libcxx/test/std/strings/basic.string/string.cons/pointer_assignment.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<charT,traits,Allocator>&
  12 //   operator=(const charT* s); // constexpr since C++20
  13
  14 #include <string>
  15 #include <cassert>
  16
  17 #include "test_macros.h"
  18 #include "min_allocator.h"
  19 #include "asan_testing.h"
  20
  21 template <class S>
  22 TEST_CONSTEXPR_CXX20 void test(S s1, const typename S::value_type* s2) {
  23   typedef typename S::traits_type T;
  24   s1 = s2;
  25   LIBCPP_ASSERT(s1.__invariants());
  26   assert(s1.size() == T::length(s2));
  27   assert(T::compare(s1.data(), s2, s1.size()) == 0);
  28   assert(s1.capacity() >= s1.size());
  29   LIBCPP_ASSERT(is_string_asan_correct(s1));
  30 }
  31
  32 template <class S>
  33 TEST_CONSTEXPR_CXX20 void test_string() {
  34   test(S(), "");
  35   test(S("1"), "");
  36   test(S(), "1");
  37   test(S("1"), "2");
  38   test(S("1"), "2");
  39
  40   test(S(), "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
  41   test(S("123456789"), "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
  42   test(S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"), "123456789");
  43   test(S("1234567890123456789012345678901234567890123456789012345678901234567890"),
  44        "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
  45   test(S("1234567890123456789012345678901234567890123456789012345678901234567890"
  46          "1234567890123456789012345678901234567890123456789012345678901234567890"),
  47        "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
  48 }
  49
  50 TEST_CONSTEXPR_CXX20 bool test() {
  51   test_string<std::string>();
  52 #if TEST_STD_VER >= 11
  53   test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
  54   test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
  55 #endif
  56
  57   return true;
  58 }
  59
  60 int main(int, char**) {
  61   test();
  62 #if TEST_STD_VER > 17
  63   static_assert(test());
  64 #endif
  65
  66   return 0;
  67 }