| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 10 | |
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| 11 | // libc++ supports basic_format_string in C++20 as an extension |
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| 12 | // UNSUPPORTED: !stdlib=libc++ && c++20 |
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| 13 | |
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| 14 | // <format> |
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| 15 | |
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| 16 | // template<class charT, class... Args> |
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| 17 | // class basic_format_string<charT, type_identity_t<Args>...> |
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| 18 | // |
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| 19 | // template<class T> consteval basic_format_string(const T& s); |
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| 20 | // |
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| 21 | // This constructor does the compile-time format string validation for the |
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| 22 | // std::format* functions. |
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| 23 | |
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| 24 | #include <format> |
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| 25 | |
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| 26 | #include <string_view> |
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| 27 | |
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| 28 | #include "test_macros.h" |
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| 29 | |
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| 30 | void run() { |
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| 31 | (void)std::basic_format_string<char>{"foo" }; |
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| 32 | (void)std::basic_format_string<char>{"{}" }; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}} |
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| 33 | (void)std::basic_format_string<char, int>{"{0:{0}P}" }; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}} |
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| 34 | (void)std::basic_format_string<char, int>{"{0:{0}}" }; |
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| 35 | (void)std::basic_format_string<char, bool>{"{0:{0}}" }; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}} |
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| 36 | (void)std::basic_format_string<char, int>{"{.3}" }; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}} |
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| 37 | #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
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| 38 | (void)std::basic_format_string<wchar_t>{L"foo" }; |
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| 39 | (void)std::basic_format_string<wchar_t>{L"{}" }; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}} |
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| 40 | (void)std::basic_format_string<wchar_t, int>{L"{0:{0}P}" }; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}} |
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| 41 | (void)std::basic_format_string<wchar_t, int>{L"{0:{0}}" }; |
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| 42 | (void)std::basic_format_string<wchar_t, bool>{L"{0:{0}}" }; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}} |
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| 43 | (void)std::basic_format_string<wchar_t, int>{L"{.3}" }; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}} |
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| 44 | #endif |
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| 45 | } |
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| 46 | |
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