libstdc++-v3/testsuite/23_containers/set/modifiers/emplace/1.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2012-2025 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 #include <vector>
  21 #include <set>
  22 #include <testsuite_hooks.h>
  23
  24 class PathPoint
  25 {
  26 public:
  27   PathPoint(char t, const std::vector<double>& c)
  28   : type(t), coords(c) { }
  29   PathPoint(char t, std::vector<double>&& c)
  30   : type(t), coords(std::move(c)) { }
  31   char getType() const { return type; }
  32   const std::vector<double>& getCoords() const { return coords; }
  33 private:
  34   char type;
  35   std::vector<double> coords;
  36 };
  37
  38 struct PathPointLess
  39 {
  40   bool operator() (const PathPoint& __lhs, const PathPoint& __rhs) const
  41   { return __lhs.getType() < __rhs.getType(); }
  42 };
  43
  44 void test01()
  45 {
  46   typedef std::set<PathPoint, PathPointLess> Set;
  47   Set s;
  48
  49   std::vector<double> coord1 = { 0.0, 1.0, 2.0 };
  50
  51   auto ret = s.emplace('a', coord1);
  52   VERIFY( ret.second );
  53   VERIFY( s.size() == 1 );
  54   VERIFY( ret.first->getType() == 'a' );
  55
  56   coord1[0] = 3.0;
  57   ret = s.emplace('a', coord1);
  58   VERIFY( !ret.second );
  59   VERIFY( s.size() == 1 );
  60   VERIFY( ret.first->getType() == 'a' );
  61   VERIFY( ret.first->getCoords()[0] == 0.0 );
  62
  63   auto it = s.emplace_hint(s.begin(), 'b', coord1);
  64   VERIFY( it != s.end() );
  65   VERIFY( it->getType() == 'b' );
  66   VERIFY( it->getCoords()[0] == 3.0 );
  67
  68   double *px = &coord1[0];
  69   ret = s.emplace('c', std::move(coord1));
  70   VERIFY( ret.second );
  71   VERIFY( ret.first->getType() == 'c' );
  72   VERIFY( &(ret.first->getCoords()[0]) == px );
  73 }
  74
  75 int main()
  76 {
  77   test01();
  78   return 0;
  79 }