[cfe-dev] Enum parameters for a C++11 Attribute

[Aaron Ballman]

On Fri, Dec 19, 2014 at 11:14 AM, LUIS MIGUEL SANCHEZ GARCIA
<luismiguel.sanchez at uc3m.es> wrote:
> When I compile this sample:
>
> int main()
> {
>     int a = 5;
>     int b = 6;
>     [[own::myattr(RED)]]
>     auto j5 = 2*a ;
>     return 0;
> }
>
> I have the following message:
>
> $ clang++ test03.cpp  -std=c++11 -Xclang -ast-dump -fsyntax-only
> test03.cpp:7:19: error: use of undeclared identifier 'RED'
>     [[own::myattr(RED)]]
>                   ^
> Using:
> def OWNMyattr : Attr {
>   let Spellings = [CXX11<"own", "myattr">];
>   let Args = [VariadicEnumArgument<"Color", "ColorType",
>                            ["RED", "BLUE","GREEN"],
>                            ["RED", "BLUE","GREEN"]>];
>   let Documentation = [Undocumented];
> }
>
> However if I use "RED" instead RED, It compiles.

Hmmm, it seems that variadic enum arguments are strings only, which is
inconsistent with enum arguments which can be strings or identifiers.
I believe that's an an oversight, and have fixed it in r224582.

~Aaron