test/containers/associative/map/map.access/index_key.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <map>

// class map

// mapped_type& operator[](const key_type& k);

#include <map>
#include <cassert>

int main()
{
    typedef std::pair<const int, double> V;
    V ar[] =
    {
        V(1, 1.5),
        V(2, 2.5),
        V(3, 3.5),
        V(4, 4.5),
        V(5, 5.5),
        V(7, 7.5),
        V(8, 8.5),
    };
    std::map<int, double> m(ar, ar+sizeof(ar)/sizeof(ar[0]));
    assert(m.size() == 7);
    assert(m[1] == 1.5);
    assert(m.size() == 7);
    m[1] = -1.5;
    assert(m[1] == -1.5);
    assert(m.size() == 7);
    assert(m[6] == 0);
    assert(m.size() == 8);
    m[6] = 6.5;
    assert(m[6] == 6.5);
    assert(m.size() == 8);
}