libcxx/test/std/strings/basic.string/string.cons/copy.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 // <string>
  10
  11 // basic_string(const basic_string<charT,traits,Allocator>& str); // constexpr since C++20
  12
  13 #include <string>
  14 #include <cassert>
  15
  16 #include "test_macros.h"
  17 #include "test_allocator.h"
  18 #include "min_allocator.h"
  19
  20 template <class S>
  21 TEST_CONSTEXPR_CXX20 void test(S s1) {
  22   S s2 = s1;
  23   LIBCPP_ASSERT(s2.__invariants());
  24   assert(s2 == s1);
  25   assert(s2.capacity() >= s2.size());
  26   assert(s2.get_allocator() == s1.get_allocator());
  27 }
  28
  29 template <class Alloc>
  30 TEST_CONSTEXPR_CXX20 void test_string(const Alloc& a) {
  31   typedef std::basic_string<char, std::char_traits<char>, Alloc> S;
  32   test(S(Alloc(a)));
  33   test(S("1", Alloc(a)));
  34   test(S("1234567890123456789012345678901234567890123456789012345678901234567890", Alloc(a)));
  35 }
  36
  37 TEST_CONSTEXPR_CXX20 bool test() {
  38   test_string(std::allocator<char>());
  39   test_string(test_allocator<char>());
  40   test_string(test_allocator<char>(3));
  41 #if TEST_STD_VER >= 11
  42   test_string(min_allocator<char>());
  43 #endif
  44
  45   return true;
  46 }
  47
  48 int main(int, char**) {
  49   test();
  50 #if TEST_STD_VER > 17
  51   static_assert(test());
  52 #endif
  53
  54   return 0;
  55 }