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

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2011-2020 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 // range insert
  21
  22 #include <utility>
  23 #include <tuple>
  24 #include <vector>
  25 #include <unordered_map>
  26 #include <testsuite_hooks.h>
  27
  28 class PathPoint
  29 {
  30 public:
  31   PathPoint(char t, const std::vector<double>& c)
  32     : type(t), coords(c) { }
  33   PathPoint(char t, std::vector<double>&& c)
  34     : type(t), coords(std::move(c)) { }
  35   char getType() const { return type; }
  36   const std::vector<double>& getCoords() const { return coords; }
  37 private:
  38   char type;
  39   std::vector<double> coords;
  40 };
  41
  42 void test01()
  43 {
  44   typedef std::unordered_map<char, std::vector<double>> Map;
  45   Map m;
  46
  47   std::vector<double> coord1 = { 0.0, 1.0, 2.0 };
  48
  49   auto ret = m.emplace('a', coord1);
  50   VERIFY( ret.second );
  51   VERIFY( m.size() == 1 );
  52   VERIFY( ret.first->first == 'a' );
  53
  54   coord1[0] = 3.0;
  55   ret = m.emplace('a', coord1);
  56   VERIFY( !ret.second );
  57   VERIFY( m.size() == 1 );
  58   VERIFY( ret.first->first == 'a' );
  59   VERIFY( ret.first->second[0] == 0.0 );
  60
  61   auto it = m.emplace_hint(m.begin(), 'b', coord1);
  62   VERIFY( it != m.end() );
  63   VERIFY( it->first == 'b' );
  64   VERIFY( it->second[0] == 3.0 );
  65
  66   double *px = &coord1[0];
  67   ret = m.emplace('c', std::move(coord1));
  68   VERIFY( ret.second );
  69   VERIFY( ret.first->first == 'c' );
  70   VERIFY( &(ret.first->second[0]) == px );
  71 }
  72
  73 void test02()
  74 {
  75   using namespace std;
  76   typedef unordered_map<char, PathPoint> Map;
  77   Map m;
  78
  79   std::vector<double> coord1 = { 0.0, 1.0, 2.0 };
  80
  81   auto ret = m.emplace(piecewise_construct,
  82                        make_tuple('a'), make_tuple('a', coord1));
  83   VERIFY( ret.second );
  84   VERIFY( m.size() == 1 );
  85   VERIFY( ret.first->first == 'a' );
  86
  87   coord1[0] = 3.0;
  88   ret = m.emplace(piecewise_construct,
  89                   make_tuple('a'), make_tuple( 'b', coord1));
  90   VERIFY( !ret.second );
  91   VERIFY( m.size() == 1 );
  92   VERIFY( ret.first->first == 'a' );
  93   VERIFY( ret.first->second.getCoords()[0] == 0.0 );
  94
  95   auto it = m.emplace_hint(m.begin(), piecewise_construct,
  96                            make_tuple('b'), make_tuple('c', coord1));
  97   VERIFY( it != m.end() );
  98   VERIFY( it->first == 'b' );
  99   VERIFY( it->second.getCoords()[0] == 3.0 );
 100
 101   double *px = &coord1[0];
 102   ret = m.emplace(piecewise_construct,
 103                   make_tuple('c'), make_tuple('d', move(coord1)));
 104   VERIFY( ret.second );
 105   VERIFY( ret.first->first == 'c' );
 106   VERIFY( &(ret.first->second.getCoords()[0]) == px );
 107 }
 108
 109 int main()
 110 {
 111   test01();
 112   test02();
 113   return 0;
 114 }