https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80332
Bug ID: 80332
Summary: Warning is issued for deprecated "using" type alias of
deprecated type
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: freddie_chopin at op dot pl
Target Milestone: ---
There is a base type with "__attribute__ ((deprecated))". If I create an alias
with "typedef", which also has "__attribute__ ((deprecated))", no warning is
issued, which matches the official docs:
https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#Common-Type-Attributes
However if I create a C++11 type alias with "using" keyword, which also has
"__attribute__ ((deprecated))", then the warning is issued for the line with
type alias.
I would expect that it would work the same way as deprecated "typedef", so no
warning.
Code:
-- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 --
typedef int Integer __attribute__ ((deprecated));
using Using __attribute__ ((deprecated)) = Integer;
typedef Integer Typedef __attribute__ ((deprecated));
-- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 --
Test:
-- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 --
$ g++ -c depr.cpp
depr.cpp:2:44: warning: ‘Integer’ is deprecated [-Wdeprecated-declarations]
using Using __attribute__ ((deprecated)) = Integer;
^~~~~~~
depr.cpp:1:13: note: declared here
typedef int Integer __attribute__ ((deprecated));
^~~~~~~
-- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 --
