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171ed2198d
Summary:
Currently libc++ implements some operations on valarray by using the
resize method. This method has a parameter with a default value.
Because of this, valarray may spuriously construct and destruct
objects of valarray's element type.
This patch fixes this issue and adds corresponding test cases.
Reviewers: EricWF, mclow.lists
Reviewed By: mclow.lists
Subscribers: rogfer01, cfe-commits
Differential Revision: https://reviews.llvm.org/D41992
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@324596 91177308-0d34-0410-b5e6-96231b3b80d8
50 lines
1007 B
C++
50 lines
1007 B
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. 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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// valarray();
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#include <valarray>
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#include <cassert>
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struct S {
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S() { ctor_called = true; }
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static bool ctor_called;
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};
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bool S::ctor_called = false;
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int main()
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{
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{
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std::valarray<int> v;
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assert(v.size() == 0);
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}
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{
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std::valarray<float> v;
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assert(v.size() == 0);
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}
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{
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std::valarray<double> v;
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assert(v.size() == 0);
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}
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{
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std::valarray<std::valarray<double> > v;
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assert(v.size() == 0);
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}
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{
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std::valarray<S> v;
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assert(v.size() == 0);
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assert(!S::ctor_called);
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}
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}
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