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1 // Copyright (C) 2001-2016 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
18 // 25.3.1 algorithms, sort()
21 #include <testsuite_hooks.h>
23 bool test
__attribute__((unused
)) = true;
25 const int A
[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20};
26 const int B
[] = {10, 20, 1, 11, 2, 12, 3, 13, 4, 14, 5, 15, 6, 16, 7, 17, 8, 18, 9, 19};
27 const int C
[] = {20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
28 const int N
= sizeof(A
) / sizeof(int);
29 const int logN
= 3; // ln(N) rounded up
32 // comparison predicate for stable_sort: order by rightmost digit
36 operator()(const int x
, const int y
)
37 { return x
% 10 < y
% 10; }
40 // This functor has the equivalent functionality of std::geater<>,
41 // but there is no dependency on <functional> and it also tracks the
42 // number of invocations since creation.
46 static int count() { return itsCount
; }
47 static void reset() { itsCount
= 0; }
50 operator()(const int& x
, const int& y
)
63 // 25.3.1.4 partial_sort_copy()
67 using std::partial_sort_copy
;
70 std::copy(B
, B
+ N
, s1
);
71 VERIFY(std::equal(s1
, s1
+ N
, B
));
75 partial_sort_copy(s1
, s1
+ N
, s2
, s2
+ P
);
76 VERIFY(std::equal(s2
, s2
+ P
, A
));
80 partial_sort_copy(s1
, s1
+ N
, s2
, s2
+ P
, gt
);
81 VERIFY(std::equal(s2
, s2
+ P
, C
));
83 VERIFY(std::equal(s2
, partial_sort_copy(s1
, s1
+ N
, s2
, s2
+ 2*N
), A
));