libcxx/test/std/utilities/format/format.arguments/format.args/ctad.compile.pass.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
  11 // <format>
  12
  13 // template<class Context, class... Args>
  14 //   basic_format_args(format-arg-store<Context, Args...>) -> basic_format_args<Context>;
  15
  16 #include <concepts>
  17 #include <format>
  18
  19 #include "test_macros.h"
  20
  21 void test() {
  22   int i = 1;
  23   // Note the Standard way to create a format-arg-store is by using make_format_args.
  24   static_assert(std::same_as<decltype(std::basic_format_args(std::make_format_args(i))),
  25                              std::basic_format_args<std::format_context>>);
  26
  27 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  28   static_assert(std::same_as<decltype(std::basic_format_args(std::make_wformat_args(i))),
  29                              std::basic_format_args<std::wformat_context>>);
  30
  31 #endif
  32 }