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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: libcpp-has-no-incomplete-format
// libc++ supports basic_format_string in C++20 as an extension
// UNSUPPORTED: !stdlib=libc++ && c++20
// <format>
// template<class charT, class... Args>
// class basic_format_string<charT, type_identity_t<Args>...>
//
// template<class T> consteval basic_format_string(const T& s);
//
// This constructor does the compile-time format string validation for the
// std::format* functions.
#include <format>
#include <string_view>
#include "test_macros.h"
void run() {
(void)std::basic_format_string<char>{"foo"};
(void)std::basic_format_string<char>{"{}"}; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}}
(void)std::basic_format_string<char, int>{"{0:{0}P}"}; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}}
(void)std::basic_format_string<char, int>{"{0:{0}}"};
(void)std::basic_format_string<char, float>{"{0:{0}}"}; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}}
(void)std::basic_format_string<char, int>{"{.3}"}; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}}
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
(void)std::basic_format_string<wchar_t>{L"foo"};
(void)std::basic_format_string<wchar_t>{L"{}"}; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}}
(void)std::basic_format_string<wchar_t, int>{L"{0:{0}P}"}; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}}
(void)std::basic_format_string<wchar_t, int>{L"{0:{0}}"};
(void)std::basic_format_string<wchar_t, float>{L"{0:{0}}"}; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}}
(void)std::basic_format_string<wchar_t, int>{L"{.3}"}; // expected-error-re {{call to consteval function{{.*}}is not a constant expression}}
#endif
}
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