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 // string format(const locale& loc, format-string<Args...> fmt, const Args&... args); 21 // template<class... Args> 22 // wstring format(const locale& loc, wformat-string<Args...> fmt, const Args&... args); 23 24 #include <format> 25 #include <locale> 26 27 #include "test_macros.h" 28 29 // clang-format off 30 31 void f() { 32 TEST_IGNORE_NODISCARD std::format(std::locale(), "{"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 33 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 34 35 TEST_IGNORE_NODISCARD std::format(std::locale(), "}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 36 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 37 38 TEST_IGNORE_NODISCARD std::format(std::locale(), "{}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 39 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 40 41 TEST_IGNORE_NODISCARD std::format(std::locale(), "{0}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 42 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 43 44 TEST_IGNORE_NODISCARD std::format(std::locale(), "{:-}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 45 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 46 47 TEST_IGNORE_NODISCARD std::format(std::locale(), "{:#}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 48 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 49 50 TEST_IGNORE_NODISCARD std::format(std::locale(), "{:L}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 51 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 52 53 TEST_IGNORE_NODISCARD std::format(std::locale(), "{0:{0}}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 54 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 55 56 TEST_IGNORE_NODISCARD std::format(std::locale(), "{:.42d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 57 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 58 59 TEST_IGNORE_NODISCARD std::format(std::locale(), "{:d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 60 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 61 62 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 63 TEST_IGNORE_NODISCARD std::format(std::locale(), L"{"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 64 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 65 66 TEST_IGNORE_NODISCARD std::format(std::locale(), L"}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 67 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 68 69 TEST_IGNORE_NODISCARD std::format(std::locale(), L"{}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 70 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 71 72 TEST_IGNORE_NODISCARD std::format(std::locale(), L"{0}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 73 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 74 75 TEST_IGNORE_NODISCARD std::format(std::locale(), L"{:-}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 76 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 77 78 TEST_IGNORE_NODISCARD std::format(std::locale(), L"{:#}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 79 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 80 81 TEST_IGNORE_NODISCARD std::format(std::locale(), L"{:L}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 82 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 83 84 TEST_IGNORE_NODISCARD std::format(std::locale(), L"{0:{0}}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 85 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 86 87 TEST_IGNORE_NODISCARD std::format(std::locale(), L"{:.42d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 88 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 89 90 TEST_IGNORE_NODISCARD std::format(std::locale(), L"{:d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 91 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 92 #endif 93 } 94