libstdc++/78: compiler error on basic_string template

[samuel dot fryer at kodak dot com]

>Number:         78
>Category:       libstdc++
>Synopsis:       compiler error on basic_string template
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jul 28 07:57:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Sam Fryer
>Release:        2.95.2 (19991024) AND 2.96 (20000722)
>Organization:
>Environment:
RedHat 6.2 on a dual P3
>Description:
A transcript of my session explains it best:

$ more x.cpp
#include <std/bastring.h>
template class basic_string<wchar_t>;

$ g++ -c x.cpp
.../include/g++-3/std/bastring.h: In method `const charT *basic_string<charT, traits, 
Allocator>::c_str () const [with charT = __wchar_t, traits = string_char_traits<__wchar_t>, Allocator = 
__default_alloc_template<true, 0>]':
wstring.cpp:2:   instantiated from here
.../include/g++-3/std/bastring.h:343: cannot convert `const char *' to `const 
__wchar_t *' in return

>How-To-Repeat:
Create the x.cpp as shown in the description and
run "g++ -c x.cpp"
>Fix:
My solution (which probably isn't the optimal solution) 
is shown in this diff:

*** bastring.h.orig     Thu Jul 27 11:01:23 2000
--- bastring.h.new      Thu Jul 27 14:26:41 2000
*************** private:
*** 340,346 ****
  
  public:
    const charT* c_str () const
!     { if (length () == 0) return ""; terminate (); return data (); }
    void resize (size_type n, charT c);
    void resize (size_type n)
      { resize (n, eos ()); }
--- 340,346 ----
  
  public:
    const charT* c_str () const
!     { if (length () == 0) return (const charT*)""; terminate (); return data (); }
    void resize (size_type n, charT c);
    void resize (size_type n)
      { resize (n, eos ()); }
>Release-Note:
>Audit-Trail:
>Unformatted: