libcxx/test/std/strings/basic.string/string.modifiers/string_assign/pointer.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>& assign(const charT* s);
  12
  13 #include <string>
  14 #include <stdexcept>
  15 #include <cassert>
  16
  17 #include "test_macros.h"
  18 #include "min_allocator.h"
  19
  20 template <class S>
  21 void
  22 test(S s, const typename S::value_type* str, S expected)
  23 {
  24     s.assign(str);
  25     LIBCPP_ASSERT(s.__invariants());
  26     assert(s == expected);
  27 }
  28
  29 int main(int, char**)
  30 {
  31     {
  32     typedef std::string S;
  33     test(S(), "", S());
  34     test(S(), "12345", S("12345"));
  35     test(S(), "12345678901234567890", S("12345678901234567890"));
  36
  37     test(S("12345"), "", S());
  38     test(S("12345"), "12345", S("12345"));
  39     test(S("12345"), "1234567890", S("1234567890"));
  40
  41     test(S("12345678901234567890"), "", S());
  42     test(S("12345678901234567890"), "12345", S("12345"));
  43     test(S("12345678901234567890"), "12345678901234567890",
  44          S("12345678901234567890"));
  45     }
  46 #if TEST_STD_VER >= 11
  47     {
  48     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
  49     test(S(), "", S());
  50     test(S(), "12345", S("12345"));
  51     test(S(), "12345678901234567890", S("12345678901234567890"));
  52
  53     test(S("12345"), "", S());
  54     test(S("12345"), "12345", S("12345"));
  55     test(S("12345"), "1234567890", S("1234567890"));
  56
  57     test(S("12345678901234567890"), "", S());
  58     test(S("12345678901234567890"), "12345", S("12345"));
  59     test(S("12345678901234567890"), "12345678901234567890",
  60          S("12345678901234567890"));
  61     }
  62 #endif
  63
  64     { // test assignment to self
  65     typedef std::string S;
  66     S s_short = "123/";
  67     S s_long  = "Lorem ipsum dolor sit amet, consectetur/";
  68
  69     s_short.assign(s_short.c_str());
  70     assert(s_short == "123/");
  71     s_short.assign(s_short.c_str() + 2);
  72     assert(s_short == "3/");
  73
  74     s_long.assign(s_long.c_str() + 30);
  75     assert(s_long == "nsectetur/");
  76     }
  77
  78   return 0;
  79 }