1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <valarray> 11 12 // template<class T> class valarray; 13 14 // valarray& operator=(const valarray& v); 15 16 #include <valarray> 17 #include <cassert> 18 #include <cstddef> 19 20 struct S 21 { 22 S() : x_(0) { default_ctor_called = true; } 23 S(int x) : x_(x) {} 24 int x_; 25 static bool default_ctor_called; 26 }; 27 28 bool S::default_ctor_called = false; 29 30 bool operator==(const S& lhs, const S& rhs) 31 { 32 return lhs.x_ == rhs.x_; 33 } 34 35 int main() 36 { 37 { 38 typedef int T; 39 T a[] = {1, 2, 3, 4, 5}; 40 const unsigned N = sizeof(a)/sizeof(a[0]); 41 std::valarray<T> v(a, N); 42 std::valarray<T> v2; 43 v2 = v; 44 assert(v2.size() == v.size()); 45 for (std::size_t i = 0; i < v2.size(); ++i) 46 assert(v2[i] == v[i]); 47 } 48 { 49 typedef double T; 50 T a[] = {1, 2.5, 3, 4.25, 5}; 51 const unsigned N = sizeof(a)/sizeof(a[0]); 52 std::valarray<T> v(a, N); 53 std::valarray<T> v2; 54 v2 = v; 55 assert(v2.size() == v.size()); 56 for (std::size_t i = 0; i < v2.size(); ++i) 57 assert(v2[i] == v[i]); 58 } 59 { 60 typedef std::valarray<double> T; 61 T a[] = {T(1), T(2), T(3), T(4), T(5)}; 62 const unsigned N = sizeof(a)/sizeof(a[0]); 63 std::valarray<T> v(a, N); 64 std::valarray<T> v2(a, N-2); 65 v2 = v; 66 assert(v2.size() == v.size()); 67 for (unsigned i = 0; i < N; ++i) 68 { 69 assert(v2[i].size() == v[i].size()); 70 for (std::size_t j = 0; j < v[i].size(); ++j) 71 assert(v2[i][j] == v[i][j]); 72 } 73 } 74 { 75 typedef S T; 76 T a[] = {T(1), T(2), T(3), T(4), T(5)}; 77 const unsigned N = sizeof(a)/sizeof(a[0]); 78 std::valarray<T> v(a, N); 79 std::valarray<T> v2; 80 v2 = v; 81 assert(v2.size() == v.size()); 82 for (std::size_t i = 0; i < v2.size(); ++i) 83 assert(v2[i] == v[i]); 84 assert(!S::default_ctor_called); 85 } 86 } 87
