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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libstdc++-v3/] [testsuite/] [25_algorithms/] [next_permutation/] [1.cc] - Rev 746
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// Copyright (C) 2005, 2009 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING3. If not see // <http://www.gnu.org/licenses/>. // 25.3.9 [lib.alg.permutation.generators] #include <algorithm> #include <testsuite_hooks.h> #include <testsuite_iterators.h> using __gnu_test::test_container; using __gnu_test::bidirectional_iterator_wrapper; using std::next_permutation; typedef test_container<int, bidirectional_iterator_wrapper> Container; void test1() { // Note: The standard is unclear on what should happen in this case. // This seems the only really sensible behaviour, and what is done. int array[] = {0}; Container con(array, array); VERIFY(!next_permutation(con.begin(), con.end())); } void test2() { int array[] = {0}; Container con(array, array + 1); VERIFY(!next_permutation(con.begin(), con.end())); } void test3() { int array[] = {0, 3}; Container con(array, array + 2); VERIFY(next_permutation(con.begin(), con.end())); VERIFY(array[0] == 3 && array[1] == 0); VERIFY(!next_permutation(con.begin(), con.end())); VERIFY(array[0] == 0 && array[1] == 3); } void test4() { int array[6] = {0, 1, 2, 3, 4, 5}; Container con(array, array + 6); for(int i = 0 ; i < 719; ++i) { int temp_array[6]; std::copy(array, array + 6, temp_array); VERIFY(next_permutation(array, array + 6)); VERIFY(std::lexicographical_compare(temp_array, temp_array + 6, array, array + 6)); } VERIFY(!next_permutation(array,array + 6)); for(int i = 0; i < 6; ++i) VERIFY(array[i] == i); } int main() { test1(); test2(); test3(); test4(); }
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