f712775daf
This paper was accepted during the last plenary and is intended to be backported to LLVM 15. When backporting the release notes in the branch should be updated too. Note the feature-test macro isn't updated since this will change; three papers have updated the same macro in the same plenary. Implements: - P2508R1 Exposing std::basic-format-string Reviewed By: ldionne, #libc Differential Revision: https://reviews.llvm.org/D130643
54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// UNSUPPORTED: libcpp-has-no-incomplete-format
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// libc++ supports basic_format_string in C++20 as an extension
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// UNSUPPORTED: !stdlib=libc++ && c++20
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// <format>
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// template<class charT, class... Args>
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// class basic_format_string<charT, type_identity_t<Args>...>
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//
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// constexpr basic_string_view<charT> get() const noexcept { return str; }
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#include <format>
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#include <cassert>
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#include <concepts>
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#include <string_view>
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#include "test_macros.h"
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#include "make_string.h"
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#define CSTR(S) MAKE_CSTRING(CharT, S)
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#define SV(S) MAKE_STRING_VIEW(CharT, S)
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template <class CharT>
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constexpr bool test() {
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assert((std::basic_format_string<CharT>{CSTR("foo")}.get() == SV("foo")));
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assert((std::basic_format_string<CharT, int>{CSTR("{}")}.get() == SV("{}")));
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assert((std::basic_format_string<CharT, int, float>{CSTR("{} {:01.23L}")}.get() == SV("{} {:01.23L}")));
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// Embedded NUL character
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assert((std::basic_format_string<CharT, void*, double>{SV("{}\0{}")}.get() == SV("{}\0{}")));
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return true;
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}
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int main(int, char**) {
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test<char>();
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static_assert(test<char>());
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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test<wchar_t>();
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static_assert(test<wchar_t>());
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#endif
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return 0;
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}
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