libcxx/test/std/utilities/format/format.functions/format.locale.verify.cpp

   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 }