[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Trouble debugging some STL code
From: |
address@hidden |
Subject: |
Trouble debugging some STL code |
Date: |
Wed, 24 Jan 2018 21:47:20 -0800 (PST) |
User-agent: |
G2/1.0 |
#include <iostream>
#include <map>
#include <set>
#include <iterator>
#include <algorithm>
#include <string>
std::ostream& operator << (std::ostream& o, const std::pair<std::string, int> p)
{
o << p.first << " " << p.second << std::endl;
return o;
}
std::ostream& operator << (std::ostream& o, const std::map<std::string,int>&
map)
{
typename std::map<std::string,int>::iterator it = map.begin();
o << "(";
while (it != map.end())
{
o << *it << ' ';
++it;
}
o << ")";
return o;
}
int main()
{
std::map<std::string,int> map;
std::cout << "map=" << map << std::endl;
}
-----------------------------------------------------------------------------
Here is the compiler output:
-*- mode: compilation; default-directory: "~/lisp++-projects/" -*-
Compilation started at Thu Jan 25 18:45:22
cd ~/lisp++-projects && make 2018/map/map5.run
make: Warning: File '2006/libd/libd.o' has modification time 26862 s in the
future
* Compiling 2018/map/map5.cc DEBUG
g++ -g -O0 -std=c++11 -W -Wall -Wpointer-arith -Wformat -ffast-math
-fno-permissive -Wno-format-contains-nul -c 2018/map/map5.cc -o 2018/map/map5.o
2018/map/map5.cc: In function ‘std::ostream& operator<<(std::ostream&, const
std::map<std::__cxx11::basic_string<char>, int>&)’:
2018/map/map5.cc:16:63: error: conversion from
‘std::map<std::__cxx11::basic_string<char>, int>::const_iterator {aka
std::_Rb_tree_const_iterator<std::pair<const std::__cxx11::basic_string<char>,
int> >}’ to non-scalar type ‘std::map<std::__cxx11::basic_string<char>,
int>::iterator {aka std::_Rb_tree_iterator<std::pair<const
std::__cxx11::basic_string<char>, int> >}’ requested
typename std::map<std::string,int>::iterator it = map.begin();
^
Makefile.mk:66: recipe for target '2018/map/map5.o' failed
make: *** [2018/map/map5.o] Error 1
Compilation exited abnormally with code 2 at Thu Jan 25 18:45:24
Compilation started at: 20180125-184522
compilation-start-time=(23145 28402 353882 710000)
compilation-stop-time=(23145 28404 423781 491000)
Compilation took 2 seconds
What gives with the error message? What mm I doing wrong?
- Trouble debugging some STL code,
address@hidden <=