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From: Alex Vinokur <alexvn AT bigfoot DOT com>
Newsgroups: comp.os.msdos.djgpp,comp.lang.c++
Subject: Passing 'const' as 'this' discards qualifiers
Date: Tue, 04 Dec 2001 15:25:56 +0200
Organization: Scopus Network Technologies
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===============================================================
Windows98
gpp : GNU C++ version 2.95.3 20010315/djgpp (release) (djgpp)
      compiled by GNU C version 2.95.3 20010315/djgpp (release).
===============================================================

Hi,

A compiler detects error in program below.
What is wrong in the program?

//------------- C++ Code : BEGIN -------------
#include <set>

class AAA;

class less_AAA
{
  public:
    bool operator() (AAA& ins1, AAA& ins2) {return false;}
};

class AAA
{
  public:
    void foo1 () {};
};

int main ()
{
set<AAA, less_AAA>::iterator iter;
  iter->foo1();   // Line#20

  return 0;
}

//-------------- C++ Code : END --------------


//------------- Compiling : BEGIN ------------

gpp ttt.c

ttt.c: In function `int main()':
ttt.c:20: passing `const AAA' as `this' argument of `void AAA::foo1()'
discards qualifiers

//-------------- Compiling : END -------------


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