https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70647
Bug ID: 70647
Summary: Feature request: warning for self-moving in
constructors
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: matt at godbolt dot org
Target Milestone: ---
Consider the following code:
#include <utility> // for std::move
struct A {
int a; int b;
A(A &&o)
: a(a), // I get a warning here...
b(o.b) {}
};
struct B {
int a; int b;
B(B &&o)
: a(std::move(a)), // but sadly not here
b(std::move(o.b)) {}
};
[ c.f https://godbolt.org/g/v7zPYL ]
In the non-moving case, I get a warning that I've typoed and assigned a with
itself.
In the move case, there's no such warning. I appreciate this is probably
difficult (if not impossible) to detect, but if there's any way it can be done,
it would save a painful debugging session or two!
