Move extracting linear operations into special class.

src/cs/MonoGame.Extended.Tweening/LinearOperations.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Linq.Expressions;
+
+namespace MonoGame.Extended.Tweening;
+
+public class LinearOperations<T>
+{
+    static LinearOperations()
+    {
+        var a = Expression.Parameter(typeof(T));
+        var b = Expression.Parameter(typeof(T));
+        var c = Expression.Parameter(typeof(float));
+        Add = Expression.Lambda<Func<T, T, T>>(Expression.Add(a, b), a, b).Compile();
+        Subtract = Expression.Lambda<Func<T, T, T>>(Expression.Subtract(a, b), a, b).Compile();
+        Multiply = Expression.Lambda<Func<T, float, T>>(Expression.Multiply(a, c), a, c).Compile();
+    }
+
+    public static Func<T, T, T> Add { get; }
+    public static Func<T, T, T> Subtract { get; }
+    public static Func<T, float, T> Multiply { get; }
+}

src/cs/MonoGame.Extended.Tweening/Tween.cs

@@ -4,9 +4,9 @@ using Microsoft.Xna.Framework;
 namespace MonoGame.Extended.Tweening
 {
     public class Tween<T> : Tween
-        where T : struct 
+        where T : struct
     {
-        internal Tween(object target, float duration, float delay, TweenMember<T> member, T endValue) 
+        internal Tween(object target, float duration, float delay, TweenMember<T> member, T endValue)
             : base(target, duration, delay)
         {
             Member = member;
@@ -23,12 +23,12 @@ namespace MonoGame.Extended.Tweening
         protected override void Initialize()
         {
             _startValue = Member.Value;
-            _range = TweenMember<T>.Subtract(_endValue, _startValue);
+            _range = LinearOperations<T>.Subtract(_endValue, _startValue);
         }
 
         protected override void Interpolate(float n)
         {
-            var value = TweenMember<T>.Add(_startValue, TweenMember<T>.Multiply(_range, n));
+            var value = LinearOperations<T>.Add(_startValue, LinearOperations<T>.Multiply(_range, n));
             Member.Value = value;
         }
 
@@ -189,4 +189,4 @@ namespace MonoGame.Extended.Tweening
         }
 
     }
-}
+}

src/cs/MonoGame.Extended.Tweening/TweenMember.cs

@@ -16,29 +16,15 @@ namespace MonoGame.Extended.Tweening
     }
 
     public abstract class TweenMember<T> : TweenMember
-        where T : struct 
+        where T : struct
     {
-        static TweenMember()
-        {
-            var a = Expression.Parameter(typeof(T));
-            var b = Expression.Parameter(typeof(T));
-            var c = Expression.Parameter(typeof(float));
-            Add = Expression.Lambda<Func<T, T, T>>(Expression.Add(a, b), a, b).Compile();
-            Subtract = Expression.Lambda<Func<T, T, T>>(Expression.Subtract(a, b), a, b).Compile();
-            Multiply = Expression.Lambda<Func<T, float, T>>(Expression.Multiply(a, c), a, c).Compile();
-        }
-
-        public static Func<T, T, T> Add { get; }
-        public static Func<T, T, T> Subtract { get; }
-        public static Func<T, float, T> Multiply { get; }
-
         protected TweenMember(object target, Func<object, object> getMethod, Action<object, object> setMethod)
             : base(target)
         {
             _getMethod = getMethod;
-            _setMethod = setMethod; 
+            _setMethod = setMethod;
         }
-        
+
         private readonly Func<object, object> _getMethod;
         private readonly Action<object, object> _setMethod;
 
@@ -48,4 +34,4 @@ namespace MonoGame.Extended.Tweening
             set { _setMethod(Target, value); }
         }
     }
-}
+}