63ae5099b7
The `parse.pass.cpp` tests doen't need to call `test_format_context_create` to create a `basic_format_context`, so they shouldn't include `test_format_context.h`. The `to_address` mechanism works around the iterator debugging mechanisms of MSVC STL. Related to [LWG3989](https://cplusplus.github.io/LWG/issue3989). Discovered when implementing `formatter<tuple>` in MSVC STL. With the inclusion removed, `std/utilities/format/format.tuple/parse.pass.cpp` when using enhanced MSVC STL (and `/utf-8` option for MSVC).
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
//===----------------------------------------------------------------------===//
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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, c++20
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// UNSUPPORTED: no-threads
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// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
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// <thread>
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// template<class charT>
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// struct formatter<thread::id, charT>;
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// template<class ParseContext>
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// constexpr typename ParseContext::iterator
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// parse(ParseContext& ctx);
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// Note this tests the basics of this function. It's tested in more detail in
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// the format functions test.
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#include <cassert>
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#include <concepts>
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#include <memory>
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#include <thread>
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#include "test_macros.h"
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#include "make_string.h"
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#define SV(S) MAKE_STRING_VIEW(CharT, S)
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template <class StringViewT>
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constexpr void test_parse(StringViewT fmt, std::size_t offset) {
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using CharT = typename StringViewT::value_type;
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auto parse_ctx = std::basic_format_parse_context<CharT>(fmt);
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std::formatter<std::thread::id, CharT> formatter;
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static_assert(std::semiregular<decltype(formatter)>);
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std::same_as<typename StringViewT::iterator> auto it = formatter.parse(parse_ctx);
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// std::to_address works around LWG3989 and MSVC STL's iterator debugging mechanism.
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assert(std::to_address(it) == std::to_address(fmt.end()) - offset);
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}
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template <class CharT>
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constexpr void test_fmt() {
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test_parse(SV(""), 0);
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test_parse(SV("1"), 0);
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test_parse(SV("}"), 1);
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test_parse(SV("1}"), 1);
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}
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constexpr bool test() {
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test_fmt<char>();
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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test_fmt<wchar_t>();
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#endif
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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