http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54055
Bug #: 54055
Summary: spurious(?) "invalid use of incomplete type" warning
in template definition
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: [email protected]
ReportedBy: [email protected]
Created attachment 27847
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27847
test case, C++ source
The attached input file is culled from Chromium sources. Past versions of
GCC do not complain about this and nor does Clang. Trunk G++ started
giving a warning fairly recently (sometime after I left for Prague).
It happens with no special options, and also with -std=gnu++98; I didn't
test other modes.
foo.cc:3:35: warning: invalid use of incomplete type ‘class scoped_ptr<C>’
[enabled by default]
private: struct RValue : public scoped_ptr { RValue(); ~RValue();
RValue(cons
^
foo.cc:2:7: warning: declaration of ‘class scoped_ptr<C>’ [enabled by default]
class scoped_ptr {
^
This code pattern comes from using the macro MOVE_ONLY_TYPE_FOR_CPP_03
as defined here:
http://src.chromium.org/viewvc/chrome/trunk/src/base/move.h?view=markup
Is this code really invalid C++? If so, was it intended to start rejecting
it without any new -std= or -Wfoo options when G++ never did before?
