//===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // UNSUPPORTED: c++03, c++11, c++14, c++17 // // template , class Allocator = allocator > // class basic_ostringstream // basic_string_view view() const noexcept; #include #include #include #include "make_string.h" #include "test_macros.h" #define STR(S) MAKE_STRING(CharT, S) #define SV(S) MAKE_STRING_VIEW(CharT, S) template struct my_char_traits : public std::char_traits {}; template static void test() { std::basic_ostringstream ss(STR(" 123 456")); static_assert(noexcept(ss.view())); assert(ss.view() == SV(" 123 456")); int i = 0; ss << i; assert(ss.view() == SV("0123 456")); ss << 456; assert(ss.view() == SV("0456 456")); ss.str(STR(" 789")); assert(ss.view() == SV(" 789")); ss << SV("abc"); assert(ss.view() == SV("abc9")); const std::basic_ostringstream css(STR("abc")); static_assert(noexcept(css.view())); assert(css.view() == SV("abc")); std::basic_ostringstream> tss; static_assert(std::is_same_v>>); } int main(int, char**) { test(); #ifndef TEST_HAS_NO_WIDE_CHARACTERS test(); #endif return 0; }