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
10
11// <format>
12
13// constexpr void advance_to(const_iterator it);
14
15#include <format>
16
17#include <cassert>
18#include <string_view>
19
20#include "test_macros.h"
21
22template <class CharT>
23constexpr void test(const CharT* fmt) {
24 {
25 std::basic_format_parse_context<CharT> context(fmt);
26
27 context.advance_to(context.begin() + 1);
28 assert(std::to_address(context.begin()) == fmt + 1);
29
30 context.advance_to(context.begin() + 1);
31 assert(std::to_address(context.begin()) == fmt + 2);
32
33 context.advance_to(context.begin() + 1);
34 assert(context.begin() == context.end());
35 }
36 {
37 std::basic_string_view view{fmt};
38 std::basic_format_parse_context context(view);
39
40 context.advance_to(context.begin() + 1);
41 assert(std::to_address(context.begin()) == fmt + 1);
42
43 context.advance_to(context.begin() + 1);
44 assert(std::to_address(context.begin()) == fmt + 2);
45
46 context.advance_to(context.begin() + 1);
47 assert(context.begin() == context.end());
48 }
49}
50
51constexpr bool test() {
52 test(fmt: "abc");
53#ifndef TEST_HAS_NO_WIDE_CHARACTERS
54 test(fmt: L"abc");
55#endif
56#ifndef TEST_HAS_NO_CHAR8_T
57 test(fmt: u8"abc");
58#endif
59 test(fmt: u"abc");
60 test(fmt: U"abc");
61
62 return true;
63}
64
65int main(int, char**) {
66 test();
67 static_assert(test());
68
69 return 0;
70}
71

source code of libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/advance_to.pass.cpp