Improving std.regex(p)

[BCS]

Hello bearophile,

> Ben Hanson:
> 
>> Can you output source code at compilation time and have D compile it,
>> or do you use a load of recursion like C++ TMP?
>> 
> This can be done with string mixin. You can use compile-time
> evaluation to build a string of code, and the mix it in somewhere, the
> compiler will compile it. It's a dirty thing, but unless D3 gets
> macros, it's the thing to be used. You can use it to build a string of
> asm code too, because it's part of D syntax.

OTOH, and IHMO it should be avoided where you can, kinda like goto. (For 
one things, forget having usable line numbers in your error messages.) You 
can often get a lot done with static if, tuple foreach, const values feed 
to boilerplate code and the like with just a scattering of one or two line 
mixins stuffed in the middle.

> 
> Bye,
> bearophile
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