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c255fa5e93
These tests for some guy's transparent operator functors were needlessly truncating their double results to int. Preserving the doubleness makes compilers happier. I'm following existing practice by adding an "// exact in binary" comment when the result isn't a whole number. (The changes from 6 to 6.0 and so forth are stylistic, not critical.) Fixes D27539. llvm-svn: 289106
41 lines
1.0 KiB
C++
41 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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// <functional>
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// negate
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#include <functional>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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int main()
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{
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typedef std::negate<int> F;
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const F f = F();
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static_assert((std::is_same<F::argument_type, int>::value), "" );
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static_assert((std::is_same<F::result_type, int>::value), "" );
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assert(f(36) == -36);
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#if TEST_STD_VER > 11
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typedef std::negate<> F2;
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const F2 f2 = F2();
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assert(f2(36) == -36);
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assert(f2(36L) == -36);
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assert(f2(36.0) == -36);
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constexpr int foo = std::negate<int> () (3);
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static_assert ( foo == -3, "" );
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constexpr double bar = std::negate<> () (3.0);
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static_assert ( bar == -3.0, "" );
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#endif
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}
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