https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93824
Bug ID: 93824
Summary: -Wredundant-tags false positives
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: sbergman at redhat dot com
CC: msebor at gcc dot gnu.org
Target Milestone: ---
With recent GCC trunk and
> $ cat incA.h
> struct S {};
> $ cat incB.h
> void f(struct S *);
> $ cat test1.cc
> #include "incA.h"
> #include "incB.h"
> $ cat test2.cc
> #include "incB.h"
> $ g++ -Wredundant-tags -fsyntax-only test1.cc
> In file included from test1.cc:2:
> incB.h:1:8: warning: redundant class-key ‘struct’ in reference to ‘struct S’
> [-Wredundant-tags]
> 1 | void f(struct S *);
> | ^~~~~~
> | ------
> $ g++ -Wredundant-tags -fsyntax-only test2.cc
> In file included from test2.cc:1:
> incB.h:1:8: warning: redundant class-key ‘struct’ in reference to ‘struct S’
> [-Wredundant-tags]
> 1 | void f(struct S *);
> | ^~~~~~
> | ------
there should IMO not be warnings when compiling neither test1.ccc nor test2.cc.
test2.cc clearly is a false positive, and arguably test1.cc is as well, albeit
a little more subtly.
