Finding UDAs with Templates

[Artur Skawina]

On 07/23/13 08:38, Jacob Carlborg wrote:
> static bool doesFieldSync (string field) ()
> {
>     alias attrs = TypeTuple!(__traits(getAttributes, mixin("FileData." ~ field)));
>     return staticIndexOf!(Sync, attrs) != -1;
> }
> 
> The important things here are that __traits(getAttributes) returns a tuple. You cannot assign a tuple to a variable. 

We can. :) 

   enum attrs = __traits... // `auto` would work too.

Just be careful and remember the `typeof(attrs)` part if/when
using staticIndexOf with types - it might otherwise return bogus
results (instead of failing).

   staticIndexOf!(Sync, typeof(attrs))

artur