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 11 // TODO FMT This test should not require std::to_chars(floating-point) 12 // XFAIL: availability-fp_to_chars-missing 13 14 // <format> 15 16 // Basic test to validate ill-formed code is properly detected. 17 18 // template<class Out, class... Args> 19 // Out format_to(Out out, format-string<Args...> fmt, const Args&... args); 20 // template<class Out, class... Args> 21 // Out format_to(Out out, wformat-string<Args...> fmt, const Args&... args); 22 23 #include <format> 24 25 #include "test_macros.h" 26 27 extern char* out; 28 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 29 extern wchar_t* wout; 30 #endif 31 32 // clang-format off 33 34 void f() { 35 std::format_to(out, "{"); // 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 std::format_to(out, "}"); // 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 std::format_to(out, "{}"); // 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 std::format_to(out, "{0}"); // 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 std::format_to(out, "{:-}", "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 std::format_to(out, "{:#}", "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 std::format_to(out, "{:L}", "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 std::format_to(out, "{0:{0}}", "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 std::format_to(out, "{:.42d}", "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 std::format_to(out, "{:d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 63 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 64 65 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 66 std::format_to(wout, 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 std::format_to(wout, 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 std::format_to(wout, L"{}"); // 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 std::format_to(wout, L"{0}"); // 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 std::format_to(wout, 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 std::format_to(wout, 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 std::format_to(wout, L"{:L}", 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 std::format_to(wout, L"{0:{0}}", 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 std::format_to(wout, L"{:.42d}", 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 93 std::format_to(wout, L"{:d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 94 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 95 #endif 96 } 97