3d26ee2921
MSVC has compiler warnings C4127 "conditional expression is constant" (enabled by /W4) and C6326 "Potential comparison of a constant with another constant" (enabled by /analyze). They're potentially useful, although they're slightly annoying to library devs who know what they're doing. In the latest version of the compiler, C4127 is suppressed when the compiler sees simple tests like "if (name_of_thing)", so extracting comparison expressions into named constants is a workaround. At the same time, using std::integral_constant avoids C6326, which doesn't look at template arguments. test/std/containers/sequences/vector.bool/emplace.pass.cpp Replace 1 == 1 with true, which is the same as far as the library is concerned. Fixes D28837. llvm-svn: 292432
47 lines
1.0 KiB
C++
47 lines
1.0 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 bool any() const;
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#include <bitset>
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#include <type_traits>
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#include <cassert>
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template <std::size_t N>
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void test_any()
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{
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std::bitset<N> v;
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v.reset();
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assert(v.any() == false);
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v.set();
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assert(v.any() == (N != 0));
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const bool greater_than_1 = std::integral_constant<bool, (N > 1)>::value; // avoid compiler warnings
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if (greater_than_1)
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{
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v[N/2] = false;
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assert(v.any() == true);
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v.reset();
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v[N/2] = true;
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assert(v.any() == true);
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}
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}
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int main()
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{
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test_any<0>();
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test_any<1>();
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test_any<31>();
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test_any<32>();
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test_any<33>();
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test_any<63>();
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test_any<64>();
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test_any<65>();
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test_any<1000>();
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}
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