74 lines
2.0 KiB
C++
74 lines
2.0 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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// UNSUPPORTED: c++03, c++11, c++14
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// <valarray>
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// template<class T, size_t cnt> valarray(const T(&)[cnt], size_t) -> valarray<T>;
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#include <valarray>
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#include "test_macros.h"
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int main(int, char**)
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{
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{
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// From (initializer_list<T>)
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std::valarray v = {1, 2, 3, 4, 5};
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ASSERT_SAME_TYPE(decltype(v), std::valarray<int>);
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}
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{
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// From (const T(&)[N], size_t)
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long a[] = {1, 2, 3, 4, 5};
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std::valarray v(a, 5);
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ASSERT_SAME_TYPE(decltype(v), std::valarray<long>);
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}
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{
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// From (const T&, size_t)
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long a[] = {1, 2, 3, 4, 5};
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std::valarray v(&a[0], 5);
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// Surprising but true.
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ASSERT_SAME_TYPE(decltype(v), std::valarray<long*>);
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}
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{
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// From (slice_array<T>)
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std::valarray<long> v{1,2,3,4,5};
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std::valarray v2 = v[std::slice(2,3,1)];
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static_assert(std::is_same_v<decltype(v2), std::valarray<long>>);
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}
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{
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// From (gslice_array<T>)
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std::valarray<long> v{1,2,3,4,5};
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std::valarray v2 = v[std::gslice(0, {5}, {1})];
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static_assert(std::is_same_v<decltype(v2), std::valarray<long>>);
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}
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{
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// From (mask_array<T>)
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std::valarray<long> v = {1, 2, 3, 4, 5};
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std::valarray<bool> m = {true, false, true, false, true};
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std::valarray v2 = v[m];
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static_assert(std::is_same_v<decltype(v2), std::valarray<long>>);
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}
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{
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// From (indirect_array<T>)
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std::valarray<long> v = {1, 2, 3, 4, 5};
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std::valarray<size_t> i = {1, 2, 3};
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std::valarray v2 = v[i];
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static_assert(std::is_same_v<decltype(v2), std::valarray<long>>);
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}
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return 0;
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}
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