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: libcpp-no-concepts
10 // UNSUPPORTED: libcpp-has-no-localization
11 // UNSUPPORTED: libcpp-has-no-incomplete-format
12 // TODO FMT Evaluate gcc-11 status
13 // UNSUPPORTED: gcc-11
14 
15 // <format>
16 
17 // string vformat(const locale& loc, string_view fmt, format_args args);
18 // wstring vformat(const locale& loc, wstring_view fmt, wformat_args args);
19 
20 #include <format>
21 #include <cassert>
22 #include <vector>
23 
24 #include "test_macros.h"
25 #include "format_tests.h"
26 
27 auto test = []<class CharT, class... Args>(std::basic_string<CharT> expected,
28                                            std::basic_string<CharT> fmt,
29                                            const Args&... args) {
30   std::basic_string<CharT> out = std::vformat(
31       std::locale(), fmt,
32       std::make_format_args<std::basic_format_context<
33           std::back_insert_iterator<std::basic_string<CharT>>, CharT>>(
34           args...));
35   assert(out == expected);
36 };
37 
38 auto test_exception = []<class CharT, class... Args>(
39     std::string_view what, std::basic_string<CharT> fmt, const Args&... args) {
40 #ifndef TEST_HAS_NO_EXCEPTIONS
41   try {
42     std::vformat(
43         std::locale(), fmt,
44         std::make_format_args<std::basic_format_context<
45             std::back_insert_iterator<std::basic_string<CharT>>, CharT>>(
46             args...));
47     assert(false);
48   } catch (std::format_error& e) {
49     LIBCPP_ASSERT(e.what() == what);
50     return;
51   }
52   assert(false);
53 #else
54   (void)what;
55   (void)fmt;
56   (void)sizeof...(args);
57 #endif
58 };
59 
60 int main(int, char**) {
61   format_tests<char>(test, test_exception);
62 
63 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
64   format_tests_char_to_wchar_t(test);
65   format_tests<wchar_t>(test, test_exception);
66 #endif
67 
68   return 0;
69 }
70