1 // Copyright (C) 2017 Andrzej Krzemienski. 2 // 3 // Use, modification, and distribution is subject to the Boost Software 4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at 5 // http://www.boost.org/LICENSE_1_0.txt) 6 // 7 // See http://www.boost.org/lib/optional for documentation. 8 // 9 // You are welcome to contact the author at: 10 // akrzemi1@gmail.com 11 12 #include "boost/optional/optional.hpp" 13 14 #ifdef __BORLANDC__ 15 #pragma hdrstop 16 #endif 17 18 boost::optional<int> getitem(); 19 main(int argc,const char * [])20int main(int argc, const char *[]) 21 { 22 boost::optional<int> a = getitem(); 23 boost::optional<int> b; 24 25 if (argc > 0) 26 b = argc; 27 28 if (a == b) 29 return 1; 30 31 return 0; 32 }