libstdc++-v3/testsuite/21_strings/basic_string/modifiers/assign/char/4.cc

   1 // { dg-options "-std=gnu++17" }
   2
   3 // Copyright (C) 2016-2020 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // [string.modifiers]
  21
  22 #include <string>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test03()
  27 {
  28   std::string_view str1("foo");
  29   std::string str2;
  30   str2.assign(str1);
  31   VERIFY (str2 == str1);
  32   std::string str4;
  33   str4.assign(str1, 1, 2);
  34   VERIFY (str4 == "oo");
  35 }
  36
  37 // PR libstdc++/77264
  38 void
  39 test04()
  40 {
  41   std::string str("a");
  42   char c = 'b';
  43   str.assign(&c, 1);
  44   VERIFY (str[0] == c);
  45
  46   char arr[] = "c";
  47   str.assign(arr, 1);
  48   VERIFY (str[0] == arr[0]);
  49
  50   const char carr[] = "d";
  51   str.assign(carr, 1);
  52   VERIFY (str[0] == carr[0]);
  53
  54   struct S {
  55     operator char*() { return &c; }
  56     operator std::string_view() { return "!"; }
  57     char c = 'e';
  58   };
  59
  60   str.assign(S{}, 1);
  61   VERIFY (str[0] == S{}.c);
  62 }
  63
  64 int main()
  65 {
  66   test03();
  67   test04();
  68   return 0;
  69 }