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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
42 lines
1.2 KiB
C++
42 lines
1.2 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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// divides
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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::divides<int> F;
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const F f = F();
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static_assert((std::is_same<int, F::first_argument_type>::value), "" );
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static_assert((std::is_same<int, F::second_argument_type>::value), "" );
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static_assert((std::is_same<int, F::result_type>::value), "" );
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assert(f(36, 4) == 9);
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#if TEST_STD_VER > 11
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typedef std::divides<> F2;
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const F2 f2 = F2();
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assert(f2(36, 4) == 9);
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assert(f2(36.0, 4) == 9);
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assert(f2(18, 4.0) == 4.5); // exact in binary
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constexpr int foo = std::divides<int> () (3, 2);
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static_assert ( foo == 1, "" );
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constexpr double bar = std::divides<> () (3.0, 2);
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static_assert ( bar == 1.5, "" ); // exact in binary
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#endif
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}
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