ext/stl_hashtable.h:313 - computed value not used + question regarding __gnu_cxx

[Paolo Carlini]

Hi,

> I get warnings from including ext/hash_map extended stl libraries.. the
> warning occurs in ext/stl_hashtable.h:313

Can you please be more specific (i.e., code snippet triggering the warning, 3.1
snapshot you are testing, etc.) ??

With 3.1 20020317 I can compile -Wall -Werror the example below with no warnings
at all.

Thanks,
Paolo.

///////////////

#include <ext/hash_map>
#include <iostream>

using namespace __gnu_cxx;
using namespace std;

struct eqstr
{
  bool operator()(const char* s1, const char* s2) const
  {
    return strcmp(s1, s2) == 0;
  }
};

int main()
{
  hash_map<const char*, int, hash<const char*>, eqstr> months;

  months["january"] = 31;
  months["february"] = 28;
  months["march"] = 31;
  months["april"] = 30;
  months["may"] = 31;
  months["june"] = 30;
  months["july"] = 31;
  months["august"] = 31;
  months["september"] = 30;
  months["october"] = 31;
  months["november"] = 30;
  months["december"] = 31;

  cout << "september -> " << months["september"] << endl;
  cout << "april     -> " << months["april"] << endl;
  cout << "june      -> " << months["june"] << endl;
  cout << "november  -> " << months["november"] << endl;
}