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74 lines
1.7 KiB
C++
74 lines
1.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// test bitset<N>& flip(size_t pos);
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#include <bitset>
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#include <cstdlib>
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#include <cassert>
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#include <stdexcept>
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#include "test_macros.h"
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#if defined(TEST_COMPILER_C1XX)
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#pragma warning(disable: 6294) // Ill-defined for-loop: initial condition does not satisfy test. Loop body not executed.
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#endif
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template <std::size_t N>
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std::bitset<N>
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make_bitset()
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{
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std::bitset<N> v;
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for (std::size_t i = 0; i < N; ++i)
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v[i] = static_cast<bool>(std::rand() & 1);
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return v;
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}
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template <std::size_t N>
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void test_flip_one(bool test_throws)
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{
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std::bitset<N> v = make_bitset<N>();
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#ifdef TEST_HAS_NO_EXCEPTIONS
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if (test_throws) return;
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#else
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try
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{
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#endif
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v.flip(50);
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bool b = v[50];
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if (50 >= v.size())
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assert(false);
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assert(v[50] == b);
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v.flip(50);
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assert(v[50] != b);
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v.flip(50);
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assert(v[50] == b);
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assert(!test_throws);
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#ifndef TEST_HAS_NO_EXCEPTIONS
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}
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catch (std::out_of_range&)
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{
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assert(test_throws);
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}
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#endif
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}
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int main()
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{
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test_flip_one<0>(true);
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test_flip_one<1>(true);
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test_flip_one<31>(true);
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test_flip_one<32>(true);
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test_flip_one<33>(true);
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test_flip_one<63>(false);
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test_flip_one<64>(false);
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test_flip_one<65>(false);
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test_flip_one<1000>(false);
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}
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