Generic extension exception and multiple extension methos for single userdata: fixes #130
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added 2 commits
March 8, 2016 11:40
…called extension method in each userdata instance example : userdata.ExtMethod1() --called fine userdata.ExtMethod2() --null indexer!
… case when multiple extension methods with similar signature were available in different extension classes, and one of the extension methods has generic argument as extendable type: TweenSettingsExtensions.SetEase<T>(this T t, Ease ease) where T : Tween; //this one cause exception shot upon calling SetEase SpecialTweenExtensions.SetEase(this Tweener @this, Ease ease)
havietisov
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This was referenced Jun 30, 2025
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In case we called some extension method in context of some userdata, we are not allowed to call any other because they will not be indexed (always nil)
example :
userdata.ExtMethod1() --called fine
userdata.ExtMethod2() --null indexer!
and, if we call ExtMethod2 first, ExtMethod1 will be nil
ExtensionMethodsRegistry.GetGenericMatch trying to create GetGenericTypeDefinition of type parameter.
Example:
TweenSettingsExtensions.SetEase(this T t, Ease ease) //causes exception being thrown, because we are not allowed to create T<>