struct Foo {
Foo(Foo && from) { }
Foo() { }
~Foo() { }
/*private:
Foo(const Foo & from) { }*/
};
Foo CreateFoo(bool b) {
Foo f;
if (b) return Foo();
return f;
}
int main () {
Foo f(CreateFoo(false));
}
The problem might also be a spurious destructor call. The symptom is that the
constructor without parameters is called once, the move constructor never and
the destructor twice. With the traditional copy constructor included, the
programme works as intended, with one additional move constructor call, but no
copy constructor calls. Without the "if (b) return Foo();" line the programme
also works.
I've tested with these builds and -std=gnu++0x:
g++-4.3 (Debian 4.3.2-1.1) 4.3.2
g++ (Debian 20090129-1) 4.4.0 20090129 (experimental) [trunk revision 143770]
--
Summary: Missing "move" constructor call (C++0x rvalue
references)
Product: gcc
Version: 4.3.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: gbrammer at gmx dot de
GCC build triplet: x86_64-linux-gnu
GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39126
