Re: [Swig-devel] Why does SWIG have two C lexers?

[William S F. <ws...@fu...>]

Olly Betts wrote:
> I've just noticed that SWIG has Source/CParse/cscanner.c and
> Source/Swig/scanner.c, which both produce tokens from C/C++ source code.
> It appears that both are in use too - cscanner.c is used to feed the
> Bison parser, while scanner.c seems to be used to do some nefarious
> parsing of #define constants.
> 
> What exactly is the difference, and why are there two different bits of
> code doing apparently the same job?
> 
> The danger of course is that they get out of step (e.g. scanner.c knows
> about relational operators like !=, <=, etc which cscanner.c didn't
> until I patched it to a few days ago so that we can handle them in
> template parameters and other constant expressions).
> 
No idea, Dave Beazley is probably the man who knows the history of this.
If you can see some obvious ways to remove duplicate code go for it.

William