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

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2012-2024 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 <utility>
  21 #include <tuple>
  22 #include <vector>
  23 #include <map>
  24 #include <testsuite_hooks.h>
  25
  26 class PathPoint
  27 {
  28 public:
  29   PathPoint(char t, const std::vector<double>& c)
  30     : type(t), coords(c) { }
  31   PathPoint(char t, std::vector<double>&& c)
  32     : type(t), coords(std::move(c)) { }
  33   char getType() const { return type; }
  34   const std::vector<double>& getCoords() const { return coords; }
  35 private:
  36   char type;
  37   std::vector<double> coords;
  38 };
  39
  40 void test01()
  41 {
  42   typedef std::map<char, std::vector<double>> Map;
  43   Map m;
  44
  45   std::vector<double> coord1 = { 0.0, 1.0, 2.0 };
  46
  47   auto ret = m.emplace('a', coord1);
  48   VERIFY( ret.second );
  49   VERIFY( m.size() == 1 );
  50   VERIFY( ret.first->first == 'a' );
  51
  52   coord1[0] = 3.0;
  53   ret = m.emplace('a', coord1);
  54   VERIFY( !ret.second );
  55   VERIFY( m.size() == 1 );
  56   VERIFY( ret.first->first == 'a' );
  57   VERIFY( ret.first->second[0] == 0.0 );
  58
  59   auto it = m.emplace_hint(m.begin(), 'b', coord1);
  60   VERIFY( it != m.end() );
  61   VERIFY( it->first == 'b' );
  62   VERIFY( it->second[0] == 3.0 );
  63
  64   double *px = &coord1[0];
  65   ret = m.emplace('c', std::move(coord1));
  66   VERIFY( ret.second );
  67   VERIFY( ret.first->first == 'c' );
  68   VERIFY( &(ret.first->second[0]) == px );
  69 }
  70
  71 void test02()
  72 {
  73   using namespace std;
  74   typedef map<char, PathPoint> Map;
  75   Map m;
  76
  77   vector<double> coord1 = { 0.0, 1.0, 2.0 };
  78
  79   auto ret = m.emplace(piecewise_construct,
  80                        make_tuple('a'), make_tuple('a', coord1));
  81   VERIFY( ret.second );
  82   VERIFY( m.size() == 1 );
  83   VERIFY( ret.first->first == 'a' );
  84
  85   coord1[0] = 3.0;
  86   ret = m.emplace(piecewise_construct,
  87                   make_tuple('a'), make_tuple( 'b', coord1));
  88   VERIFY( !ret.second );
  89   VERIFY( m.size() == 1 );
  90   VERIFY( ret.first->first == 'a' );
  91   VERIFY( ret.first->second.getCoords()[0] == 0.0 );
  92
  93   auto it = m.emplace_hint(m.begin(), piecewise_construct,
  94                            make_tuple('b'), make_tuple('c', coord1));
  95   VERIFY( it != m.end() );
  96   VERIFY( it->first == 'b' );
  97   VERIFY( it->second.getCoords()[0] == 3.0 );
  98
  99   double *px = &coord1[0];
 100   ret = m.emplace(piecewise_construct,
 101                   make_tuple('c'), make_tuple('d', move(coord1)));
 102   VERIFY( ret.second );
 103   VERIFY( ret.first->first == 'c' );
 104   VERIFY( &(ret.first->second.getCoords()[0]) == px );
 105 }
 106
 107 int main()
 108 {
 109   test01();
 110   test02();
 111   return 0;
 112 }