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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/23_containers/map/erasure.cc
1 // { dg-options "-std=gnu++2a" }
2 // { dg-do run { target c++2a } }
4 // Copyright (C) 2018-2022 Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING3. If not see
19 // <http://www.gnu.org/licenses/>.
23 #include <testsuite_hooks.h>
25 #ifndef __cpp_lib_erase_if
26 # error "Feature-test macro for erase_if missing in <map>"
27 #elif __cpp_lib_erase_if < 202002
28 # error "Feature-test macro for erase_if has wrong value in <map>"
31 auto is_odd_pair
= [](const std::pair
<const int, std::string
>& p
)
33 return p
.first
% 2 != 0;
39 std::map
<int, std::string
> m
{ { 10, "A" }, { 11, "B" },
40 { 12, "C" }, { 14, "D" },
41 { 15, "E" }, { 17, "F" },
42 { 18, "G" }, { 19, "H" } };
43 auto num
= std::erase_if(m
, is_odd_pair
);
44 std::map
<int, std::string
> t
{ { 10, "A" }, { 12, "C" },
45 { 14, "D" }, { 18, "G" } };
53 std::multimap
<int, std::string
> mm
{ { 20, "S" }, { 21, "T" },
54 { 22, "U" }, { 22, "V" },
55 { 23, "W" }, { 23, "X" },
56 { 24, "Y" }, { 25, "Z" } };
57 auto num
= std::erase_if(mm
, is_odd_pair
);
58 std::multimap
<int, std::string
> t
{ { 20, "S" }, { 22, "U" },
59 { 22, "V" }, { 24, "Y" } };