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Merge pull request #353 from LupusInferni315/master

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Castable Type Constraints
This commit is contained in:
Thor Brigsted 2022-09-15 14:18:48 +02:00 committed by GitHub
commit 1b64a96d40
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3 changed files with 26 additions and 1 deletions
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8
Scripts/Node.cs
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@ -52,7 +52,13 @@ namespace XNode {
/// <summary> Allow connections where output value type is assignable from input value type (eg. Object --> ScriptableObject)</summary>
InheritedInverse,
/// <summary> Allow connections where output value type is assignable from input value or input value type is assignable from output value type</summary>
InheritedAny
InheritedAny,
/// <summary> Allow connections where input value type is castable from output value type. </summary>
Castable,
/// <summary> Allow connections where output value type is castable from input value type. </summary>
CastableInverse,
/// <summary> Allow connections where input value type is castable from output value type or output value type is castable from input value type. </summary>
CastableAny
}
#region Obsolete

3
Scripts/NodePort.cs
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@ -279,6 +279,9 @@ namespace XNode {
if (output.typeConstraint == XNode.Node.TypeConstraint.Strict && input.ValueType != output.ValueType) return false;
if (output.typeConstraint == XNode.Node.TypeConstraint.InheritedInverse && !output.ValueType.IsAssignableFrom(input.ValueType)) return false;
if (output.typeConstraint == XNode.Node.TypeConstraint.InheritedAny && !input.ValueType.IsAssignableFrom(output.ValueType) && !output.ValueType.IsAssignableFrom(input.ValueType)) return false;
if (output.typeConstraint == XNode.Node.TypeConstraint.Castable && !input.ValueType.IsCastableFrom(output.ValueType)) return false;
if (output.typeConstraint == XNode.Node.TypeConstraint.CastableInverse && !output.ValueType.IsCastableFrom(input.ValueType)) return false;
if (output.typeConstraint == XNode.Node.TypeConstraint.CastableAny && !input.ValueType.IsCastableFrom(output.ValueType) && !output.ValueType.IsCastableFrom(input.ValueType)) return false;
// Success
return true;
}

16
Scripts/TypeExtensions.cs Normal file
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@ -0,0 +1,16 @@
using System.Linq;
using System.Reflection;
public static class TypeExtensions
{
/// <summary> Determines whether an instance of a specified type can be assigned to a variable of the current type. </summary>
public static bool IsCastableFrom(this Type to, Type from)
{
if ( to.IsAssignableFrom ( from ) )
return true;
return from.GetMethods ( BindingFlags.Public | BindingFlags.Static ).Any ( m =>
{
return m.ReturnType == to && ( m.Name == "op_Implicit" || m.Name == "op_Explicit" );
} );
}
}