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From: "ai.azuma at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/52374] New: [C++11] Fails to transform id-expression into dependent base member access in lambda expression Date: Fri, 24 Feb 2012 16:50:00 -0000 [thread overview] Message-ID: <bug-52374-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52374 Bug #: 52374 Summary: [C++11] Fails to transform id-expression into dependent base member access in lambda expression Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: ai.azuma@gmail.com Created attachment 26742 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26742 Output of -v option and preprocessed file In the lambda expression's compound statement, id-expressions referring to non-static members should be transformed into class member access expressions by prefixing `(*this).'. However, GCC fails the transformation when id-expressions involved are qualified-ids and refer to dependent base members. A test case is as follows; //////////////////////////////////////////////////////////////////// struct B { int get() const { return 42; } }; template<typename X> struct D : public X { int get() const { return [this]() -> int { return X::get(); }(); } }; int main() { D<B> d; d.get(); } //////////////////////////////////////////////////////////////////// For the above mentioned well-formed code, 4.7.0 20120218 (experimental) with -std=c++11 complains as follows; main.cpp: In instantiation of 'D<X>::get() const [with X = B]::<lambda()>': main.cpp:10:29: required from 'struct D<X>::get() const [with X = B]::<lambda()>' main.cpp:10:65: required from 'int D<X>::get() const [with X = B]' main.cpp:16:9: required from here main.cpp:10:60: error: cannot call member function 'int B::get() const' without object `X::get' in the lambda expression should be implicitly transformed into `(*this).X::get', and the test case should compile successfully.
next reply other threads:[~2012-02-24 16:45 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-02-24 16:50 ai.azuma at gmail dot com [this message] 2012-02-24 17:20 ` [Bug c++/52374] " redi at gcc dot gnu.org 2013-03-13 2:53 ` jason at gcc dot gnu.org 2013-03-17 2:42 ` jason at gcc dot gnu.org 2013-03-23 19:24 ` jason at gcc dot gnu.org
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