[Bug c++/49372] New: Temporaries evaluated for arguments of a default constructors of array elements not destructed properly (?)
schaub.johannes at googlemail dot com
gcc-bugzilla@gcc.gnu.org
Sat Jun 11 13:27:00 GMT 2011
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49372
Summary: Temporaries evaluated for arguments of a default
constructors of array elements not destructed properly
(?)
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: schaub.johannes@googlemail.com
This testcase outputs a surprising result:
struct A {
A() { std::cout << "C" << std::endl; }
~A() { std::cout << "D" << std::endl; }
};
struct B {
B(A const& a = A()) { }
};
typedef B array[2];
int main() {
array{};
}
GCC prints "CCDD". I would have expected "CDCD", as it seems that is the intent
of the wording in the spec (FDIS). The FDIS however seems to be contradicting
here, but it appears to me that GCC should better print "CDCD", so as to follow
the intent.
Originated from
http://stackoverflow.com/questions/6315670/when-an-array-is-created-by-a-subexpression-what-happens-with-the-temporaries-th
.
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