libcxx/test/std/containers/unord/unord.map/unord.map.elem/at.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <unordered_map>
  10
  11 // template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
  12 //           class Alloc = allocator<pair<const Key, T>>>
  13 // class unordered_map
  14
  15 // mapped_type&       at(const key_type& k);
  16 // const mapped_type& at(const key_type& k) const;
  17
  18 #include <cassert>
  19 #include <stdexcept>
  20 #include <string>
  21 #include <unordered_map>
  22
  23 #include "MoveOnly.h"
  24 #include "min_allocator.h"
  25 #include "test_macros.h"
  26
  27 int main(int, char**)
  28 {
  29     {
  30         typedef std::unordered_map<int, std::string> C;
  31         typedef std::pair<int, std::string> P;
  32         P a[] =
  33         {
  34             P(1, "one"),
  35             P(2, "two"),
  36             P(3, "three"),
  37             P(4, "four"),
  38             P(1, "four"),
  39             P(2, "four"),
  40         };
  41         C c(a, a + sizeof(a)/sizeof(a[0]));
  42         assert(c.size() == 4);
  43         c.at(1) = "ONE";
  44         assert(c.at(1) == "ONE");
  45 #ifndef TEST_HAS_NO_EXCEPTIONS
  46         try
  47         {
  48             c.at(11) = "eleven";
  49             assert(false);
  50         }
  51         catch (std::out_of_range&)
  52         {
  53         }
  54         assert(c.size() == 4);
  55 #endif
  56     }
  57     {
  58         typedef std::unordered_map<int, std::string> C;
  59         typedef std::pair<int, std::string> P;
  60         P a[] =
  61         {
  62             P(1, "one"),
  63             P(2, "two"),
  64             P(3, "three"),
  65             P(4, "four"),
  66             P(1, "four"),
  67             P(2, "four"),
  68         };
  69         const C c(a, a + sizeof(a)/sizeof(a[0]));
  70         assert(c.size() == 4);
  71         assert(c.at(1) == "one");
  72 #ifndef TEST_HAS_NO_EXCEPTIONS
  73         try
  74         {
  75             TEST_IGNORE_NODISCARD c.at(11);
  76             assert(false);
  77         }
  78         catch (std::out_of_range&)
  79         {
  80         }
  81         assert(c.size() == 4);
  82 #endif
  83     }
  84 #if TEST_STD_VER >= 11
  85     {
  86         typedef std::unordered_map<int, std::string, std::hash<int>, std::equal_to<int>,
  87                             min_allocator<std::pair<const int, std::string>>> C;
  88         typedef std::pair<int, std::string> P;
  89         P a[] =
  90         {
  91             P(1, "one"),
  92             P(2, "two"),
  93             P(3, "three"),
  94             P(4, "four"),
  95             P(1, "four"),
  96             P(2, "four"),
  97         };
  98         C c(a, a + sizeof(a)/sizeof(a[0]));
  99         assert(c.size() == 4);
 100         c.at(1) = "ONE";
 101         assert(c.at(1) == "ONE");
 102 #ifndef TEST_HAS_NO_EXCEPTIONS
 103         try
 104         {
 105             c.at(11) = "eleven";
 106             assert(false);
 107         }
 108         catch (std::out_of_range&)
 109         {
 110         }
 111         assert(c.size() == 4);
 112 #endif
 113     }
 114     {
 115         typedef std::unordered_map<int, std::string, std::hash<int>, std::equal_to<int>,
 116                             min_allocator<std::pair<const int, std::string>>> C;
 117         typedef std::pair<int, std::string> P;
 118         P a[] =
 119         {
 120             P(1, "one"),
 121             P(2, "two"),
 122             P(3, "three"),
 123             P(4, "four"),
 124             P(1, "four"),
 125             P(2, "four"),
 126         };
 127         const C c(a, a + sizeof(a)/sizeof(a[0]));
 128         assert(c.size() == 4);
 129         assert(c.at(1) == "one");
 130 #ifndef TEST_HAS_NO_EXCEPTIONS
 131         try
 132         {
 133             TEST_IGNORE_NODISCARD c.at(11);
 134             assert(false);
 135         }
 136         catch (std::out_of_range&)
 137         {
 138         }
 139         assert(c.size() == 4);
 140 #endif
 141     }
 142 #endif
 143
 144   return 0;
 145 }