[CMake] 1 tricky question, 1 bug report

[Maik Beckmann]

Brad King schrieb am Montag 16 März 2009 um 15:06:
>
> CALL FOO() ; MODULE mymod ! crazy, but possible

Damn, you are right.

> Perhaps it is simplest to use the file extension as a heuristic for now.
> At least some compilers require special flags to build ".f" as free format.
> If this becomes a real problem we can do something better later.

agreed

> The question remains how to handle both formats in the lexer.  The original
> makedepf90 code on which it is based handles things with the fixed_fmt
> state plus support for strings of either format in the common quote states.
>  It might just work if we invoke BEGIN(fixed_fmt) before parsing.

This is option number one.   
{{{
..
%%
// will be processed before yylex
%{
 // manage states before yylex is called
if(...)
  BEGIN(fixed_fmt)
else:
  BEGIN(free_fmt)
%}
...
%%
..
}}}


Since you showed me an example where my lazy approach doesn't work, this is my 
new favorite.  All we got to make sure is that the str_* start states don't 
mess with the *_fmt ones.  

I still didn't test whether  fixed format file can include a free format file, 
or vise versa.  In this case having distinct lexers(and parsers?) is the only 
reliable approach.
 
-- Maik