Compile time data structure

[Ali Çehreli]

On 09/16/2013 01:24 PM, Marek Janukowicz wrote:

 >    static string[string] columns () {
// ...
 >    }

Although the function itself is static, it returns a dynamic value.

 >      foreach( attr, col; columns() ) {
 >        __traits(getMember, me, attr) = typeof(__traits(getMember, me,
 > attr)).init;
 >      }

That foreach is a run-time foreach because columns()'s return value is a 
run-time value.

As far as I know, static foreach is only for tuples (or TypeTuples). If 
you can generate the AA as a tuple, then the foreach will be evaluated 
at compile time.

Ali