https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67678
Bug ID: 67678
Summary: Nested class can be re-declared after definition
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Keywords: accepts-invalid
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
This should give a diagnostic:
struct A { struct B{}; struct B; };
9.2 [class.mem] p1:
A member shall not be declared twice in the member-specification,
except that a nested class or member class template can be declared
and then later defined, [...]
Clang warns:
x.cc:1:31: warning: class member cannot be redeclared
[-Wredeclared-class-member]
struct A { struct B{}; struct B; };
^
x.cc:1:19: note: previous declaration is here
struct A { struct B{}; struct B; };
^
1 warning generated.
EDG warns:
"x.cc", line 1: warning: invalid redeclaration of nested class
struct A { struct B{}; struct B; };
^
