how can I get the UDA's of a type that I only know by name and only in a CTFE.

I would like to loop over an array of names passed to a me(I don't know their contents beforehand) and get the attributes.

I've tried to use a mixin but I can't get the mixin to work on the string name...

e.g., mixin("alias a = __traits(getAttributes, "~type~");");

On 2013-08-02 03:02, JS wrote:
> how can I get the UDA's of a type that I only know by name and only in a
> CTFE.
>
> I would like to loop over an array of names passed to a me(I don't know
> their contents beforehand) and get the attributes.
>
> I've tried to use a mixin but I can't get the mixin to work on the
> string name...
>
> e.g., mixin("alias a = __traits(getAttributes, "~type~");");

You need to use a typetuple as well:

import std.typetuple;
enum attribute;

@attribute struct Foo {}

void main ()
{
    alias a = TypeTuple!(__traits(getAttributes, mixin("Foo")));
    pragma(msg, a);
}

-- 
/Jacob Carlborg