Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for an old version of Boost. Click here to view this page for the latest version.


// Copyright (C) 2009-2012 Lorenzo Caminiti
// Distributed under the Boost Software License, Version 1.0
// (see accompanying file LICENSE_1_0.txt or a copy at
// Home at

#include <map>

#define VAR(type, n) type var ## n

VAR(int, 1); // OK.

typedef std::map<int, char> map_type;
VAR(map_type, 3); // OK.

#include <boost/utility/identity_type.hpp>

VAR(BOOST_IDENTITY_TYPE((std::map<int, char>)), 4); // OK.

int main() { return 0; }