Re: bug report on gcc port

[Danny Smith <danny_r_smith_2001 at yahoo dot co dot nz>]

--- Clark Sims <csims@templartrading.com> wrote: > The following code fragment
bombs the cygwin port of gcc:
> 
> #include <string>
> #include <ctype.h>
> 
> std::string foo( const std::string& rhs);
> 
> std::string foo( const std::string& rhs) {
>   std::string str = rhs;
>   for (size_t i=0; i<str.size(); i++) {
>     str[i] = ::tolower( str[i]);
>   }
>   return str;
> }
> 
> gcc -c foo.cpp :
> foo.cpp: In function `class string foo(const string &)':
> foo.cpp:9: parse error before `__extension__'
> foo.cpp:9: `__x' undeclared (first use this function)
> foo.cpp:9: (Each undeclared identifier is reported only once
> foo.cpp:9: for each function it appears in.)
> foo.cpp:9: parse error before `)'
> 
> The code fragments works well in other compilers and other ports of gcc.
> 
> 

Yes, the problem is in the is* and to*  macros in ctype.h.  Std C++ has
(overloaded) functions with same name and the macros cause havoc.  The macros
need to be guarded with #ifndef __cplusplus

In the meantime try enclosing (::tolower) in parenthesis to force use of
function rather than macro.

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