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 // <valarray> 10 11 // template<class T> class valarray; 12 13 // valarray& operator=(const valarray& v); 14 15 #include <valarray> 16 #include <cassert> 17 #include <cstddef> 18 19 struct S 20 { 21 S() : x_(0) { default_ctor_called = true; } 22 S(int x) : x_(x) {} 23 int x_; 24 static bool default_ctor_called; 25 }; 26 27 bool S::default_ctor_called = false; 28 29 bool operator==(const S& lhs, const S& rhs) 30 { 31 return lhs.x_ == rhs.x_; 32 } 33 34 int main() 35 { 36 { 37 typedef int T; 38 T a[] = {1, 2, 3, 4, 5}; 39 const unsigned N = sizeof(a)/sizeof(a[0]); 40 std::valarray<T> v(a, N); 41 std::valarray<T> v2; 42 v2 = v; 43 assert(v2.size() == v.size()); 44 for (std::size_t i = 0; i < v2.size(); ++i) 45 assert(v2[i] == v[i]); 46 } 47 { 48 typedef double T; 49 T a[] = {1, 2.5, 3, 4.25, 5}; 50 const unsigned N = sizeof(a)/sizeof(a[0]); 51 std::valarray<T> v(a, N); 52 std::valarray<T> v2; 53 v2 = v; 54 assert(v2.size() == v.size()); 55 for (std::size_t i = 0; i < v2.size(); ++i) 56 assert(v2[i] == v[i]); 57 } 58 { 59 typedef std::valarray<double> T; 60 T a[] = {T(1), T(2), T(3), T(4), T(5)}; 61 const unsigned N = sizeof(a)/sizeof(a[0]); 62 std::valarray<T> v(a, N); 63 std::valarray<T> v2(a, N-2); 64 v2 = v; 65 assert(v2.size() == v.size()); 66 for (unsigned i = 0; i < N; ++i) 67 { 68 assert(v2[i].size() == v[i].size()); 69 for (std::size_t j = 0; j < v[i].size(); ++j) 70 assert(v2[i][j] == v[i][j]); 71 } 72 } 73 { 74 typedef S T; 75 T a[] = {T(1), T(2), T(3), T(4), T(5)}; 76 const unsigned N = sizeof(a)/sizeof(a[0]); 77 std::valarray<T> v(a, N); 78 std::valarray<T> v2; 79 v2 = v; 80 assert(v2.size() == v.size()); 81 for (std::size_t i = 0; i < v2.size(); ++i) 82 assert(v2[i] == v[i]); 83 assert(!S::default_ctor_called); 84 } 85 } 86