1 //===----------------------------------------------------------------------===//
2 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
3 // See https://llvm.org/LICENSE.txt for license information.
4 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
5 //
6 //===----------------------------------------------------------------------===//
7
8 // UNSUPPORTED: c++03, c++11, c++14, c++17
9 // UNSUPPORTED: no-localization
10 // UNSUPPORTED: libcpp-has-no-incomplete-format
11 // TODO FMT Evaluate gcc-12 status
12 // UNSUPPORTED:gcc-12
13 // TODO FMT Investigate AppleClang ICE
14 // UNSUPPORTED: apple-clang-13
15
16 // <format>
17
18 // template<class... Args>
19 // string format(const locale& loc, format-string<Args...> fmt, const Args&... args);
20 // template<class... Args>
21 // wstring format(const locale& loc, wformat-string<Args...> fmt, const Args&... args);
22
23 #include <format>
24 #include <cassert>
25 #include <iostream>
26 #include <vector>
27
28 #include "test_macros.h"
29 #include "format_tests.h"
30 #include "string_literal.h"
31
32 auto test = []<string_literal fmt, class CharT, class... Args>(std::basic_string_view<CharT> expected,
33 const Args&... args) constexpr {
34 std::basic_string<CharT> out = std::format(std::locale(), fmt.template sv<CharT>(), args...);
35 if constexpr (std::same_as<CharT, char>)
36 if (out != expected)
37 std::cerr << "\nFormat string " << fmt.template sv<char>() << "\nExpected output " << expected
38 << "\nActual output " << out << '\n';
39 assert(out == expected);
40 };
41
42 auto test_exception = []<class CharT, class... Args>(std::string_view, std::basic_string_view<CharT>, const Args&...) {
43 // After P2216 most exceptions thrown by std::format become ill-formed.
44 // Therefore this tests does nothing.
45 // A basic ill-formed test is done in format.locale.verify.cpp
46 // The exceptions are tested by other functions that don't use the basic-format-string as fmt argument.
47 };
48
main(int,char **)49 int main(int, char**) {
50 format_tests<char>(test, test_exception);
51
52 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
53 format_tests_char_to_wchar_t(test);
54 format_tests<wchar_t>(test, test_exception);
55 #endif
56
57 return 0;
58 }
59