foreach/test/user_defined.cpp
2010-04-14 01:26:51 +00:00

55 lines
1.3 KiB
C++

// (C) Copyright Eric Niebler 2005.
// Use, modification and distribution are subject to the
// Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
/*
Revision history:
25 August 2005 : Initial version.
*/
#include <boost/test/minimal.hpp>
///////////////////////////////////////////////////////////////////////////////
// define a user-defined collection type and teach BOOST_FOREACH how to enumerate it
//
namespace mine
{
struct dummy {};
char * range_begin(mine::dummy&) {return 0;}
char const * range_begin(mine::dummy const&) {return 0;}
char * range_end(mine::dummy&) {return 0;}
char const * range_end(mine::dummy const&) {return 0;}
}
#include <boost/foreach.hpp>
namespace boost
{
template<>
struct range_mutable_iterator<mine::dummy>
{
typedef char * type;
};
template<>
struct range_const_iterator<mine::dummy>
{
typedef char const * type;
};
}
///////////////////////////////////////////////////////////////////////////////
// test_main
//
int test_main( int, char*[] )
{
// loop over a user-defined type (just make sure this compiles)
mine::dummy d;
BOOST_FOREACH( char c, d )
{
((void)c); // no-op
}
return 0;
}