private static ConversionClass ClassifyCLRConversionForArrayElementTypes(Type TargetElementType, Type SourceElementType)
{
if (Symbols.IsReferenceType(SourceElementType) && Symbols.IsReferenceType(TargetElementType))
{
return(ClassifyPredefinedCLRConversion(TargetElementType, SourceElementType));
}
if (Symbols.IsValueType(SourceElementType) && Symbols.IsValueType(TargetElementType))
{
return(ClassifyPredefinedCLRConversion(TargetElementType, SourceElementType));
}
if (Symbols.IsGenericParameter(SourceElementType) && Symbols.IsGenericParameter(TargetElementType))
{
if (SourceElementType == TargetElementType)
{
return(ConversionClass.Identity);
}
if (Symbols.IsReferenceType(SourceElementType) && Symbols.IsOrInheritsFrom(SourceElementType, TargetElementType))
{
return(ConversionClass.Widening);
}
if (Symbols.IsReferenceType(TargetElementType) && Symbols.IsOrInheritsFrom(TargetElementType, SourceElementType))
{
return(ConversionClass.Narrowing);
}
}
return(ConversionClass.None);
}