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- //===----------------------------------------------------------------------===//
- //
- // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
- // See https://llvm.org/LICENSE.txt for license information.
- // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
- //
- //===----------------------------------------------------------------------===//
- // <valarray>
- // template<class T> class valarray;
- // valarray operator[](const valarray<bool>& vb) const;
- #include <valarray>
- #include <cassert>
- int main(int, char**)
- {
- {
- int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
- const std::size_t N1 = sizeof(a1)/sizeof(a1[0]);
- bool b[N1] = {true, false, false, true, true, false,
- false, true, false, false, false, true};
- std::valarray<int> v1(a1, N1);
- std::valarray<bool> vb(b, N1);
- std::valarray<int> v2(v1[vb]);
- assert(v2.size() == 5);
- assert(v2[ 0] == 0);
- assert(v2[ 1] == 3);
- assert(v2[ 2] == 4);
- assert(v2[ 3] == 7);
- assert(v2[ 4] == 11);
- }
- {
- int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
- const std::size_t N1 = sizeof(a1)/sizeof(a1[0]);
- bool b[N1] = {true, false, false, true, true, false,
- false, true, false, false, false, true};
- std::valarray<int> v1(a1, N1);
- std::valarray<bool> vb(b, N1);
- std::valarray<int> v2((v1 - 1)[vb]);
- assert(v2.size() == 5);
- assert(v2[ 0] == -1);
- assert(v2[ 1] == 2);
- assert(v2[ 2] == 3);
- assert(v2[ 3] == 6);
- assert(v2[ 4] == 10);
- }
- return 0;
- }
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