https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103403
Bug ID: 103403
Summary: Decltype of rvalue reference
Product: gcc
Version: 11.2.0
Status: UNCONFIRMED
Keywords: accepts-invalid
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: enricomaria.dean6elis at gmail dot com
CC: anders.granlund.0 at gmail dot com,
daniel.kruegler at googlemail dot com, jason at gcc dot
gnu.org,
mpolacek at gcc dot gnu.org, trippels at gcc dot gnu.org,
webrown.cpp at gmail dot com
Target Milestone: ---
Unlike the comment at the end of the original report claims, the bug seems to
be still present (or at least a different shade of it).
StackOverflow question:
https://stackoverflow.com/questions/70092776/validity-of-presenting-an-xvalue-as-an-lvalue
Repro: https://godbolt.org/z/h943G933a
+++ This bug was initially created as a clone of Bug #78209 +++
This came up on the isocpp mailing list yesterday:
markus@x4 /tmp % cat test.ii
int main() {
int &&i = 0;
decltype(auto) j = i;
return j;
}
markus@x4 /tmp % clang++ test.ii
test.ii:3:18: error: rvalue reference to type 'int' cannot bind to lvalue of
type 'int'
decltype(auto) j = i;
^ ~
1 error generated.
markus@x4 /tmp % icpc test.ii
test.ii(3): error: an rvalue reference cannot be bound to an lvalue
decltype(auto) j = i;
^
compilation aborted for test.ii (code 2)
markus@x4 /tmp % g++ -Wall -Wextra test.ii
markus@x4 /tmp %
