libcxx/test/std/strings/basic.string/string.cons/initializer_list.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
  10
  11 // <string>
  12
  13 // basic_string(initializer_list<charT> il, const Allocator& a = Allocator()); // constexpr since C++20
  14
  15 #include <string>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19 #include "test_allocator.h"
  20 #include "min_allocator.h"
  21
  22 // clang-format off
  23 template <template <class> class Alloc>
  24 TEST_CONSTEXPR_CXX20 void test_string() {
  25   {
  26     std::basic_string<char, std::char_traits<char>, Alloc<char> > s = {'a', 'b', 'c'};
  27     assert(s == "abc");
  28   }
  29 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  30   {
  31     std::basic_string<wchar_t, std::char_traits<wchar_t>, Alloc<wchar_t> > s = {L'a', L'b', L'c'};
  32     assert(s == L"abc");
  33   }
  34 #endif
  35 }
  36 // clang-format on
  37
  38 TEST_CONSTEXPR_CXX20 bool test() {
  39   test_string<std::allocator>();
  40   test_string<min_allocator>();
  41
  42   return true;
  43 }
  44
  45 int main(int, char**) {
  46   test();
  47 #if TEST_STD_VER > 17
  48   static_assert(test());
  49 #endif
  50
  51   return 0;
  52 }