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

   1 // { dg-options "-std=gnu++11" }
   2
   3 // Copyright (C) 2011-2016 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 bool test __attribute__((unused)) = true;
  43
  44 void test01()
  45 {
  46   typedef std::unordered_map<char, std::vector<double>> Map;
  47   Map m;
  48
  49   std::vector<double> coord1 = { 0.0, 1.0, 2.0 };
  50
  51   auto ret = m.emplace('a', coord1);
  52   VERIFY( ret.second );
  53   VERIFY( m.size() == 1 );
  54   VERIFY( ret.first->first == 'a' );
  55
  56   coord1[0] = 3.0;
  57   ret = m.emplace('a', coord1);
  58   VERIFY( !ret.second );
  59   VERIFY( m.size() == 1 );
  60   VERIFY( ret.first->first == 'a' );
  61   VERIFY( ret.first->second[0] == 0.0 );
  62
  63   auto it = m.emplace_hint(m.begin(), 'b', coord1);
  64   VERIFY( it != m.end() );
  65   VERIFY( it->first == 'b' );
  66   VERIFY( it->second[0] == 3.0 );
  67
  68   double *px = &coord1[0];
  69   ret = m.emplace('c', std::move(coord1));
  70   VERIFY( ret.second );
  71   VERIFY( ret.first->first == 'c' );
  72   VERIFY( &(ret.first->second[0]) == px );
  73 }
  74
  75 void test02()
  76 {
  77   using namespace std;
  78   typedef unordered_map<char, PathPoint> Map;
  79   Map m;
  80
  81   std::vector<double> coord1 = { 0.0, 1.0, 2.0 };
  82
  83   auto ret = m.emplace(piecewise_construct,
  84                        make_tuple('a'), make_tuple('a', coord1));
  85   VERIFY( ret.second );
  86   VERIFY( m.size() == 1 );
  87   VERIFY( ret.first->first == 'a' );
  88
  89   coord1[0] = 3.0;
  90   ret = m.emplace(piecewise_construct,
  91                   make_tuple('a'), make_tuple( 'b', coord1));
  92   VERIFY( !ret.second );
  93   VERIFY( m.size() == 1 );
  94   VERIFY( ret.first->first == 'a' );
  95   VERIFY( ret.first->second.getCoords()[0] == 0.0 );
  96
  97   auto it = m.emplace_hint(m.begin(), piecewise_construct,
  98                            make_tuple('b'), make_tuple('c', coord1));
  99   VERIFY( it != m.end() );
 100   VERIFY( it->first == 'b' );
 101   VERIFY( it->second.getCoords()[0] == 3.0 );
 102
 103   double *px = &coord1[0];
 104   ret = m.emplace(piecewise_construct,
 105                   make_tuple('c'), make_tuple('d', move(coord1)));
 106   VERIFY( ret.second );
 107   VERIFY( ret.first->first == 'c' );
 108   VERIFY( &(ret.first->second.getCoords()[0]) == px );
 109 }
 110
 111 int main()
 112 {
 113   test01();
 114   test02();
 115   return 0;
 116 }