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D4451: Fix copy/move issues casude by __tuple_leafs's converting constructor

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@213888 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier
2014-07-24 18:48:34 +00:00
parent 08b8506930
commit 9020c08989
6 changed files with 116 additions and 4 deletions
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20
test/utilities/tuple/tuple.tuple/tuple.cnstr/move.pass.cpp
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@@ -18,6 +18,18 @@
#include "../MoveOnly.h"
struct ConstructsWithTupleLeaf
{
ConstructsWithTupleLeaf() {}
ConstructsWithTupleLeaf(ConstructsWithTupleLeaf const &) { assert(false); }
ConstructsWithTupleLeaf(ConstructsWithTupleLeaf &&) {}
template <class T>
ConstructsWithTupleLeaf(T t)
{ assert(false); }
};
int main()
{
{
@@ -46,4 +58,12 @@ int main()
assert(std::get<1>(t) == 1);
assert(std::get<2>(t) == 2);
}
// A bug in tuple caused __tuple_leaf to use its explicit converting constructor
// as its move constructor. This tests that ConstructsWithTupleLeaf is not called
// (w/ __tuple_leaf)
{
typedef std::tuple<ConstructsWithTupleLeaf> d_t;
d_t d((ConstructsWithTupleLeaf()));
d_t d2(static_cast<d_t &&>(d));
}
}