https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61504
Bug ID: 61504
Summary: Move elision after cast to rvalue reference
Product: gcc
Version: 4.10.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dyp-cpp at gmx dot net
Created attachment 32935
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32935&action=edit
Test case as in description.
Move elision is applied even though the object has been bound to a reference
(see [class.copy]/31). Test case:
---------------
#include <iostream>
struct loud
{
loud() { std::cout << "default\n"; }
loud(loud &&) { std::cout << "move\n"; }
~loud() { std::cout << "dtor\n"; }
};
int main()
{
loud l1{ static_cast<loud&&>(loud{}) };
}
------------------
Expected output (also, recent clang++):
default
move
dtor
dtor
Output produced by g++ -std=c++11 -Wall -Wextra -pedantic 4.10.0 20140611:
default
dtor
Possibly related:
http://www.open-std.org/JTC1/SC22/WG21/docs/cwg_defects.html#1376
