[cvs-nhc98] cvs commit: cpphs CppIfdef.hs

[Malcolm Wallace]

>   Modified files:
>     .                    CppIfdef.hs 
>   Log:
>   Inline "trace" to make it abundantly clear where CppIfdef.cpp is cheating
>   (i.e. uses unsafePerformIO). This function should really be in the IO
>   monad, but to avoid space leaks, quite some restructuring would be
>   necessary. Using lazy I/O via readFile should probably be avoided, too.

Hmm.  Using lazy readFile is the easiest route to avoiding space
leaks here.  At the moment, cpphs runs in a constant 10kb of heap space
(compiled with nhc98), no matter the size of the input file.

Regards,
    Malcolm