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 apply(value_type f(const value_type&)) const; 14 15 #include <valarray> 16 #include <cassert> 17 18 typedef int T; 19 20 T f(const T& t) {return t + 5;} 21 22 int main() 23 { 24 { 25 T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; 26 T a2[] = {6, 7, 8, 9, 10, 11, 12, 13, 14, 15}; 27 const unsigned N1 = sizeof(a1)/sizeof(a1[0]); 28 std::valarray<T> v1(a1, N1); 29 std::valarray<T> v2 = v1.apply(f); 30 assert(v2.size() == N1); 31 for (unsigned i = 0; i < N1; ++i) 32 assert(v2[i] == a2[i]); 33 } 34 { 35 const unsigned N1 = 0; 36 std::valarray<T> v1; 37 std::valarray<T> v2 = v1.apply(f); 38 assert(v2.size() == N1); 39 } 40 { 41 T a1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; 42 T a2[] = {7, 9, 11, 13, 15, 17, 19, 21, 23, 25}; 43 const unsigned N1 = sizeof(a1)/sizeof(a1[0]); 44 std::valarray<T> v1(a1, N1); 45 std::valarray<T> v2 = (v1+v1).apply(f); 46 assert(v2.size() == N1); 47 for (unsigned i = 0; i < N1; ++i) 48 assert(v2[i] == a2[i]); 49 } 50 } 51