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Alexandru Victor Macocian
2023-05-14 22:46:38 +02:00
committed by GitHub
parent a25f2e5acb
commit de08c0e3b0
13 changed files with 234 additions and 107 deletions
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SystemExtensions.NetStandard/Extensions/Optional.cs
+18 -18
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@@ -7,7 +7,7 @@ public static class Optional
return new Optional<T>.None();
}
public static Optional<T> FromValue<T>(T value)
public static Optional<T> FromValue<T>(T? value)
{
if (value == null)
{
@@ -27,7 +27,7 @@ public abstract class Optional<T> : IEquatable<Optional<T>>
private T Value { get; }
public T ExtractValue()
public T? ExtractValue()
{
if (this is None)
{
@@ -38,7 +38,7 @@ public abstract class Optional<T> : IEquatable<Optional<T>>
return this.Value;
}
}
public Optional<T> Do(Action<T> onSome, Action onNone)
public Optional<T> Do(Action<T>? onSome, Action? onNone)
{
if (onSome is null)
{
@@ -61,7 +61,7 @@ public abstract class Optional<T> : IEquatable<Optional<T>>
return this;
}
public Optional<T> DoAny(Action<T> onSome = null, Action onNone = null)
public Optional<T> DoAny(Action<T>? onSome = default, Action? onNone = default)
{
if (this is Some)
{
@@ -74,7 +74,7 @@ public abstract class Optional<T> : IEquatable<Optional<T>>
return this;
}
public Optional<V> Switch<V>(Func<T, V> onSome, Func<V> onNone)
public Optional<V> Switch<V>(Func<T, V>? onSome, Func<V>? onNone)
{
if (onSome is null)
{
@@ -95,7 +95,7 @@ public abstract class Optional<T> : IEquatable<Optional<T>>
return Optional.FromValue(onNone.Invoke());
}
}
public Optional<V> SwitchAny<V>(Func<T, V> onSome = null, Func<V> onNone = null)
public Optional<V> SwitchAny<V>(Func<T, V>? onSome = null, Func<V>? onNone = null)
{
if (this is Some)
{
@@ -107,7 +107,7 @@ public abstract class Optional<T> : IEquatable<Optional<T>>
}
}
public override bool Equals(object obj)
public override bool Equals(object? obj)
{
if (obj is Optional<T>)
{
@@ -117,17 +117,17 @@ public abstract class Optional<T> : IEquatable<Optional<T>>
return base.Equals(obj);
}
public bool Equals(Optional<T> other)
public bool Equals(Optional<T>? other)
{
if (this is Some && other is Some)
{
return this.As<Some>().Equals(other.As<Some>());
return this.As<Some>() is Some some ? some.Equals(other.As<Some>()) : false;
}
return false;
}
public static implicit operator Optional<T>(T value)
public static implicit operator Optional<T>(T? value)
{
return Optional.FromValue(value);
}
@@ -143,7 +143,7 @@ public abstract class Optional<T> : IEquatable<Optional<T>>
{
}
public override bool Equals(object obj)
public override bool Equals(object? obj)
{
if (obj is Some)
{
@@ -153,40 +153,40 @@ public abstract class Optional<T> : IEquatable<Optional<T>>
return base.Equals(obj);
}
public bool Equals(Some other)
public bool Equals(Some? other)
{
if (other is None)
{
return false;
}
if (other is Some)
if (other is not null)
{
return this.Value.Equals(other.Value);
return this.Value is not null && this.Value.Equals(other.Value);
}
return false;
}
public static bool operator ==(Some left, Some right)
public static bool operator ==(Some? left, Some right)
{
return left?.Equals(right) == true;
}
public static bool operator !=(Some left, Some right)
public static bool operator !=(Some? left, Some right)
{
return left?.Equals(right) != true;
}
public override int GetHashCode()
{
return this.Value is object ? this.Value.GetHashCode() : this.As<object>().GetHashCode();
return this.Value is object ? this.Value.GetHashCode() : this.As<object>() is object obj ? obj.GetHashCode() : 0;
}
}
internal class None : Optional<T>
{
public None() : base(default)
public None() : base(default!)
{
}
}