25 lines
1.1 KiB
C#
25 lines
1.1 KiB
C#
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namespace Unity.VisualScripting
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{
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/* Implementation notes:
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*
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* IUnitConnection cannot implement IConnection<IUnitOutputPort, IUnitInputPort> because
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* the compiler will be overly strict and complain that types may unify.
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* https://stackoverflow.com/questions/7664790
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*
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* Additionally, using contravariance for the type parameters will compile but
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* fail at runtime, because Unity's Mono version does not properly support variance,
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* even though it's supposed to be a CLR feature since .NET 1.1.
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* https://forum.unity3d.com/threads/398665/
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* https://github.com/jacobdufault/fullinspector/issues/9
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*
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* Therefore, the only remaining solution is to re-implement source and destination
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* manually. This introduces ambiguity, as the compiler will warn, but it's fine
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* if the implementations point both members to the same actual object.
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*/
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public interface IUnitConnection : IConnection<IUnitOutputPort, IUnitInputPort>, IGraphElementWithDebugData
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{
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new FlowGraph graph { get; }
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}
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}
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