1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
10
11// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
12
13// <format>
14
15// template<ranges::input_range R, class charT>
16// struct range-default-formatter<range_format::sequence, R, charT>
17
18// template<class FormatContext>
19// typename FormatContext::iterator
20// format(maybe-const-r& elems, FormatContext& ctx) const;
21
22#include <array>
23#include <cassert>
24#include <concepts>
25#include <format>
26#include <iterator>
27
28#include "assert_macros.h"
29#include "format.functions.common.h"
30#include "test_format_context.h"
31#include "test_macros.h"
32#include "make_string.h"
33
34#define SV(S) MAKE_STRING_VIEW(CharT, S)
35
36template <class StringViewT>
37void test_format(StringViewT expected, std::array<int, 2> arg) {
38 using CharT = typename StringViewT::value_type;
39 using String = std::basic_string<CharT>;
40 using OutIt = std::back_insert_iterator<String>;
41 using FormatCtxT = std::basic_format_context<OutIt, CharT>;
42
43 std::formatter<std::array<int, 2>, CharT> formatter;
44
45 String result;
46 OutIt out = std::back_inserter(result);
47 FormatCtxT format_ctx = test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg));
48 formatter.format(arg, format_ctx);
49 assert(result == expected);
50}
51
52template <class CharT>
53void test_assure_parse_is_called(std::basic_string_view<CharT> fmt) {
54 using String = std::basic_string<CharT>;
55 using OutIt = std::back_insert_iterator<String>;
56 using FormatCtxT = std::basic_format_context<OutIt, CharT>;
57 std::array<parse_call_validator, 2> arg;
58
59 String result;
60 OutIt out = std::back_inserter(result);
61 FormatCtxT format_ctx = test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg));
62
63 std::formatter<decltype(arg), CharT> formatter;
64 std::basic_format_parse_context<CharT> ctx{fmt};
65
66 formatter.parse(ctx);
67 formatter.format(arg, format_ctx);
68}
69
70template <class CharT>
71void test_assure_parse_is_called() {
72 using String = std::basic_string<CharT>;
73 using OutIt = std::back_insert_iterator<String>;
74 using FormatCtxT = std::basic_format_context<OutIt, CharT>;
75 std::array<parse_call_validator, 2> arg;
76
77 String result;
78 OutIt out = std::back_inserter(result);
79 [[maybe_unused]] FormatCtxT format_ctx =
80 test_format_context_create<OutIt, CharT>(out, std::make_format_args<FormatCtxT>(arg));
81
82 { // parse not called
83 [[maybe_unused]] const std::formatter<decltype(arg), CharT> formatter;
84 TEST_THROWS_TYPE(parse_call_validator::parse_function_not_called, formatter.format(arg, format_ctx));
85 }
86
87 test_assure_parse_is_called(SV("5"));
88 test_assure_parse_is_called(SV("n"));
89 test_assure_parse_is_called(SV("5n"));
90}
91
92template <class CharT>
93void test_fmt() {
94 test_format(SV("[1, 42]"), std::array<int, 2>{{1, 42}});
95 test_format(SV("[0, 99]"), std::array<int, 2>{{0, 99}});
96
97 test_assure_parse_is_called<CharT>();
98}
99
100void test() {
101 test_fmt<char>();
102#ifndef TEST_HAS_NO_WIDE_CHARACTERS
103 test_fmt<wchar_t>();
104#endif
105}
106
107int main(int, char**) {
108 test();
109
110 return 0;
111}
112

source code of libcxx/test/std/utilities/format/format.range/format.range.fmtdef/format.pass.cpp