diff options
Diffstat (limited to 'libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd')
3 files changed, 180 insertions, 0 deletions
diff --git a/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.not_integral1.fail.cpp b/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.not_integral1.fail.cpp new file mode 100644 index 00000000000..585e40bac8a --- /dev/null +++ b/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.not_integral1.fail.cpp @@ -0,0 +1,24 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// UNSUPPORTED: c++98, c++03, c++11, c++14 +// <numeric> + +// template<class _M, class _N> +// constexpr common_type_t<_M,_N> gcd(_M __m, _N __n) + +// Remarks: If either M or N is not an integer type, the program is ill-formed. + +#include <numeric> + + +int main() +{ + std::gcd(2.0, 4); +} diff --git a/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.not_integral2.fail.cpp b/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.not_integral2.fail.cpp new file mode 100644 index 00000000000..7a2709aa93b --- /dev/null +++ b/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.not_integral2.fail.cpp @@ -0,0 +1,24 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// UNSUPPORTED: c++98, c++03, c++11, c++14 +// <numeric> + +// template<class _M, class _N> +// constexpr common_type_t<_M,_N> gcd(_M __m, _N __n) + +// Remarks: If either M or N is not an integer type, the program is ill-formed. + +#include <numeric> + + +int main() +{ + std::gcd(4, 6.0); +} diff --git a/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.pass.cpp b/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.pass.cpp new file mode 100644 index 00000000000..84625cd6532 --- /dev/null +++ b/libcxx/test/std/numerics/numeric.ops/numeric.ops.gcd/gcd.pass.cpp @@ -0,0 +1,132 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// UNSUPPORTED: c++98, c++03, c++11, c++14 +// <numeric> + +// template<class _M, class _N> +// constexpr common_type_t<_M,_N> gcd(_M __m, _N __n) + +#include <numeric> +#include <cassert> +#include <cstdlib> // for rand() +#include <iostream> + +constexpr struct { + int x; + int y; + int expect; +} Cases[] = { + {0, 0, 0}, + {1, 0, 1}, + {0, 1, 1}, + {1, 1, 1}, + {2, 3, 1}, + {2, 4, 2}, + {36, 17, 1}, + {36, 18, 18} +}; + + +template <typename Input1, typename Input2, typename Output> +constexpr bool test0(Input1 in1, Input2 in2, Output out) +{ + static_assert((std::is_same<Output, decltype(std::gcd(in1, in2))>::value), "" ); + static_assert((std::is_same<Output, decltype(std::gcd(in2, in1))>::value), "" ); + return out == std::gcd(in1, in2) ? true : (std::abort(), false); +} + + +template <typename Input1, typename Input2 = Input1> +constexpr bool do_test(int dummy = 0) +{ + using S1 = typename std::make_signed<Input1>::type; + using S2 = typename std::make_signed<Input2>::type; + using U1 = typename std::make_unsigned<Input1>::type; + using U2 = typename std::make_unsigned<Input2>::type; + bool accumulate = true; + for (auto TC : Cases) { + { // Test with two signed types + using Output = std::common_type_t<S1, S2>; + accumulate &= test0<S1, S2, Output>(TC.x, TC.y, TC.expect); + accumulate &= test0<S1, S2, Output>(-TC.x, TC.y, TC.expect); + accumulate &= test0<S1, S2, Output>(TC.x, -TC.y, TC.expect); + accumulate &= test0<S1, S2, Output>(-TC.x, -TC.y, TC.expect); + accumulate &= test0<S2, S1, Output>(TC.x, TC.y, TC.expect); + accumulate &= test0<S2, S1, Output>(-TC.x, TC.y, TC.expect); + accumulate &= test0<S2, S1, Output>(TC.x, -TC.y, TC.expect); + accumulate &= test0<S2, S1, Output>(-TC.x, -TC.y, TC.expect); + } + { // test with two unsigned types + using Output = std::common_type_t<U1, U2>; + accumulate &= test0<U1, U2, Output>(TC.x, TC.y, TC.expect); + accumulate &= test0<U2, U1, Output>(TC.x, TC.y, TC.expect); + } + { // Test with mixed signs + using Output = std::common_type_t<S1, U2>; + accumulate &= test0<S1, U2, Output>(TC.x, TC.y, TC.expect); + accumulate &= test0<U2, S1, Output>(TC.x, TC.y, TC.expect); + accumulate &= test0<S1, U2, Output>(-TC.x, TC.y, TC.expect); + accumulate &= test0<U2, S1, Output>(TC.x, -TC.y, TC.expect); + } + { // Test with mixed signs + using Output = std::common_type_t<S2, U1>; + accumulate &= test0<S2, U1, Output>(TC.x, TC.y, TC.expect); + accumulate &= test0<U1, S2, Output>(TC.x, TC.y, TC.expect); + accumulate &= test0<S2, U1, Output>(-TC.x, TC.y, TC.expect); + accumulate &= test0<U1, S2, Output>(TC.x, -TC.y, TC.expect); + } + } + return accumulate; +} + +int main() +{ + auto non_cce = std::rand(); // a value that can't possibly be constexpr + + static_assert(do_test<signed char>(), ""); + static_assert(do_test<short>(), ""); + static_assert(do_test<int>(), ""); + static_assert(do_test<long>(), ""); + static_assert(do_test<long long>(), ""); + + assert(do_test<signed char>(non_cce)); + assert(do_test<short>(non_cce)); + assert(do_test<int>(non_cce)); + assert(do_test<long>(non_cce)); + assert(do_test<long long>(non_cce)); + + static_assert(do_test< int8_t>(), ""); + static_assert(do_test<int16_t>(), ""); + static_assert(do_test<int32_t>(), ""); + static_assert(do_test<int64_t>(), ""); + + assert(do_test< int8_t>(non_cce)); + assert(do_test<int16_t>(non_cce)); + assert(do_test<int32_t>(non_cce)); + assert(do_test<int64_t>(non_cce)); + + static_assert(do_test<signed char, int>(), ""); + static_assert(do_test<int, signed char>(), ""); + static_assert(do_test<short, int>(), ""); + static_assert(do_test<int, short>(), ""); + static_assert(do_test<int, long>(), ""); + static_assert(do_test<long, int>(), ""); + static_assert(do_test<int, long long>(), ""); + static_assert(do_test<long long, int>(), ""); + + assert((do_test<signed char, int>(non_cce))); + assert((do_test<int, signed char>(non_cce))); + assert((do_test<short, int>(non_cce))); + assert((do_test<int, short>(non_cce))); + assert((do_test<int, long>(non_cce))); + assert((do_test<long, int>(non_cce))); + assert((do_test<int, long long>(non_cce))); + assert((do_test<long long, int>(non_cce))); +} |
