Re: [boost] Preprocessor: Nested loops

From: Paul Mensonides (pmenso57_at_[hidden])
Date: 2006-02-15 07:12:15

> -----Original Message-----
> From: boost-bounces_at_[hidden] 
> [mailto:boost-bounces_at_[hidden]] On Behalf Of Tobias Schwinger

> Oliver Kullmann wrote:
> > Given two sequences A and B (according to the Boost Preprocessor 
> > datastructure definition), I want to create a nested switch 
> statement, 
> > the outer switch running through the constants in A, the 
> inner loops 
> > running through B.
> 
> If you don't need to do it all within a macro, use file iteration:
> The generated code is much better to debug, human-readable 
> and it's generated faster.

More accurately....  It's consistently generated fast.  Using macro expansion
alone can be faster on some compilers and much slower on others.  Tobias is
correct, though, that the resulting code is much easier to debug without running
the result through a formatter.  The downside is that the scaffolding tends to
take over a file.

Regards,
Paul Mensonides