https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108594
Bug ID: 108594
Summary: GCC ignores deleted movement constructor is not used
on return
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dev at gutoehrlein dot eu
Target Milestone: ---
Hello,
im not 100% certain, but the following code should probably not compile, but
instead produce an error. In gcc (Version 12.2, also in trunk) the code
compiles. Both the MSVC compiler and clang (Version 15.0.0) produce an error:
* MSVC: error C2280: 'ClassA::ClassA(ClassA &&)': attempting to reference a
deleted function
* CLANG: error: call to delete constructor of 'Class A'
Since the movement constructor in class a is defined but deleted, shouldn't it
be selected by the return in the function fA to avoid copying? If so, the
return should produce an error, because the constructor is deleted.
Sincerly
Robin
Example in godbold.org: https://godbolt.org/z/1fnr6zKx4
--------------------
class ClassA
{
public:
ClassA() {}
ClassA(const ClassA& v) {}
ClassA(ClassA&& v) = delete;
};
ClassA fA() { return ClassA(); } // Here the movement constructor should be
selected
int main()
{
ClassA a { fA() };
return 0;
}
