| //===----------------------------------------------------------------------===// |
| // 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, c++20 |
| // UNSUPPORTED: libcpp-has-no-incomplete-format |
| |
| // TODO FMT Fix this test using GCC, it currently times out. |
| // UNSUPPORTED: gcc-12 |
| |
| // [container.adaptors.format] |
| // For each of queue, priority_queue, and stack, the library provides the |
| // following formatter specialization where adaptor-type is the name of the |
| // template: |
| // |
| // template<class charT, class T, formattable<charT> Container, class... U> |
| // struct formatter<adaptor-type<T, Container, U...>, charT> |
| |
| // template<class FormatContext> |
| // typename FormatContext::iterator |
| // format(maybe-const-adaptor& r, FormatContext& ctx) const; |
| |
| // Note this tests the basics of this function. It's tested in more detail in |
| // the format functions test. |
| |
| #include <array> |
| #include <cassert> |
| #include <concepts> |
| #include <format> |
| #include <queue> |
| #include <stack> |
| |
| #include "test_format_context.h" |
| #include "test_macros.h" |
| #include "make_string.h" |
| |
| #define SV(S) MAKE_STRING_VIEW(CharT, S) |
| |
| template <class StringViewT, class Arg> |
| void test_format(StringViewT expected, Arg arg) { |
| using CharT = typename StringViewT::value_type; |
| using String = std::basic_string<CharT>; |
| using OutIt = std::back_insert_iterator<String>; |
| using FormatCtxT = std::basic_format_context<OutIt, CharT>; |
| |
| const std::formatter<Arg, CharT> formatter; |
| |
| String result; |
| OutIt out = std::back_inserter(result); |
| FormatCtxT format_ctx = test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg)); |
| formatter.format(arg, format_ctx); |
| assert(result == expected); |
| } |
| |
| template <class CharT> |
| void test_fmt() { |
| std::array input{1, 42, 99, 0}; |
| test_format(SV("[1, 42, 99, 0]"), std::queue<int>{input.begin(), input.end()}); |
| test_format(SV("[99, 42, 1, 0]"), std::priority_queue<int>{input.begin(), input.end()}); |
| test_format(SV("[1, 42, 99, 0]"), std::stack<int>{input.begin(), input.end()}); |
| } |
| |
| void test() { |
| test_fmt<char>(); |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| test_fmt<wchar_t>(); |
| #endif |
| } |
| |
| int main(int, char**) { |
| test(); |
| |
| return 0; |
| } |