https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93106
Bug ID: 93106
Summary: [c++2a] Deleted move constructor is not selected when
returning an automatic variable
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ph3rin at gmail dot com
Target Milestone: ---
According to the c++ standard (draft n4835) the following code should not
compile because it references a deleted function:
struct not_movable {
not_movable() = default;
not_movable(not_movable const&) = default;
not_movable(not_movable&&) = delete;
};
not_movable foo() {
not_movable obj;
return obj;
}
When returning obj, the overload resolution should successfully select the
deleted move constructor, therefore resulting in a compiler error.
The code has been tested under gcc 9.2 with compiler flags -std=c++2a.
Quotes from the standard: http://eel.is/c++draft/class.copy.elision#3
