f5256e16df
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103516 91177308-0d34-0410-b5e6-96231b3b80d8
36 lines
1.0 KiB
C++
36 lines
1.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <valarray>
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// template<class T> class valarray;
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// mask_array<value_type> operator[](const valarray<bool>& vb);
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#include <valarray>
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#include <cassert>
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int main()
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{
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int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
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const std::size_t N1 = sizeof(a1)/sizeof(a1[0]);
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bool b[N1] = {true, false, false, true, true, false,
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false, true, false, false, false, true};
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std::valarray<int> v1(a1, N1);
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std::valarray<bool> vb(b, N1);
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std::valarray<int> v2(5);
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v2 = v1[vb];
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assert(v2.size() == 5);
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assert(v2[ 0] == 0);
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assert(v2[ 1] == 3);
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assert(v2[ 2] == 4);
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assert(v2[ 3] == 7);
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assert(v2[ 4] == 11);
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}
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