// If the type is a delegate type, it returns it. If the type is an
// expression tree type associated with a delegate type, it returns
// the delegate type. Otherwise, null.
public static NamedTypeSymbol GetDelegateType(this TypeSymbol type)
{
if ((object)type == null)
{
return(null);
}
if (type.IsExpressionTree())
{
type = ((NamedTypeSymbol)type).TypeArguments[0]; //TypeArgumentsNoUseSiteDiagnostics[0];
}
return(type.IsDelegateType() ? (NamedTypeSymbol)type : null);
}
public static MethodSymbol DelegateInvokeMethod(this TypeSymbol type)
{
Debug.Assert((object)type != null);
Debug.Assert(type.IsDelegateType() || type.IsExpressionTree());
return((MethodSymbol)type.GetDelegateType().DelegateInvokeMethod);
}
