1 // Copyright Louis Dionne 2013-2017 2 // Distributed under the Boost Software License, Version 1.0. 3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) 4 5 #include <boost/hana/assert.hpp> 6 #include <boost/hana/drop_front_exactly.hpp> 7 #include <boost/hana/equal.hpp> 8 #include <boost/hana/integral_constant.hpp> 9 #include <boost/hana/string.hpp> 10 namespace hana = boost::hana; 11 12 main()13int main() { 14 BOOST_HANA_CONSTANT_CHECK(hana::equal( 15 hana::drop_front_exactly(BOOST_HANA_STRING("a")), 16 BOOST_HANA_STRING("") 17 )); 18 19 BOOST_HANA_CONSTANT_CHECK(hana::equal( 20 hana::drop_front_exactly(BOOST_HANA_STRING("ab")), 21 BOOST_HANA_STRING("b") 22 )); 23 24 BOOST_HANA_CONSTANT_CHECK(hana::equal( 25 hana::drop_front_exactly(BOOST_HANA_STRING("abc")), 26 BOOST_HANA_STRING("bc") 27 )); 28 29 BOOST_HANA_CONSTANT_CHECK(hana::equal( 30 hana::drop_front_exactly(BOOST_HANA_STRING("abcdefghijk")), 31 BOOST_HANA_STRING("bcdefghijk") 32 )); 33 34 35 BOOST_HANA_CONSTANT_CHECK(hana::equal( 36 hana::drop_front_exactly(BOOST_HANA_STRING("abc"), hana::size_c<2>), 37 BOOST_HANA_STRING("c") 38 )); 39 40 BOOST_HANA_CONSTANT_CHECK(hana::equal( 41 hana::drop_front_exactly(BOOST_HANA_STRING("abcdefghijk"), hana::size_c<3>), 42 BOOST_HANA_STRING("defghijk") 43 )); 44 } 45