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* [Bug c++/102036] New: -Wmismatched-tags doesn't warn for explicit instantations @ 2021-08-24 11:30 redi at gcc dot gnu.org 2021-08-24 13:43 ` [Bug c++/102036] " cvs-commit at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: redi at gcc dot gnu.org @ 2021-08-24 11:30 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102036 Bug ID: 102036 Summary: -Wmismatched-tags doesn't warn for explicit instantations Product: gcc Version: 12.0 Status: UNCONFIRMED Keywords: diagnostic Severity: enhancement Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: redi at gcc dot gnu.org CC: msebor at gcc dot gnu.org Target Milestone: --- Clang gives a -Wmismatched-tags warning about this, but GCC doesn't: template<typename T> struct X { }; template class X<int>; ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/102036] -Wmismatched-tags doesn't warn for explicit instantations 2021-08-24 11:30 [Bug c++/102036] New: -Wmismatched-tags doesn't warn for explicit instantations redi at gcc dot gnu.org @ 2021-08-24 13:43 ` cvs-commit at gcc dot gnu.org 2021-08-24 14:40 ` msebor at gcc dot gnu.org 2021-12-14 22:16 ` msebor at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2021-08-24 13:43 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102036 --- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>: https://gcc.gnu.org/g:d8b7282ea27e02f687272cb8ea5f66ca900f1582 commit r12-3118-gd8b7282ea27e02f687272cb8ea5f66ca900f1582 Author: Jonathan Wakely <jwakely@redhat.com> Date: Tue Aug 24 12:31:06 2021 +0100 libstdc++: Fix mismatched class-key tags Clang warns about this, but GCC doesn't (see PR c++/102036). Signed-off-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: * src/c++11/cxx11-shim_facets.cc: Fix mismatched class-key in explicit instantiation definitions. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/102036] -Wmismatched-tags doesn't warn for explicit instantations 2021-08-24 11:30 [Bug c++/102036] New: -Wmismatched-tags doesn't warn for explicit instantations redi at gcc dot gnu.org 2021-08-24 13:43 ` [Bug c++/102036] " cvs-commit at gcc dot gnu.org @ 2021-08-24 14:40 ` msebor at gcc dot gnu.org 2021-12-14 22:16 ` msebor at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: msebor at gcc dot gnu.org @ 2021-08-24 14:40 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102036 Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2021-08-24 Severity|enhancement |normal Ever confirmed|0 |1 --- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> --- Confirmed. The warning should trigger in this case so it's a bug rather than an enhancement. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/102036] -Wmismatched-tags doesn't warn for explicit instantations 2021-08-24 11:30 [Bug c++/102036] New: -Wmismatched-tags doesn't warn for explicit instantations redi at gcc dot gnu.org 2021-08-24 13:43 ` [Bug c++/102036] " cvs-commit at gcc dot gnu.org 2021-08-24 14:40 ` msebor at gcc dot gnu.org @ 2021-12-14 22:16 ` msebor at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: msebor at gcc dot gnu.org @ 2021-12-14 22:16 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102036 Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=103703 --- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> --- G++ also doesn't warn for more involved cases like the one in pr103703 (with the ICE fixed): template <typename T> struct A { struct B { }; }; template <typename T> struct C { friend class A<C>::B; // { dg-warning "-Wmismatched-tags" "pr102036" { xfail *-*-* } } }; template struct C<int>; Clang warns for the above but also suffers from a false positive below: template <typename T> struct D { friend class A<D>::B; // okay, specialized as class below }; template <> struct A<long> { class B { }; }; template struct D<long>; ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-12-14 22:16 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-08-24 11:30 [Bug c++/102036] New: -Wmismatched-tags doesn't warn for explicit instantations redi at gcc dot gnu.org 2021-08-24 13:43 ` [Bug c++/102036] " cvs-commit at gcc dot gnu.org 2021-08-24 14:40 ` msebor at gcc dot gnu.org 2021-12-14 22:16 ` msebor at gcc dot gnu.org
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