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

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2011-2024 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 // range insert
  21
  22 #include <tuple>
  23 #include <vector>
  24 #include <unordered_map>
  25 #include <testsuite_hooks.h>
  26
  27 class PathPoint
  28 {
  29 public:
  30   PathPoint(char t, const std::vector<double>& c)
  31   : type(t), coords(c) { }
  32   PathPoint(char t, std::vector<double>&& c)
  33   : type(t), coords(std::move(c)) { }
  34   char getType() const { return type; }
  35   const std::vector<double>& getCoords() const { return coords; }
  36 private:
  37   char type;
  38   std::vector<double> coords;
  39 };
  40
  41 void test01()
  42 {
  43   typedef std::unordered_multimap<char, std::vector<double>> MMap;
  44   MMap mm;
  45
  46   std::vector<double> coord1 = { 0.0, 1.0, 2.0 };
  47
  48   auto it = mm.emplace('a', coord1);
  49   VERIFY( mm.size() == 1 );
  50   VERIFY( it->first == 'a' );
  51
  52   coord1[0] = 3.0;
  53   it = mm.emplace('a', coord1);
  54   VERIFY( mm.size() == 2 );
  55   VERIFY( it->first == 'a' );
  56   VERIFY( it->second[0] == 3.0 );
  57
  58   it = mm.emplace_hint(mm.begin(), 'b', coord1);
  59   VERIFY( it != mm.end() );
  60   VERIFY( it->first == 'b' );
  61   VERIFY( it->second[0] == 3.0 );
  62
  63   double *px = &coord1[0];
  64   it = mm.emplace('c', std::move(coord1));
  65   VERIFY( it->first == 'c' );
  66   VERIFY( &(it->second[0]) == px );
  67 }
  68
  69 void test02()
  70 {
  71   using namespace std;
  72   typedef unordered_multimap<char, PathPoint> Map;
  73   Map m;
  74
  75   std::vector<double> coord1 = { 0.0, 1.0, 2.0 };
  76
  77   auto it = m.emplace(piecewise_construct,
  78                        make_tuple('a'), make_tuple('a', coord1));
  79   VERIFY( m.size() == 1 );
  80   VERIFY( it->first == 'a' );
  81
  82   coord1[0] = 3.0;
  83   it = m.emplace(piecewise_construct,
  84                   make_tuple('a'), make_tuple( 'b', coord1));
  85   VERIFY( m.size() == 2 );
  86   VERIFY( it->first == 'a' );
  87   VERIFY( it->second.getCoords()[0] == 3.0 );
  88
  89   it = m.emplace_hint(m.begin(), piecewise_construct,
  90                       make_tuple('b'), make_tuple('c', coord1));
  91   VERIFY( it != m.end() );
  92   VERIFY( it->first == 'b' );
  93   VERIFY( it->second.getCoords()[0] == 3.0 );
  94
  95   double *px = &coord1[0];
  96   it = m.emplace(piecewise_construct,
  97                   make_tuple('c'), make_tuple('d', move(coord1)));
  98   VERIFY( it->first == 'c' );
  99   VERIFY( &(it->second.getCoords()[0]) == px );
 100 }
 101
 102
 103 int main()
 104 {
 105   test01();
 106   test02();
 107   return 0;
 108 }