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// UNSUPPORTED: no-localization
11
12// TODO FMT This test should not require std::to_chars(floating-point)
13// XFAIL: availability-fp_to_chars-missing
14
15// Basic test to validate ill-formed code is properly detected.
16
17// <format>
18
19// template<class... Args>
20// size_t formatted_size(const locale& loc,
21// format-string<Args...> fmt, const Args&... args);
22// template<class... Args>
23// size_t formatted_size(const locale& loc,
24// wformat-string<Args...> fmt, const Args&... args);
25
26#include <format>
27#include <locale>
28
29#include "test_macros.h"
30
31// clang-format off
32
33void f() {
34 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), "{"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
35 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
36
37 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), "}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
38 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
39
40 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), "{}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
41 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
42
43 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), "{0}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
44 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
45
46 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), "{:-}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
47 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
48
49 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), "{:#}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
50 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
51
52 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), "{:L}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
53 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
54
55 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), "{0:{0}}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
56 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
57
58 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), "{:.42d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
59 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
60
61 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), "{:d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
62 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
63
64#ifndef TEST_HAS_NO_WIDE_CHARACTERS
65 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), L"{"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
66 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
67
68 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), L"}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
69 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
70
71 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), L"{}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
72 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
73
74 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), L"{0}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
75 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
76
77 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), L"{:-}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
78 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
79
80 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), L"{:#}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
81 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
82
83 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), L"{:L}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
84 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
85
86 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), L"{0:{0}}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
87 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
88
89 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), L"{:.42d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
90 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
91
92 TEST_IGNORE_NODISCARD std::formatted_size(std::locale(), L"{:d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
93 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
94#endif
95}
96

source code of libcxx/test/std/utilities/format/format.functions/formatted_size.locale.verify.cpp