Token strings as "cheap" macros.

[Reiner Pope]

Daniel Keep wrote:
> 
> Reiner Pope wrote:
>> [snip]
>>
>> I made my own compile-time formatter. I made one based on Phobos
>> formatting, and then I decided I preferred indexable style (like Tango),
>> so I've got one of each: formatStringTango and formatStringPhobos. Just
>> now, I added a wrapper function for formatStringTango which allows
>> expressions instead of indexes. Here's the unittest:
>>
>> unittest
>> {
>>     const x = 5;
>>     const y = 7;
>>     static assert(mixin(format("{x} = 5, {y} = 7")) == "5 = 5, 7 = 7");
>> }
>>
>> I've attached the source code.  It's full of other templates I made to
>> help work around problems with metaprogramming (__traits in particular),
>> but it at least shows that it's pretty much achievable within the
>> language. Of course, macros would be nice, to remove the mixin().
>>
>>   -- Reiner
>>
> 
> I've made one too :)
> 
> http://while-nan.blogspot.com/2007/06/mixins-ctfe-and-shell-style-variable.html
> 
> 	-- Daniel

What, the formatting can be evaluated at compile-time?

   -- Reiner