id_kind::name;
+    arg_id = arg_ref<Char>(id);
+    return 0;
+  }
+};
+
+template <typename Char> struct parse_arg_id_result {
+  arg_id_kind kind;
+  arg_ref<Char> arg_id;
+  const Char* arg_id_end;
+};
+
+template <int ID, typename Char>
+constexpr auto parse_arg_id(const Char* begin, const Char* end) {
+  auto handler = arg_id_handler<Char>{arg_id_kind::none, arg_ref<Char>{}};
+  auto arg_id_end = parse_arg_id(begin, end, handler);
+  return parse_arg_id_result<Char>{handler.kind, handler.arg_id, arg_id_end};
+}
+
+template <typename T, typename Enable = void> struct field_type {
+  using type = remove_cvref_t<T>;
+};
+
+template <typename T>
+struct field_type<T, enable_if_t<detail::is_named_arg<T>::value>> {
+  using type = remove_cvref_t<decltype(T::value)>;
+};
+
+template <typename T, typename Args, size_t END_POS, int ARG_INDEX, int NEXT_ID,
+          typename S>
+constexpr auto parse_replacement_field_then_tail(S fmt) {
+  using char_type = typename S::char_type;
+  constexpr auto str = basic_string_view<char_type>(fmt);
+  constexpr char_type c = END_POS != str.size() ? str[END_POS] : char_type();
+  if constexpr (c == '}') {
+    return parse_tail<Args, END_POS + 1, NEXT_ID>(
+        field<char_type, typename field_type<T>::type, ARG_INDEX>(), fmt);
+  } else if constexpr (c != ':') {
+    FMT_THROW(format_error("expected ':'"));
+  } else {
+    constexpr auto result = parse_specs<typename field_type<T>::type>(
+        str, END_POS + 1, NEXT_ID == manual_indexing_id ? 0 : NEXT_ID);
+    if constexpr (result.end >= str.size() || str[result.end] != '}') {
+      FMT_THROW(format_error("expected '}'"));
+      return 0;
+    } else {
+      return parse_tail<Args, result.end + 1, result.next_arg_id>(
+          spec_field<char_type, typename field_type<T>::type, ARG_INDEX>{
+              result.fmt},
+          fmt);
+    }
+  }
+}
+
+// Compiles a non-empty format string and returns the compiled representation
+// or unknown_format() on unrecognized input.
+template <typename Args, size_t POS, int ID, typename S>
+constexpr auto compile_format_string(S fmt) {
+  using char_type = typename S::char_type;
+  constexpr auto str = basic_string_view<char_type>(fmt);
+  if constexpr (str[POS] == '{') {
+    if constexpr (POS + 1 == str.size())
+      FMT_THROW(format_error("unmatched '{' in format string"));
+    if constexpr (str[POS + 1] == '{') {
+      return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), fmt);
+    } else if constexpr (str[POS + 1] == '}' || str[POS + 1] == ':') {
+      static_assert(ID != manual_indexing_id,
+                    "cannot switch from manual to automatic argument indexing");
+      constexpr auto next_id =
+          ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
+      return parse_replacement_field_then_tail<get_type<ID, Args>, Args,
+                                               POS + 1, ID, next_id>(fmt);
+    } else {
+      constexpr auto arg_id_result =
+          parse_arg_id<ID>(str.data() + POS + 1, str.data() + str.size());
+      constexpr auto arg_id_end_pos = arg_id_result.arg_id_end - str.data();
+      constexpr char_type c =
+          arg_id_end_pos != str.size() ? str[arg_id_end_pos] : char_type();
+      static_assert(c == '}' || c == ':', "missing '}' in format string");
+      if constexpr (arg_id_result.kind == arg_id_kind::index) {
+        static_assert(
+            ID == manual_indexing_id || ID == 0,
+            "cannot switch from automatic to manual argument indexing");
+        constexpr auto arg_index = arg_id_result.arg_id.index;
+        return parse_replacement_field_then_tail<get_type<arg_index, Args>,
+                                                 Args, arg_id_end_pos,
+                                                 arg_index, manual_indexing_id>(
+            fmt);
+      } else if constexpr (arg_id_result.kind == arg_id_kind::name) {
+        constexpr auto arg_index =
+            get_arg_index_by_name(arg_id_result.arg_id.name, Args{});
+        if constexpr (arg_index >= 0) {
+          constexpr auto next_id =
+              ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
+          return parse_replacement_field_then_tail<
+              decltype(get_type<arg_index, Args>::value), Args, arg_id_end_pos,
+              arg_index, next_id>(fmt);
+        } else if constexpr (c == '}') {
+          return parse_tail<Args, arg_id_end_pos + 1, ID>(
+              runtime_named_field<char_type>{arg_id_result.arg_id.name}, fmt);
+        } else if constexpr (c == ':') {
+          return unknown_format();  // no type info for specs parsing
+        }
+      }
+    }
+  } else if constexpr (str[POS] == '}') {
+    if constexpr (POS + 1 == str.size())
+      FMT_THROW(format_error("unmatched '}' in format string"));
+    return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), fmt);
+  } else {
+    constexpr auto end = parse_text(str, POS + 1);
+    if constexpr (end - POS > 1) {
+      return parse_tail<Args, end, ID>(make_text(str, POS, end - POS), fmt);
+    } else {
+      return parse_tail<Args, end, ID>(code_unit<char_type>{str[POS]}, fmt);
+    }
+  }
+}
+
+template <typename... Args, typename S,
+          FMT_ENABLE_IF(is_compiled_string<S>::value)>
+constexpr auto compile(S fmt) {
+  constexpr auto str = basic_string_view<typename S::char_type>(fmt);
+  if constexpr (str.size() == 0) {
+    return detail::make_text(str, 0, 0);
+  } else {
+    constexpr auto result =
+        detail::compile_format_string<detail::type_list<Args...>, 0, 0>(fmt);
+    return result;
+  }
+}
+#endif  // defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+}  // namespace detail
+
+FMT_BEGIN_EXPORT
+
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+
+template <typename CompiledFormat, typename... Args,
+          typename Char = typename CompiledFormat::char_type,
+          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
+FMT_INLINE std::basic_string<Char> format(const CompiledFormat& cf,
+                                          const Args&... args) {
+  auto s = std::basic_string<Char>();
+  cf.format(std::back_inserter(s), args...);
+  return s;
+}
+
+template <typename OutputIt, typename CompiledFormat, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
+constexpr FMT_INLINE OutputIt format_to(OutputIt out, const CompiledFormat& cf,
+                                        const Args&... args) {
+  return cf.format(out, args...);
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(is_compiled_string<S>::value)>
+FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
+                                                           Args&&... args) {
+  if constexpr (std::is_same<typename S::char_type, char>::value) {
+    constexpr auto str = basic_string_view<typename S::char_type>(S());
+    if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}') {
+      const auto& first = detail::first(args...);
+      if constexpr (detail::is_named_arg<
+                        remove_cvref_t<decltype(first)>>::value) {
+        return fmt::to_string(first.value);
+      } else {
+        return fmt::to_string(first);
+      }
+    }
+  }
+  constexpr auto compiled = detail::compile<Args...>(S());
+  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
+                             detail::unknown_format>()) {
+    return fmt::format(
+        static_cast<basic_string_view<typename S::char_type>>(S()),
+        std::forward<Args>(args)...);
+  } else {
+    return fmt::format(compiled, std::forward<Args>(args)...);
+  }
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          FMT_ENABLE_IF(is_compiled_string<S>::value)>
+FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) {
+  constexpr auto compiled = detail::compile<Args...>(S());
+  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
+                             detail::unknown_format>()) {
+    return fmt::format_to(
+        out, static_cast<basic_string_view<typename S::char_type>>(S()),
+        std::forward<Args>(args)...);
+  } else {
+    return fmt::format_to(out, compiled, std::forward<Args>(args)...);
+  }
+}
+#endif
+
+template <typename OutputIt, typename S, typename... Args,
+          FMT_ENABLE_IF(is_compiled_string<S>::value)>
+auto format_to_n(OutputIt out, size_t n, const S& fmt, Args&&... args)
+    -> format_to_n_result<OutputIt> {
+  using traits = detail::fixed_buffer_traits;
+  auto buf = detail::iterator_buffer<OutputIt, char, traits>(out, n);
+  fmt::format_to(std::back_inserter(buf), fmt, std::forward<Args>(args)...);
+  return {buf.out(), buf.count()};
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(is_compiled_string<S>::value)>
+FMT_CONSTEXPR20 auto formatted_size(const S& fmt, const Args&... args)
+    -> size_t {
+  auto buf = detail::counting_buffer<>();
+  fmt::format_to(appender(buf), fmt, args...);
+  return buf.count();
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(is_compiled_string<S>::value)>
+void print(std::FILE* f, const S& fmt, const Args&... args) {
+  auto buf = memory_buffer();
+  fmt::format_to(appender(buf), fmt, args...);
+  detail::print(f, {buf.data(), buf.size()});
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(is_compiled_string<S>::value)>
+void print(const S& fmt, const Args&... args) {
+  print(stdout, fmt, args...);
+}
+
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+inline namespace literals {
+template <detail::fixed_string Str> constexpr auto operator""_cf() {
+  return FMT_COMPILE(Str.data);
+}
+}  // namespace literals
+#endif
+
+FMT_END_EXPORT
+FMT_END_NAMESPACE
+
+#endif  // FMT_COMPILE_H_

src/3rdparty/fmt/format-inl.h

@@ -8,36 +8,36 @@
 #ifndef FMT_FORMAT_INL_H_
 #define FMT_FORMAT_INL_H_
 
-#include <algorithm>
-#include <cerrno>  // errno
-#include <climits>
-#include <cmath>
-#include <exception>
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-#  include <locale>
+#ifndef FMT_MODULE
+#  include <algorithm>
+#  include <cerrno>  // errno
+#  include <climits>
+#  include <cmath>
+#  include <exception>
 #endif
 
-#if defined(_WIN32) && !defined(FMT_WINDOWS_NO_WCHAR)
+#if defined(_WIN32) && !defined(FMT_USE_WRITE_CONSOLE)
 #  include <io.h>  // _isatty
 #endif
 
 #include "format.h"
 
+#if FMT_USE_LOCALE
+#  include <locale>
+#endif
+
+#ifndef FMT_FUNC
+#  define FMT_FUNC
+#endif
+
 FMT_BEGIN_NAMESPACE
 namespace detail {
 
 FMT_FUNC void assert_fail(const char* file, int line, const char* message) {
   // Use unchecked std::fprintf to avoid triggering another assertion when
-  // writing to stderr fails
-  std::fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message);
-  // Chosen instead of std::abort to satisfy Clang in CUDA mode during device
-  // code pass.
-  std::terminate();
-}
-
-FMT_FUNC void throw_format_error(const char* message) {
-  FMT_THROW(format_error(message));
+  // writing to stderr fails.
+  fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message);
+  abort();
 }
 
 FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
@@ -56,89 +56,105 @@ FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
     ++error_code_size;
   }
   error_code_size += detail::to_unsigned(detail::count_digits(abs_value));
-  auto it = buffer_appender<char>(out);
+  auto it = appender(out);
   if (message.size() <= inline_buffer_size - error_code_size)
     fmt::format_to(it, FMT_STRING("{}{}"), message, SEP);
   fmt::format_to(it, FMT_STRING("{}{}"), ERROR_STR, error_code);
   FMT_ASSERT(out.size() <= inline_buffer_size, "");
 }
 
-FMT_FUNC void report_error(format_func func, int error_code,
-                           const char* message) noexcept {
+FMT_FUNC void do_report_error(format_func func, int error_code,
+                              const char* message) noexcept {
   memory_buffer full_message;
   func(full_message, error_code, message);
-  // Don't use fwrite_fully because the latter may throw.
+  // Don't use fwrite_all because the latter may throw.
   if (std::fwrite(full_message.data(), full_message.size(), 1, stderr) > 0)
     std::fputc('\n', stderr);
 }
 
 // A wrapper around fwrite that throws on error.
-inline void fwrite_fully(const void* ptr, size_t count, FILE* stream) {
+inline void fwrite_all(const void* ptr, size_t count, FILE* stream) {
   size_t written = std::fwrite(ptr, 1, count, stream);
   if (written < count)
     FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
 }
 
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+#if FMT_USE_LOCALE
+using std::locale;
+using std::numpunct;
+using std::use_facet;
+
 template <typename Locale>
 locale_ref::locale_ref(const Locale& loc) : locale_(&loc) {
-  static_assert(std::is_same<Locale, std::locale>::value, "");
+  static_assert(std::is_same<Locale, locale>::value, "");
 }
+#else
+struct locale {};
+template <typename Char> struct numpunct {
+  auto grouping() const -> std::string { return "\03"; }
+  auto thousands_sep() const -> Char { return ','; }
+  auto decimal_point() const -> Char { return '.'; }
+};
+template <typename Facet> Facet use_facet(locale) { return {}; }
+#endif  // FMT_USE_LOCALE
 
 template <typename Locale> auto locale_ref::get() const -> Locale {
-  static_assert(std::is_same<Locale, std::locale>::value, "");
-  return locale_ ? *static_cast<const std::locale*>(locale_) : std::locale();
+  static_assert(std::is_same<Locale, locale>::value, "");
+#if FMT_USE_LOCALE
+  if (locale_) return *static_cast<const locale*>(locale_);
+#endif
+  return locale();
 }
 
 template <typename Char>
 FMT_FUNC auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char> {
-  auto& facet = std::use_facet<std::numpunct<Char>>(loc.get<std::locale>());
+  auto&& facet = use_facet<numpunct<Char>>(loc.get<locale>());
   auto grouping = facet.grouping();
   auto thousands_sep = grouping.empty() ? Char() : facet.thousands_sep();
   return {std::move(grouping), thousands_sep};
 }
 template <typename Char>
 FMT_FUNC auto decimal_point_impl(locale_ref loc) -> Char {
-  return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>())
-      .decimal_point();
+  return use_facet<numpunct<Char>>(loc.get<locale>()).decimal_point();
 }
-#else
-template <typename Char>
-FMT_FUNC auto thousands_sep_impl(locale_ref) -> thousands_sep_result<Char> {
-  return {"\03", FMT_STATIC_THOUSANDS_SEPARATOR};
-}
-template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref) {
-  return '.';
-}
-#endif
 
+#if FMT_USE_LOCALE
 FMT_FUNC auto write_loc(appender out, loc_value value,
-                        const format_specs<>& specs, locale_ref loc) -> bool {
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+                        const format_specs& specs, locale_ref loc) -> bool {
   auto locale = loc.get<std::locale>();
   // We cannot use the num_put<char> facet because it may produce output in
   // a wrong encoding.
   using facet = format_facet<std::locale>;
   if (std::has_facet<facet>(locale))
-    return std::use_facet<facet>(locale).put(out, value, specs);
+    return use_facet<facet>(locale).put(out, value, specs);
   return facet(locale).put(out, value, specs);
-#endif
-  return false;
 }
+#endif
 }  // namespace detail
 
+FMT_FUNC void report_error(const char* message) {
+#if FMT_USE_EXCEPTIONS
+  // Use FMT_THROW instead of throw to avoid bogus unreachable code warnings
+  // from MSVC.
+  FMT_THROW(format_error(message));
+#else
+  fputs(message, stderr);
+  abort();
+#endif
+}
+
 template <typename Locale> typename Locale::id format_facet<Locale>::id;
 
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
 template <typename Locale> format_facet<Locale>::format_facet(Locale& loc) {
-  auto& numpunct = std::use_facet<std::numpunct<char>>(loc);
-  grouping_ = numpunct.grouping();
-  if (!grouping_.empty()) separator_ = std::string(1, numpunct.thousands_sep());
+  auto& np = detail::use_facet<detail::numpunct<char>>(loc);
+  grouping_ = np.grouping();
+  if (!grouping_.empty()) separator_ = std::string(1, np.thousands_sep());
 }
 
+#if FMT_USE_LOCALE
 template <>
 FMT_API FMT_FUNC auto format_facet<std::locale>::do_put(
-    appender out, loc_value val, const format_specs<>& specs) const -> bool {
+    appender out, loc_value val, const format_specs& specs) const -> bool {
   return val.visit(
       detail::loc_writer<>{out, specs, separator_, grouping_, decimal_point_});
 }
@@ -1411,7 +1427,7 @@ FMT_FUNC void format_system_error(detail::buffer<char>& out, int error_code,
                                   const char* message) noexcept {
   FMT_TRY {
     auto ec = std::error_code(error_code, std::generic_category());
-    write(std::back_inserter(out), std::system_error(ec, message).what());
+    detail::write(appender(out), std::system_error(ec, message).what());
     return;
   }
   FMT_CATCH(...) {}
@@ -1420,7 +1436,7 @@ FMT_FUNC void format_system_error(detail::buffer<char>& out, int error_code,
 
 FMT_FUNC void report_system_error(int error_code,
                                   const char* message) noexcept {
-  report_error(format_system_error, error_code, message);
+  do_report_error(format_system_error, error_code, message);
 }
 
 FMT_FUNC auto vformat(string_view fmt, format_args args) -> std::string {
@@ -1432,7 +1448,251 @@ FMT_FUNC auto vformat(string_view fmt, format_args args) -> std::string {
 }
 
 namespace detail {
-#if !defined(_WIN32) || defined(FMT_WINDOWS_NO_WCHAR)
+
+FMT_FUNC void vformat_to(buffer<char>& buf, string_view fmt, format_args args,
+                         locale_ref loc) {
+  auto out = appender(buf);
+  if (fmt.size() == 2 && equal2(fmt.data(), "{}"))
+    return args.get(0).visit(default_arg_formatter<char>{out});
+  parse_format_string(
+      fmt, format_handler<char>{parse_context<char>(fmt), {out, args, loc}});
+}
+
+template <typename T> struct span {
+  T* data;
+  size_t size;
+};
+
+template <typename F> auto flockfile(F* f) -> decltype(_lock_file(f)) {
+  _lock_file(f);
+}
+template <typename F> auto funlockfile(F* f) -> decltype(_unlock_file(f)) {
+  _unlock_file(f);
+}
+
+#ifndef getc_unlocked
+template <typename F> auto getc_unlocked(F* f) -> decltype(_fgetc_nolock(f)) {
+  return _fgetc_nolock(f);
+}
+#endif
+
+template <typename F = FILE, typename Enable = void>
+struct has_flockfile : std::false_type {};
+
+template <typename F>
+struct has_flockfile<F, void_t<decltype(flockfile(&std::declval<F&>()))>>
+    : std::true_type {};
+
+// A FILE wrapper. F is FILE defined as a template parameter to make system API
+// detection work.
+template <typename F> class file_base {
+ public:
+  F* file_;
+
+ public:
+  file_base(F* file) : file_(file) {}
+  operator F*() const { return file_; }
+
+  // Reads a code unit from the stream.
+  auto get() -> int {
+    int result = getc_unlocked(file_);
+    if (result == EOF && ferror(file_) != 0)
+      FMT_THROW(system_error(errno, FMT_STRING("getc failed")));
+    return result;
+  }
+
+  // Puts the code unit back into the stream buffer.
+  void unget(char c) {
+    if (ungetc(c, file_) == EOF)
+      FMT_THROW(system_error(errno, FMT_STRING("ungetc failed")));
+  }
+
+  void flush() { fflush(this->file_); }
+};
+
+// A FILE wrapper for glibc.
+template <typename F> class glibc_file : public file_base<F> {
+ private:
+  enum {
+    line_buffered = 0x200,  // _IO_LINE_BUF
+    unbuffered = 2          // _IO_UNBUFFERED
+  };
+
+ public:
+  using file_base<F>::file_base;
+
+  auto is_buffered() const -> bool {
+    return (this->file_->_flags & unbuffered) == 0;
+  }
+
+  void init_buffer() {
+    if (this->file_->_IO_write_ptr) return;
+    // Force buffer initialization by placing and removing a char in a buffer.
+    assume(this->file_->_IO_write_ptr >= this->file_->_IO_write_end);
+    putc_unlocked(0, this->file_);
+    --this->file_->_IO_write_ptr;
+  }
+
+  // Returns the file's read buffer.
+  auto get_read_buffer() const -> span<const char> {
+    auto ptr = this->file_->_IO_read_ptr;
+    return {ptr, to_unsigned(this->file_->_IO_read_end - ptr)};
+  }
+
+  // Returns the file's write buffer.
+  auto get_write_buffer() const -> span<char> {
+    auto ptr = this->file_->_IO_write_ptr;
+    return {ptr, to_unsigned(this->file_->_IO_buf_end - ptr)};
+  }
+
+  void advance_write_buffer(size_t size) { this->file_->_IO_write_ptr += size; }
+
+  bool needs_flush() const {
+    if ((this->file_->_flags & line_buffered) == 0) return false;
+    char* end = this->file_->_IO_write_end;
+    return memchr(end, '\n', to_unsigned(this->file_->_IO_write_ptr - end));
+  }
+
+  void flush() { fflush_unlocked(this->file_); }
+};
+
+// A FILE wrapper for Apple's libc.
+template <typename F> class apple_file : public file_base<F> {
+ private:
+  enum {
+    line_buffered = 1,  // __SNBF
+    unbuffered = 2      // __SLBF
+  };
+
+ public:
+  using file_base<F>::file_base;
+
+  auto is_buffered() const -> bool {
+    return (this->file_->_flags & unbuffered) == 0;
+  }
+
+  void init_buffer() {
+    if (this->file_->_p) return;
+    // Force buffer initialization by placing and removing a char in a buffer.
+    putc_unlocked(0, this->file_);
+    --this->file_->_p;
+    ++this->file_->_w;
+  }
+
+  auto get_read_buffer() const -> span<const char> {
+    return {reinterpret_cast<char*>(this->file_->_p),
+            to_unsigned(this->file_->_r)};
+  }
+
+  auto get_write_buffer() const -> span<char> {
+    return {reinterpret_cast<char*>(this->file_->_p),
+            to_unsigned(this->file_->_bf._base + this->file_->_bf._size -
+                        this->file_->_p)};
+  }
+
+  void advance_write_buffer(size_t size) {
+    this->file_->_p += size;
+    this->file_->_w -= size;
+  }
+
+  bool needs_flush() const {
+    if ((this->file_->_flags & line_buffered) == 0) return false;
+    return memchr(this->file_->_p + this->file_->_w, '\n',
+                  to_unsigned(-this->file_->_w));
+  }
+};
+
+// A fallback FILE wrapper.
+template <typename F> class fallback_file : public file_base<F> {
+ private:
+  char next_;  // The next unconsumed character in the buffer.
+  bool has_next_ = false;
+
+ public:
+  using file_base<F>::file_base;
+
+  auto is_buffered() const -> bool { return false; }
+  auto needs_flush() const -> bool { return false; }
+  void init_buffer() {}
+
+  auto get_read_buffer() const -> span<const char> {
+    return {&next_, has_next_ ? 1u : 0u};
+  }
+
+  auto get_write_buffer() const -> span<char> { return {nullptr, 0}; }
+
+  void advance_write_buffer(size_t) {}
+
+  auto get() -> int {
+    has_next_ = false;
+    return file_base<F>::get();
+  }
+
+  void unget(char c) {
+    file_base<F>::unget(c);
+    next_ = c;
+    has_next_ = true;
+  }
+};
+
+#ifndef FMT_USE_FALLBACK_FILE
+#  define FMT_USE_FALLBACK_FILE 0
+#endif
+
+template <typename F,
+          FMT_ENABLE_IF(sizeof(F::_p) != 0 && !FMT_USE_FALLBACK_FILE)>
+auto get_file(F* f, int) -> apple_file<F> {
+  return f;
+}
+template <typename F,
+          FMT_ENABLE_IF(sizeof(F::_IO_read_ptr) != 0 && !FMT_USE_FALLBACK_FILE)>
+inline auto get_file(F* f, int) -> glibc_file<F> {
+  return f;
+}
+
+inline auto get_file(FILE* f, ...) -> fallback_file<FILE> { return f; }
+
+using file_ref = decltype(get_file(static_cast<FILE*>(nullptr), 0));
+
+template <typename F = FILE, typename Enable = void>
+class file_print_buffer : public buffer<char> {
+ public:
+  explicit file_print_buffer(F*) : buffer(nullptr, size_t()) {}
+};
+
+template <typename F>
+class file_print_buffer<F, enable_if_t<has_flockfile<F>::value>>
+    : public buffer<char> {
+ private:
+  file_ref file_;
+
+  static void grow(buffer<char>& base, size_t) {
+    auto& self = static_cast<file_print_buffer&>(base);
+    self.file_.advance_write_buffer(self.size());
+    if (self.file_.get_write_buffer().size == 0) self.file_.flush();
+    auto buf = self.file_.get_write_buffer();
+    FMT_ASSERT(buf.size > 0, "");
+    self.set(buf.data, buf.size);
+    self.clear();
+  }
+
+ public:
+  explicit file_print_buffer(F* f) : buffer(grow, size_t()), file_(f) {
+    flockfile(f);
+    file_.init_buffer();
+    auto buf = file_.get_write_buffer();
+    set(buf.data, buf.size);
+  }
+  ~file_print_buffer() {
+    file_.advance_write_buffer(size());
+    bool flush = file_.needs_flush();
+    F* f = file_;    // Make funlockfile depend on the template parameter F
+    funlockfile(f);  // for the system API detection to work.
+    if (flush) fflush(file_);
+  }
+};
+
+#if !defined(_WIN32) || defined(FMT_USE_WRITE_CONSOLE)
 FMT_FUNC auto write_console(int, string_view) -> bool { return false; }
 #else
 using dword = conditional_t<sizeof(long) == 4, unsigned long, unsigned>;
@@ -1448,31 +1708,47 @@ FMT_FUNC bool write_console(int fd, string_view text) {
 
 #ifdef _WIN32
 // Print assuming legacy (non-Unicode) encoding.
-FMT_FUNC void vprint_mojibake(std::FILE* f, string_view fmt, format_args args) {
+FMT_FUNC void vprint_mojibake(std::FILE* f, string_view fmt, format_args args,
+                              bool newline) {
   auto buffer = memory_buffer();
   detail::vformat_to(buffer, fmt, args);
-  fwrite_fully(buffer.data(), buffer.size(), f);
+  if (newline) buffer.push_back('\n');
+  fwrite_all(buffer.data(), buffer.size(), f);
 }
 #endif
 
 FMT_FUNC void print(std::FILE* f, string_view text) {
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(FMT_USE_WRITE_CONSOLE)
   int fd = _fileno(f);
   if (_isatty(fd)) {
     std::fflush(f);
     if (write_console(fd, text)) return;
   }
 #endif
-  fwrite_fully(text.data(), text.size(), f);
+  fwrite_all(text.data(), text.size(), f);
 }
 }  // namespace detail
 
-FMT_FUNC void vprint(std::FILE* f, string_view fmt, format_args args) {
+FMT_FUNC void vprint_buffered(std::FILE* f, string_view fmt, format_args args) {
   auto buffer = memory_buffer();
   detail::vformat_to(buffer, fmt, args);
   detail::print(f, {buffer.data(), buffer.size()});
 }
 
+FMT_FUNC void vprint(std::FILE* f, string_view fmt, format_args args) {
+  if (!detail::file_ref(f).is_buffered() || !detail::has_flockfile<>())
+    return vprint_buffered(f, fmt, args);
+  auto&& buffer = detail::file_print_buffer<>(f);
+  return detail::vformat_to(buffer, fmt, args);
+}
+
+FMT_FUNC void vprintln(std::FILE* f, string_view fmt, format_args args) {
+  auto buffer = memory_buffer();
+  detail::vformat_to(buffer, fmt, args);
+  buffer.push_back('\n');
+  detail::print(f, {buffer.data(), buffer.size()});
+}
+
 FMT_FUNC void vprint(string_view fmt, format_args args) {
   vprint(stdout, fmt, args);
 }

src/3rdparty/fmt/format.cc

@@ -0,0 +1,46 @@
+// Formatting library for C++
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "format-inl.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+template FMT_API auto dragonbox::to_decimal(float x) noexcept
+    -> dragonbox::decimal_fp<float>;
+template FMT_API auto dragonbox::to_decimal(double x) noexcept
+    -> dragonbox::decimal_fp<double>;
+
+#if FMT_USE_LOCALE
+// DEPRECATED! locale_ref in the detail namespace
+template FMT_API locale_ref::locale_ref(const std::locale& loc);
+template FMT_API auto locale_ref::get<std::locale>() const -> std::locale;
+#endif
+
+// Explicit instantiations for char.
+
+template FMT_API auto thousands_sep_impl(locale_ref)
+    -> thousands_sep_result<char>;
+template FMT_API auto decimal_point_impl(locale_ref) -> char;
+
+// DEPRECATED!
+template FMT_API void buffer<char>::append(const char*, const char*);
+
+// DEPRECATED!
+template FMT_API void vformat_to(buffer<char>&, string_view,
+                                 typename vformat_args<>::type, locale_ref);
+
+// Explicit instantiations for wchar_t.
+
+template FMT_API auto thousands_sep_impl(locale_ref)
+    -> thousands_sep_result<wchar_t>;
+template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
+
+template FMT_API void buffer<wchar_t>::append(const wchar_t*, const wchar_t*);
+
+}  // namespace detail
+FMT_END_NAMESPACE

src/3rdparty/fmt/os.cc

@@ -0,0 +1,398 @@
+// Formatting library for C++ - optional OS-specific functionality
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+// Disable bogus MSVC warnings.
+#if !defined(_CRT_SECURE_NO_WARNINGS) && defined(_MSC_VER)
+#  define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include "os.h"
+
+#ifndef FMT_MODULE
+#  include <climits>
+
+#  if FMT_USE_FCNTL
+#    include <sys/stat.h>
+#    include <sys/types.h>
+
+#    ifdef _WRS_KERNEL    // VxWorks7 kernel
+#      include <ioLib.h>  // getpagesize
+#    endif
+
+#    ifndef _WIN32
+#      include <unistd.h>
+#    else
+#      ifndef WIN32_LEAN_AND_MEAN
+#        define WIN32_LEAN_AND_MEAN
+#      endif
+#      include <io.h>
+#    endif  // _WIN32
+#  endif    // FMT_USE_FCNTL
+
+#  ifdef _WIN32
+#    include <windows.h>
+#  endif
+#endif
+
+#ifdef _WIN32
+#  ifndef S_IRUSR
+#    define S_IRUSR _S_IREAD
+#  endif
+#  ifndef S_IWUSR
+#    define S_IWUSR _S_IWRITE
+#  endif
+#  ifndef S_IRGRP
+#    define S_IRGRP 0
+#  endif
+#  ifndef S_IWGRP
+#    define S_IWGRP 0
+#  endif
+#  ifndef S_IROTH
+#    define S_IROTH 0
+#  endif
+#  ifndef S_IWOTH
+#    define S_IWOTH 0
+#  endif
+#endif
+
+namespace {
+#ifdef _WIN32
+// Return type of read and write functions.
+using rwresult = int;
+
+// On Windows the count argument to read and write is unsigned, so convert
+// it from size_t preventing integer overflow.
+inline unsigned convert_rwcount(std::size_t count) {
+  return count <= UINT_MAX ? static_cast<unsigned>(count) : UINT_MAX;
+}
+#elif FMT_USE_FCNTL
+// Return type of read and write functions.
+using rwresult = ssize_t;
+
+inline std::size_t convert_rwcount(std::size_t count) { return count; }
+#endif
+}  // namespace
+
+FMT_BEGIN_NAMESPACE
+
+#ifdef _WIN32
+namespace detail {
+
+class system_message {
+  system_message(const system_message&) = delete;
+  void operator=(const system_message&) = delete;
+
+  unsigned long result_;
+  wchar_t* message_;
+
+  static bool is_whitespace(wchar_t c) noexcept {
+    return c == L' ' || c == L'\n' || c == L'\r' || c == L'\t' || c == L'\0';
+  }
+
+ public:
+  explicit system_message(unsigned long error_code)
+      : result_(0), message_(nullptr) {
+    result_ = FormatMessageW(
+        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
+            FORMAT_MESSAGE_IGNORE_INSERTS,
+        nullptr, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+        reinterpret_cast<wchar_t*>(&message_), 0, nullptr);
+    if (result_ != 0) {
+      while (result_ != 0 && is_whitespace(message_[result_ - 1])) {
+        --result_;
+      }
+    }
+  }
+  ~system_message() { LocalFree(message_); }
+  explicit operator bool() const noexcept { return result_ != 0; }
+  operator basic_string_view<wchar_t>() const noexcept {
+    return basic_string_view<wchar_t>(message_, result_);
+  }
+};
+
+class utf8_system_category final : public std::error_category {
+ public:
+  const char* name() const noexcept override { return "system"; }
+  std::string message(int error_code) const override {
+    auto&& msg = system_message(error_code);
+    if (msg) {
+      auto utf8_message = to_utf8<wchar_t>();
+      if (utf8_message.convert(msg)) {
+        return utf8_message.str();
+      }
+    }
+    return "unknown error";
+  }
+};
+
+}  // namespace detail
+
+FMT_API const std::error_category& system_category() noexcept {
+  static const detail::utf8_system_category category;
+  return category;
+}
+
+std::system_error vwindows_error(int err_code, string_view format_str,
+                                 format_args args) {
+  auto ec = std::error_code(err_code, system_category());
+  return std::system_error(ec, vformat(format_str, args));
+}
+
+void detail::format_windows_error(detail::buffer<char>& out, int error_code,
+                                  const char* message) noexcept {
+  FMT_TRY {
+    auto&& msg = system_message(error_code);
+    if (msg) {
+      auto utf8_message = to_utf8<wchar_t>();
+      if (utf8_message.convert(msg)) {
+        fmt::format_to(appender(out), FMT_STRING("{}: {}"), message,
+                       string_view(utf8_message));
+        return;
+      }
+    }
+  }
+  FMT_CATCH(...) {}
+  format_error_code(out, error_code, message);
+}
+
+void report_windows_error(int error_code, const char* message) noexcept {
+  do_report_error(detail::format_windows_error, error_code, message);
+}
+#endif  // _WIN32
+
+buffered_file::~buffered_file() noexcept {
+  if (file_ && FMT_SYSTEM(fclose(file_)) != 0)
+    report_system_error(errno, "cannot close file");
+}
+
+buffered_file::buffered_file(cstring_view filename, cstring_view mode) {
+  FMT_RETRY_VAL(file_, FMT_SYSTEM(fopen(filename.c_str(), mode.c_str())),
+                nullptr);
+  if (!file_)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot open file {}"),
+                           filename.c_str()));
+}
+
+void buffered_file::close() {
+  if (!file_) return;
+  int result = FMT_SYSTEM(fclose(file_));
+  file_ = nullptr;
+  if (result != 0)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot close file")));
+}
+
+int buffered_file::descriptor() const {
+#ifdef FMT_HAS_SYSTEM
+  // fileno is a macro on OpenBSD.
+#  ifdef fileno
+#    undef fileno
+#  endif
+  int fd = FMT_POSIX_CALL(fileno(file_));
+#elif defined(_WIN32)
+  int fd = _fileno(file_);
+#else
+  int fd = fileno(file_);
+#endif
+  if (fd == -1)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot get file descriptor")));
+  return fd;
+}
+
+#if FMT_USE_FCNTL
+#  ifdef _WIN32
+using mode_t = int;
+#  endif
+
+constexpr mode_t default_open_mode =
+    S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
+
+file::file(cstring_view path, int oflag) {
+#  if defined(_WIN32) && !defined(__MINGW32__)
+  fd_ = -1;
+  auto converted = detail::utf8_to_utf16(string_view(path.c_str()));
+  *this = file::open_windows_file(converted.c_str(), oflag);
+#  else
+  FMT_RETRY(fd_, FMT_POSIX_CALL(open(path.c_str(), oflag, default_open_mode)));
+  if (fd_ == -1)
+    FMT_THROW(
+        system_error(errno, FMT_STRING("cannot open file {}"), path.c_str()));
+#  endif
+}
+
+file::~file() noexcept {
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  if (fd_ != -1 && FMT_POSIX_CALL(close(fd_)) != 0)
+    report_system_error(errno, "cannot close file");
+}
+
+void file::close() {
+  if (fd_ == -1) return;
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  int result = FMT_POSIX_CALL(close(fd_));
+  fd_ = -1;
+  if (result != 0)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot close file")));
+}
+
+long long file::size() const {
+#  ifdef _WIN32
+  // Use GetFileSize instead of GetFileSizeEx for the case when _WIN32_WINNT
+  // is less than 0x0500 as is the case with some default MinGW builds.
+  // Both functions support large file sizes.
+  DWORD size_upper = 0;
+  HANDLE handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd_));
+  DWORD size_lower = FMT_SYSTEM(GetFileSize(handle, &size_upper));
+  if (size_lower == INVALID_FILE_SIZE) {
+    DWORD error = GetLastError();
+    if (error != NO_ERROR)
+      FMT_THROW(windows_error(GetLastError(), "cannot get file size"));
+  }
+  unsigned long long long_size = size_upper;
+  return (long_size << sizeof(DWORD) * CHAR_BIT) | size_lower;
+#  else
+  using Stat = struct stat;
+  Stat file_stat = Stat();
+  if (FMT_POSIX_CALL(fstat(fd_, &file_stat)) == -1)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot get file attributes")));
+  static_assert(sizeof(long long) >= sizeof(file_stat.st_size),
+                "return type of file::size is not large enough");
+  return file_stat.st_size;
+#  endif
+}
+
+std::size_t file::read(void* buffer, std::size_t count) {
+  rwresult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(read(fd_, buffer, convert_rwcount(count))));
+  if (result < 0)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot read from file")));
+  return detail::to_unsigned(result);
+}
+
+std::size_t file::write(const void* buffer, std::size_t count) {
+  rwresult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count))));
+  if (result < 0)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
+  return detail::to_unsigned(result);
+}
+
+file file::dup(int fd) {
+  // Don't retry as dup doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009695399/functions/dup.html
+  int new_fd = FMT_POSIX_CALL(dup(fd));
+  if (new_fd == -1)
+    FMT_THROW(system_error(
+        errno, FMT_STRING("cannot duplicate file descriptor {}"), fd));
+  return file(new_fd);
+}
+
+void file::dup2(int fd) {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1) {
+    FMT_THROW(system_error(
+        errno, FMT_STRING("cannot duplicate file descriptor {} to {}"), fd_,
+        fd));
+  }
+}
+
+void file::dup2(int fd, std::error_code& ec) noexcept {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1) ec = std::error_code(errno, std::generic_category());
+}
+
+buffered_file file::fdopen(const char* mode) {
+// Don't retry as fdopen doesn't return EINTR.
+#  if defined(__MINGW32__) && defined(_POSIX_)
+  FILE* f = ::fdopen(fd_, mode);
+#  else
+  FILE* f = FMT_POSIX_CALL(fdopen(fd_, mode));
+#  endif
+  if (!f) {
+    FMT_THROW(system_error(
+        errno, FMT_STRING("cannot associate stream with file descriptor")));
+  }
+  buffered_file bf(f);
+  fd_ = -1;
+  return bf;
+}
+
+#  if defined(_WIN32) && !defined(__MINGW32__)
+file file::open_windows_file(wcstring_view path, int oflag) {
+  int fd = -1;
+  auto err = _wsopen_s(&fd, path.c_str(), oflag, _SH_DENYNO, default_open_mode);
+  if (fd == -1) {
+    FMT_THROW(system_error(err, FMT_STRING("cannot open file {}"),
+                           detail::to_utf8<wchar_t>(path.c_str()).c_str()));
+  }
+  return file(fd);
+}
+#  endif
+
+pipe::pipe() {
+  int fds[2] = {};
+#  ifdef _WIN32
+  // Make the default pipe capacity same as on Linux 2.6.11+.
+  enum { DEFAULT_CAPACITY = 65536 };
+  int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY));
+#  else
+  // Don't retry as the pipe function doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html
+  int result = FMT_POSIX_CALL(pipe(fds));
+#  endif
+  if (result != 0)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot create pipe")));
+  // The following assignments don't throw.
+  read_end = file(fds[0]);
+  write_end = file(fds[1]);
+}
+
+#  if !defined(__MSDOS__)
+long getpagesize() {
+#    ifdef _WIN32
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+  return si.dwPageSize;
+#    else
+#      ifdef _WRS_KERNEL
+  long size = FMT_POSIX_CALL(getpagesize());
+#      else
+  long size = FMT_POSIX_CALL(sysconf(_SC_PAGESIZE));
+#      endif
+
+  if (size < 0)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot get memory page size")));
+  return size;
+#    endif
+}
+#  endif
+
+void ostream::grow(buffer<char>& buf, size_t) {
+  if (buf.size() == buf.capacity()) static_cast<ostream&>(buf).flush();
+}
+
+ostream::ostream(cstring_view path, const detail::ostream_params& params)
+    : buffer<char>(grow), file_(path, params.oflag) {
+  set(new char[params.buffer_size], params.buffer_size);
+}
+
+ostream::ostream(ostream&& other) noexcept
+    : buffer<char>(grow, other.data(), other.size(), other.capacity()),
+      file_(std::move(other.file_)) {
+  other.clear();
+  other.set(nullptr, 0);
+}
+
+ostream::~ostream() {
+  flush();
+  delete[] data();
+}
+#endif  // FMT_USE_FCNTL
+FMT_END_NAMESPACE

src/3rdparty/fmt/os.h

@@ -0,0 +1,427 @@
+// Formatting library for C++ - optional OS-specific functionality
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_OS_H_
+#define FMT_OS_H_
+
+#include "format.h"
+
+#ifndef FMT_MODULE
+#  include <cerrno>
+#  include <cstddef>
+#  include <cstdio>
+#  include <system_error>  // std::system_error
+
+#  if FMT_HAS_INCLUDE(<xlocale.h>)
+#    include <xlocale.h>  // LC_NUMERIC_MASK on macOS
+#  endif
+#endif  // FMT_MODULE
+
+#ifndef FMT_USE_FCNTL
+// UWP doesn't provide _pipe.
+#  if FMT_HAS_INCLUDE("winapifamily.h")
+#    include <winapifamily.h>
+#  endif
+#  if (FMT_HAS_INCLUDE(<fcntl.h>) || defined(__APPLE__) || \
+       defined(__linux__)) &&                              \
+      (!defined(WINAPI_FAMILY) ||                          \
+       (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
+#    include <fcntl.h>  // for O_RDONLY
+#    define FMT_USE_FCNTL 1
+#  else
+#    define FMT_USE_FCNTL 0
+#  endif
+#endif
+
+#ifndef FMT_POSIX
+#  if defined(_WIN32) && !defined(__MINGW32__)
+// Fix warnings about deprecated symbols.
+#    define FMT_POSIX(call) _##call
+#  else
+#    define FMT_POSIX(call) call
+#  endif
+#endif
+
+// Calls to system functions are wrapped in FMT_SYSTEM for testability.
+#ifdef FMT_SYSTEM
+#  define FMT_HAS_SYSTEM
+#  define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
+#else
+#  define FMT_SYSTEM(call) ::call
+#  ifdef _WIN32
+// Fix warnings about deprecated symbols.
+#    define FMT_POSIX_CALL(call) ::_##call
+#  else
+#    define FMT_POSIX_CALL(call) ::call
+#  endif
+#endif
+
+// Retries the expression while it evaluates to error_result and errno
+// equals to EINTR.
+#ifndef _WIN32
+#  define FMT_RETRY_VAL(result, expression, error_result) \
+    do {                                                  \
+      (result) = (expression);                            \
+    } while ((result) == (error_result) && errno == EINTR)
+#else
+#  define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
+#endif
+
+#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
+
+FMT_BEGIN_NAMESPACE
+FMT_BEGIN_EXPORT
+
+/**
+ * A reference to a null-terminated string. It can be constructed from a C
+ * string or `std::string`.
+ *
+ * You can use one of the following type aliases for common character types:
+ *
+ * +---------------+-----------------------------+
+ * | Type          | Definition                  |
+ * +===============+=============================+
+ * | cstring_view  | basic_cstring_view<char>    |
+ * +---------------+-----------------------------+
+ * | wcstring_view | basic_cstring_view<wchar_t> |
+ * +---------------+-----------------------------+
+ *
+ * This class is most useful as a parameter type for functions that wrap C APIs.
+ */
+template <typename Char> class basic_cstring_view {
+ private:
+  const Char* data_;
+
+ public:
+  /// Constructs a string reference object from a C string.
+  basic_cstring_view(const Char* s) : data_(s) {}
+
+  /// Constructs a string reference from an `std::string` object.
+  basic_cstring_view(const std::basic_string<Char>& s) : data_(s.c_str()) {}
+
+  /// Returns the pointer to a C string.
+  auto c_str() const -> const Char* { return data_; }
+};
+
+using cstring_view = basic_cstring_view<char>;
+using wcstring_view = basic_cstring_view<wchar_t>;
+
+#ifdef _WIN32
+FMT_API const std::error_category& system_category() noexcept;
+
+namespace detail {
+FMT_API void format_windows_error(buffer<char>& out, int error_code,
+                                  const char* message) noexcept;
+}
+
+FMT_API std::system_error vwindows_error(int error_code, string_view fmt,
+                                         format_args args);
+
+/**
+ * Constructs a `std::system_error` object with the description of the form
+ *
+ *     <message>: <system-message>
+ *
+ * where `<message>` is the formatted message and `<system-message>` is the
+ * system message corresponding to the error code.
+ * `error_code` is a Windows error code as given by `GetLastError`.
+ * If `error_code` is not a valid error code such as -1, the system message
+ * will look like "error -1".
+ *
+ * **Example**:
+ *
+ *     // This throws a system_error with the description
+ *     //   cannot open file 'madeup': The system cannot find the file
+ * specified.
+ *     // or similar (system message may vary).
+ *     const char *filename = "madeup";
+ *     LPOFSTRUCT of = LPOFSTRUCT();
+ *     HFILE file = OpenFile(filename, &of, OF_READ);
+ *     if (file == HFILE_ERROR) {
+ *       throw fmt::windows_error(GetLastError(),
+ *                                "cannot open file '{}'", filename);
+ *     }
+ */
+template <typename... T>
+auto windows_error(int error_code, string_view message, const T&... args)
+    -> std::system_error {
+  return vwindows_error(error_code, message, vargs<T...>{{args...}});
+}
+
+// Reports a Windows error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_windows_error(int error_code, const char* message) noexcept;
+#else
+inline auto system_category() noexcept -> const std::error_category& {
+  return std::system_category();
+}
+#endif  // _WIN32
+
+// std::system is not available on some platforms such as iOS (#2248).
+#ifdef __OSX__
+template <typename S, typename... Args, typename Char = char_t<S>>
+void say(const S& fmt, Args&&... args) {
+  std::system(format("say \"{}\"", format(fmt, args...)).c_str());
+}
+#endif
+
+// A buffered file.
+class buffered_file {
+ private:
+  FILE* file_;
+
+  friend class file;
+
+  inline explicit buffered_file(FILE* f) : file_(f) {}
+
+ public:
+  buffered_file(const buffered_file&) = delete;
+  void operator=(const buffered_file&) = delete;
+
+  // Constructs a buffered_file object which doesn't represent any file.
+  inline buffered_file() noexcept : file_(nullptr) {}
+
+  // Destroys the object closing the file it represents if any.
+  FMT_API ~buffered_file() noexcept;
+
+ public:
+  inline buffered_file(buffered_file&& other) noexcept : file_(other.file_) {
+    other.file_ = nullptr;
+  }
+
+  inline auto operator=(buffered_file&& other) -> buffered_file& {
+    close();
+    file_ = other.file_;
+    other.file_ = nullptr;
+    return *this;
+  }
+
+  // Opens a file.
+  FMT_API buffered_file(cstring_view filename, cstring_view mode);
+
+  // Closes the file.
+  FMT_API void close();
+
+  // Returns the pointer to a FILE object representing this file.
+  inline auto get() const noexcept -> FILE* { return file_; }
+
+  FMT_API auto descriptor() const -> int;
+
+  template <typename... T>
+  inline void print(string_view fmt, const T&... args) {
+    fmt::vargs<T...> vargs = {{args...}};
+    detail::is_locking<T...>() ? fmt::vprint_buffered(file_, fmt, vargs)
+                               : fmt::vprint(file_, fmt, vargs);
+  }
+};
+
+#if FMT_USE_FCNTL
+
+// A file. Closed file is represented by a file object with descriptor -1.
+// Methods that are not declared with noexcept may throw
+// fmt::system_error in case of failure. Note that some errors such as
+// closing the file multiple times will cause a crash on Windows rather
+// than an exception. You can get standard behavior by overriding the
+// invalid parameter handler with _set_invalid_parameter_handler.
+class FMT_API file {
+ private:
+  int fd_;  // File descriptor.
+
+  // Constructs a file object with a given descriptor.
+  explicit file(int fd) : fd_(fd) {}
+
+  friend struct pipe;
+
+ public:
+  // Possible values for the oflag argument to the constructor.
+  enum {
+    RDONLY = FMT_POSIX(O_RDONLY),  // Open for reading only.
+    WRONLY = FMT_POSIX(O_WRONLY),  // Open for writing only.
+    RDWR = FMT_POSIX(O_RDWR),      // Open for reading and writing.
+    CREATE = FMT_POSIX(O_CREAT),   // Create if the file doesn't exist.
+    APPEND = FMT_POSIX(O_APPEND),  // Open in append mode.
+    TRUNC = FMT_POSIX(O_TRUNC)     // Truncate the content of the file.
+  };
+
+  // Constructs a file object which doesn't represent any file.
+  inline file() noexcept : fd_(-1) {}
+
+  // Opens a file and constructs a file object representing this file.
+  file(cstring_view path, int oflag);
+
+ public:
+  file(const file&) = delete;
+  void operator=(const file&) = delete;
+
+  inline file(file&& other) noexcept : fd_(other.fd_) { other.fd_ = -1; }
+
+  // Move assignment is not noexcept because close may throw.
+  inline auto operator=(file&& other) -> file& {
+    close();
+    fd_ = other.fd_;
+    other.fd_ = -1;
+    return *this;
+  }
+
+  // Destroys the object closing the file it represents if any.
+  ~file() noexcept;
+
+  // Returns the file descriptor.
+  inline auto descriptor() const noexcept -> int { return fd_; }
+
+  // Closes the file.
+  void close();
+
+  // Returns the file size. The size has signed type for consistency with
+  // stat::st_size.
+  auto size() const -> long long;
+
+  // Attempts to read count bytes from the file into the specified buffer.
+  auto read(void* buffer, size_t count) -> size_t;
+
+  // Attempts to write count bytes from the specified buffer to the file.
+  auto write(const void* buffer, size_t count) -> size_t;
+
+  // Duplicates a file descriptor with the dup function and returns
+  // the duplicate as a file object.
+  static auto dup(int fd) -> file;
+
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  void dup2(int fd);
+
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  void dup2(int fd, std::error_code& ec) noexcept;
+
+  // Creates a buffered_file object associated with this file and detaches
+  // this file object from the file.
+  auto fdopen(const char* mode) -> buffered_file;
+
+#  if defined(_WIN32) && !defined(__MINGW32__)
+  // Opens a file and constructs a file object representing this file by
+  // wcstring_view filename. Windows only.
+  static file open_windows_file(wcstring_view path, int oflag);
+#  endif
+};
+
+struct FMT_API pipe {
+  file read_end;
+  file write_end;
+
+  // Creates a pipe setting up read_end and write_end file objects for reading
+  // and writing respectively.
+  pipe();
+};
+
+// Returns the memory page size.
+auto getpagesize() -> long;
+
+namespace detail {
+
+struct buffer_size {
+  constexpr buffer_size() = default;
+  size_t value = 0;
+  FMT_CONSTEXPR auto operator=(size_t val) const -> buffer_size {
+    auto bs = buffer_size();
+    bs.value = val;
+    return bs;
+  }
+};
+
+struct ostream_params {
+  int oflag = file::WRONLY | file::CREATE | file::TRUNC;
+  size_t buffer_size = BUFSIZ > 32768 ? BUFSIZ : 32768;
+
+  constexpr ostream_params() {}
+
+  template <typename... T>
+  ostream_params(T... params, int new_oflag) : ostream_params(params...) {
+    oflag = new_oflag;
+  }
+
+  template <typename... T>
+  ostream_params(T... params, detail::buffer_size bs)
+      : ostream_params(params...) {
+    this->buffer_size = bs.value;
+  }
+
+// Intel has a bug that results in failure to deduce a constructor
+// for empty parameter packs.
+#  if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 2000
+  ostream_params(int new_oflag) : oflag(new_oflag) {}
+  ostream_params(detail::buffer_size bs) : buffer_size(bs.value) {}
+#  endif
+};
+
+}  // namespace detail
+
+FMT_INLINE_VARIABLE constexpr auto buffer_size = detail::buffer_size();
+
+/// A fast buffered output stream for writing from a single thread. Writing from
+/// multiple threads without external synchronization may result in a data race.
+class FMT_API ostream : private detail::buffer<char> {
+ private:
+  file file_;
+
+  ostream(cstring_view path, const detail::ostream_params& params);
+
+  static void grow(buffer<char>& buf, size_t);
+
+ public:
+  ostream(ostream&& other) noexcept;
+  ~ostream();
+
+  operator writer() {
+    detail::buffer<char>& buf = *this;
+    return buf;
+  }
+
+  inline void flush() {
+    if (size() == 0) return;
+    file_.write(data(), size() * sizeof(data()[0]));
+    clear();
+  }
+
+  template <typename... T>
+  friend auto output_file(cstring_view path, T... params) -> ostream;
+
+  inline void close() {
+    flush();
+    file_.close();
+  }
+
+  /// Formats `args` according to specifications in `fmt` and writes the
+  /// output to the file.
+  template <typename... T> void print(format_string<T...> fmt, T&&... args) {
+    vformat_to(appender(*this), fmt.str, vargs<T...>{{args...}});
+  }
+};
+
+/**
+ * Opens a file for writing. Supported parameters passed in `params`:
+ *
+ * - `<integer>`: Flags passed to [open](
+ *   https://pubs.opengroup.org/onlinepubs/007904875/functions/open.html)
+ *   (`file::WRONLY | file::CREATE | file::TRUNC` by default)
+ * - `buffer_size=<integer>`: Output buffer size
+ *
+ * **Example**:
+ *
+ *     auto out = fmt::output_file("guide.txt");
+ *     out.print("Don't {}", "Panic");
+ */
+template <typename... T>
+inline auto output_file(cstring_view path, T... params) -> ostream {
+  return {path, detail::ostream_params(params...)};
+}
+#endif  // FMT_USE_FCNTL
+
+FMT_END_EXPORT
+FMT_END_NAMESPACE
+
+#endif  // FMT_OS_H_