1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // UNSUPPORTED: c++03, c++11, c++14 10 11 // <valarray> 12 13 // template<class T, size_t cnt> valarray(const T(&)[cnt], size_t) -> valarray<T>; 14 15 #include <valarray> 16 17 #include "test_macros.h" 18 19 int main(int, char**) 20 { 21 { 22 // From (initializer_list<T>) 23 std::valarray v = {1, 2, 3, 4, 5}; 24 ASSERT_SAME_TYPE(decltype(v), std::valarray<int>); 25 } 26 27 { 28 // From (const T(&)[N], size_t) 29 long a[] = {1, 2, 3, 4, 5}; 30 std::valarray v(a, 5); 31 ASSERT_SAME_TYPE(decltype(v), std::valarray<long>); 32 } 33 34 { 35 // From (const T&, size_t) 36 long a[] = {1, 2, 3, 4, 5}; 37 std::valarray v(&a[0], 5); 38 // Surprising but true. 39 ASSERT_SAME_TYPE(decltype(v), std::valarray<long*>); 40 } 41 42 { 43 // From (slice_array<T>) 44 std::valarray<long> v{1,2,3,4,5}; 45 std::valarray v2 = v[std::slice(2,3,1)]; 46 static_assert(std::is_same_v<decltype(v2), std::valarray<long>>); 47 } 48 49 { 50 // From (gslice_array<T>) 51 std::valarray<long> v{1,2,3,4,5}; 52 std::valarray v2 = v[std::gslice(0, {5}, {1})]; 53 static_assert(std::is_same_v<decltype(v2), std::valarray<long>>); 54 } 55 56 { 57 // From (mask_array<T>) 58 std::valarray<long> v = {1, 2, 3, 4, 5}; 59 std::valarray<bool> m = {true, false, true, false, true}; 60 std::valarray v2 = v[m]; 61 static_assert(std::is_same_v<decltype(v2), std::valarray<long>>); 62 } 63 64 { 65 // From (indirect_array<T>) 66 std::valarray<long> v = {1, 2, 3, 4, 5}; 67 std::valarray<size_t> i = {1, 2, 3}; 68 std::valarray v2 = v[i]; 69 static_assert(std::is_same_v<decltype(v2), std::valarray<long>>); 70 } 71 72 return 0; 73 } 74