void const_test( json::value const & value )
{
BOOST_TEST( value.has_key("cafe") );
try
{
value["sam"];
int should_have_thrown = 1;
BOOST_TEST( should_have_thrown == 0 );
}
catch( std::out_of_range & e )
{}
BOOST_TEST( value["cafe"] == "open" );
BOOST_TEST( value["bar"][2] == 1234.5 );
}