59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// test size_t count() const;
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#include <bitset>
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#include <cstdlib>
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#include <cassert>
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#include "test_macros.h"
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#if defined(TEST_COMPILER_CLANG)
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#pragma clang diagnostic ignored "-Wtautological-compare"
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#elif 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_count()
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{
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const std::bitset<N> v = make_bitset<N>();
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std::size_t c1 = v.count();
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std::size_t c2 = 0;
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for (std::size_t i = 0; i < N; ++i)
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if (v[i])
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++c2;
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assert(c1 == c2);
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}
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int main(int, char**)
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{
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test_count<0>();
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test_count<1>();
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test_count<31>();
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test_count<32>();
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test_count<33>();
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test_count<63>();
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test_count<64>();
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test_count<65>();
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test_count<1000>();
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return 0;
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}
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