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 Out, class... Args> 20 // Out format_to(Out out, const locale& loc, 21 // format-string<Args...> fmt, const Args&... args); 22 // template<class Out, class... Args> 23 // Out format_to(Out out, 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 extern char* out; 32 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 33 extern wchar_t* wout; 34 #endif 35 36 // clang-format off 37 38 void f() { 39 std::format_to(out, std::locale(), "{"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 40 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 41 42 std::format_to(out, std::locale(), "}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 43 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 44 45 std::format_to(out, std::locale(), "{}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 46 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 47 48 std::format_to(out, std::locale(), "{0}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 49 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 50 51 std::format_to(out, std::locale(), "{:-}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 52 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 53 54 std::format_to(out, std::locale(), "{:#}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 55 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 56 57 std::format_to(out, std::locale(), "{:L}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 58 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 59 60 std::format_to(out, std::locale(), "{0:{0}}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 61 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 62 63 std::format_to(out, std::locale(), "{:.42d}", "Forty-two"); // 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 std::format_to(out, std::locale(), "{:d}", "Forty-two"); // 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 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 70 std::format_to(wout, std::locale(), L"{"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 71 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 72 73 std::format_to(wout, std::locale(), L"}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 74 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 75 76 std::format_to(wout, std::locale(), L"{}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 77 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 78 79 std::format_to(wout, std::locale(), L"{0}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 80 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 81 82 std::format_to(wout, std::locale(), L"{:-}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 83 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 84 85 std::format_to(wout, std::locale(), L"{:#}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 86 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 87 88 std::format_to(wout, std::locale(), L"{:L}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 89 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 90 91 std::format_to(wout, std::locale(), L"{0:{0}}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 92 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 93 94 std::format_to(wout, std::locale(), L"{:.42d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 95 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 96 97 std::format_to(wout, std::locale(), L"{:d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 98 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 99 #endif 100 } 101