libcxx/test/std/strings/basic.string/string.modifiers/string_op_plus_equal/char.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>& operator+=(charT c);
  12
  13 #include <string>
  14 #include <cassert>
  15
  16 #include "test_macros.h"
  17 #include "min_allocator.h"
  18
  19 template <class S>
  20 void
  21 test(S s, typename S::value_type str, S expected)
  22 {
  23     s += str;
  24     LIBCPP_ASSERT(s.__invariants());
  25     assert(s == expected);
  26 }
  27
  28 int main(int, char**)
  29 {
  30     {
  31     typedef std::string S;
  32     test(S(), 'a', S("a"));
  33     test(S("12345"), 'a', S("12345a"));
  34     test(S("1234567890"), 'a', S("1234567890a"));
  35     test(S("12345678901234567890"), 'a', S("12345678901234567890a"));
  36     }
  37 #if TEST_STD_VER >= 11
  38     {
  39     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
  40     test(S(), 'a', S("a"));
  41     test(S("12345"), 'a', S("12345a"));
  42     test(S("1234567890"), 'a', S("1234567890a"));
  43     test(S("12345678901234567890"), 'a', S("12345678901234567890a"));
  44     }
  45 #endif
  46
  47   return 0;
  48 }