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 // format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n, 21 // const locale& loc, format-string<Args...> fmt, 22 // const Args&... args); 23 // template<class Out, class... Args> 24 // format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n, 25 // const locale& loc, wformat-string<Args...> fmt, 26 // const Args&... args); 27 28 #include <format> 29 #include <locale> 30 31 #include "test_macros.h" 32 33 extern char* out; 34 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 35 extern wchar_t* wout; 36 #endif 37 38 // clang-format off 39 40 void f() { 41 std::format_to_n(out, 42, std::locale(), "{"); // 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_n(out, 42, std::locale(), "}"); // 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_n(out, 42, std::locale(), "{}"); // 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_n(out, 42, std::locale(), "{0}"); // 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_n(out, 42, std::locale(), "{:-}", "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_n(out, 42, std::locale(), "{:#}", "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_n(out, 42, std::locale(), "{:L}", "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_n(out, 42, std::locale(), "{0:{0}}", "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 std::format_to_n(out, 42, std::locale(), "{:.42d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 66 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 67 68 std::format_to_n(out, 42, std::locale(), "{:d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 69 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 70 71 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 72 std::format_to_n(wout, 42, std::locale(), 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_n(wout, 42, std::locale(), L"}"); // 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_n(wout, 42, std::locale(), L"{}"); // 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_n(wout, 42, std::locale(), L"{0}"); // 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_n(wout, 42, std::locale(), 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_n(wout, 42, std::locale(), L"{:#}", 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_n(wout, 42, std::locale(), L"{:L}", 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_n(wout, 42, std::locale(), L"{0:{0}}", 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 96 std::format_to_n(wout, 42, std::locale(), L"{:.42d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 97 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 98 99 std::format_to_n(wout, 42, std::locale(), L"{:d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}} 100 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}} 101 #endif 102 } 103