//===----------------------------------------------------------------------===// // // The LLVM Compiler Infrastructure // // This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // <string_view> // constexpr basic_string_view () noexcept; #include <experimental/string_view> #include <cassert> template<typename T> void test () { #if _LIBCPP_STD_VER > 11 { constexpr T sv1; static_assert ( sv1.size() == 0, "" ); static_assert ( sv1.empty(), ""); } #endif { T sv1; assert ( sv1.size() == 0 ); assert ( sv1.empty()); } } int main () { typedef std::experimental::string_view string_view; typedef std::experimental::u16string_view u16string_view; typedef std::experimental::u32string_view u32string_view; typedef std::experimental::wstring_view wstring_view; test<string_view> (); test<u16string_view> (); test<u32string_view> (); test<wstring_view> (); }