Warnings with <iostream>

[Richard Atterer <atterer at informatik dot tu-muenchen dot de>]

Hello,

this is just to follow up to my own posting from last week, when I
reported crashes when outputting zero-length strings - this is indeed
fixed in the latest CVS sources!

However, not all the warnings when #include'ing <iostream> have been
eliminated. With the CVS sources from Oct 28 and these compiler flags:

  -Wall -W -Wpointer-arith -Wbad-function-cast -Wconversion
  -Wmissing-prototypes -Woverloaded-virtual -Winline -g -DVERSION_NR=""
  -DDEBUG

I get the following two warnings:

In file included from {libstdc++dir}/include/g++-v3/bits/std_string.h:46,
                 from {libstdc++dir}/include/g++-v3/bits/localefwd.h:39,
                 from {libstdc++dir}/include/g++-v3/bits/std_ios.h:49,
                 from {libstdc++dir}/include/g++-v3/bits/std_ostream.h:37,
                 from {libstdc++dir}/include/g++-v3/bits/std_iostream.h:38,
                 from {libstdc++dir}/include/g++-v3/iostream:2,
                 from myprog.cc:12:
{libstdc++dir}/include/g++-v3/bits/basic_string.h: In instantiation of
`basic_string<char,char_traits<char>,allocator<char> >':
{libstdc++dir}/include/g++-v3/bits/string.tcc:509:   instantiated from
here
{libstdc++dir}/include/g++-v3/bits/basic_string.h:116: warning:
negative integer implicitly converted to unsigned type

{libstdc++dir}/include/g++-v3/bits/basic_string.h: In instantiation of
`basic_string<__wchar_t,char_traits<__wchar_t>,allocator<__wchar_t> >':
{libstdc++dir}/include/g++-v3/bits/string.tcc:514:   instantiated from
here
{libstdc++dir}/include/g++-v3/bits/basic_string.h:116: warning:
negative integer implicitly converted to unsigned type

The corresponding part of basic_string.h looks like this:

      // NB: This is an unsigned type, and thus represents the maximum
      // size that the allocator can hold.
      static const size_type npos = -1;

Cheers,

  Richard

-- 
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