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* [Bug c++/64063] New: Incorrect "ambiguous template specialization" error @ 2014-11-24 23:35 redi at gcc dot gnu.org 2014-11-25 0:02 ` [Bug c++/64063] " redi at gcc dot gnu.org ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: redi at gcc dot gnu.org @ 2014-11-24 23:35 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64063 Bug ID: 64063 Summary: Incorrect "ambiguous template specialization" error Product: gcc Version: 5.0 Status: UNCONFIRMED Keywords: rejects-valid Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: redi at gcc dot gnu.org G++ rejects this explicit instantiation definition as ambiguous: template<typename T> struct S { void foo(int) { } template<typename U> void foo(U) { } }; template void S<char>::foo(int); // XXX EDG thinks it's OK, clang crashes, and G++ says: inst.cc:8:15: error: ambiguous template specialization ‘foo<>’ for ‘void S<char>::foo(int)’ template void S<char>::foo(int); // XXX ^ inst.cc:4:8: note: candidates are: void S<T>::foo(int) [with T = char] void foo(int) { } ^ inst.cc:5:29: note: template<class U> void S<T>::foo(U) [with U = U; T = char] template<typename U> void foo(U) { } ^ I think EDG is correct and the diagnostic is wrong, because I'm not referring to any foo<> but rather foo. Changing the instantiation to be unambiguously a template produces almost the same error (with foo<> replaced by foo<int>) and that definitely isn't ambiguous because one candidate isn't even a function template: template<typename T> struct S { void foo(int) { } template<typename U> void foo(U) { } }; template void S<char>::foo<int>(int); // XXX inst.cc:8:15: error: ambiguous template specialization ‘foo<int>’ for ‘void S<char>::foo(int)’ template void S<char>::foo<int>(int); // XXX ^ inst.cc:4:8: note: candidates are: void S<T>::foo(int) [with T = char] void foo(int) { } ^ inst.cc:5:29: note: template<class U> void S<T>::foo(U) [with U = U; T = char] template<typename U> void foo(U) { } ^ >From gcc-bugs-return-468449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 24 23:38:12 2014 Return-Path: <gcc-bugs-return-468449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org> Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 11594 invoked by alias); 24 Nov 2014 23:38:12 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: <gcc-bugs.gcc.gnu.org> List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/> List-Post: <mailto:gcc-bugs@gcc.gnu.org> List-Help: <mailto:gcc-bugs-help@gcc.gnu.org> Sender: gcc-bugs-owner@gcc.gnu.org Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 11566 invoked by uid 48); 24 Nov 2014 23:38:09 -0000 From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug ada/64057] Overlapping memcpy generated for array assignment Date: Mon, 24 Nov 2014 23:38:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: ada X-Bugzilla-Version: 4.9.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: ebotcazou at gcc dot gnu.org X-Bugzilla-Status: WAITING X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status cf_reconfirmed_on cc everconfirmed Message-ID: <bug-64057-4-KS74Lj1BGn@http.gcc.gnu.org/bugzilla/> In-Reply-To: <bug-64057-4@http.gcc.gnu.org/bugzilla/> References: <bug-64057-4@http.gcc.gnu.org/bugzilla/> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-11/txt/msg02921.txt.bz2 Content-length: 691 https://gcc.gnu.org/bugzilla/show_bug.cgi?idd057 Eric Botcazou <ebotcazou at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |WAITING Last reconfirmed| |2014-11-24 CC| |ebotcazou at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > Let me know if you need more info We need a testcase that fails with GCC 4.8 or GCC 4.9 since xsinfo is built by the base compiler. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/64063] Incorrect "ambiguous template specialization" error 2014-11-24 23:35 [Bug c++/64063] New: Incorrect "ambiguous template specialization" error redi at gcc dot gnu.org @ 2014-11-25 0:02 ` redi at gcc dot gnu.org 2014-11-25 2:38 ` [Bug c++/64063] [DR 1665] " redi at gcc dot gnu.org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: redi at gcc dot gnu.org @ 2014-11-25 0:02 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64063 --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- Apparently EDG instantiates the member function template, which is not what I wanted: template<typename T> struct S { void foo(int) { } template<typename U> void foo(U); // undefined }; template void S<char>::foo(int); // XXX "inst.cc", line 8: error: function "S<T>::foo(U) [with T=char, U=int]" cannot be instantiated -- no template definition was supplied template void S<char>::foo(int); // XXX ^ Is there no syntax for instantiating the non-template? ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/64063] [DR 1665] Incorrect "ambiguous template specialization" error 2014-11-24 23:35 [Bug c++/64063] New: Incorrect "ambiguous template specialization" error redi at gcc dot gnu.org 2014-11-25 0:02 ` [Bug c++/64063] " redi at gcc dot gnu.org @ 2014-11-25 2:38 ` redi at gcc dot gnu.org 2014-11-25 2:43 ` redi at gcc dot gnu.org ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: redi at gcc dot gnu.org @ 2014-11-25 2:38 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64063 Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |SUSPENDED Last reconfirmed| |2014-11-25 Summary|Incorrect "ambiguous |[DR 1665] Incorrect |template specialization" |"ambiguous template |error |specialization" error Ever confirmed|0 |1 --- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- At http://llvm.org/bugs/show_bug.cgi?id=21661 Richard identified this as http://open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#1665 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/64063] [DR 1665] Incorrect "ambiguous template specialization" error 2014-11-24 23:35 [Bug c++/64063] New: Incorrect "ambiguous template specialization" error redi at gcc dot gnu.org 2014-11-25 0:02 ` [Bug c++/64063] " redi at gcc dot gnu.org 2014-11-25 2:38 ` [Bug c++/64063] [DR 1665] " redi at gcc dot gnu.org @ 2014-11-25 2:43 ` redi at gcc dot gnu.org 2022-01-24 18:19 ` pinskia at gcc dot gnu.org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: redi at gcc dot gnu.org @ 2014-11-25 2:43 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64063 --- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- The current handling of the following is still wrong (rejects-valid) independent of DR 1665. It should compile because it can only refer to the template: template<typename T> struct S { void foo(int); template<typename U> void foo(U) { } }; template void S<char>::foo<>(int); ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/64063] [DR 1665] Incorrect "ambiguous template specialization" error 2014-11-24 23:35 [Bug c++/64063] New: Incorrect "ambiguous template specialization" error redi at gcc dot gnu.org ` (2 preceding siblings ...) 2014-11-25 2:43 ` redi at gcc dot gnu.org @ 2022-01-24 18:19 ` pinskia at gcc dot gnu.org 2022-01-24 19:13 ` pinskia at gcc dot gnu.org 2022-01-24 19:14 ` pinskia at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-01-24 18:19 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64063 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|SUSPENDED |RESOLVED Resolution|--- |DUPLICATE --- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Dup of bug 39270. *** This bug has been marked as a duplicate of bug 39270 *** ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/64063] [DR 1665] Incorrect "ambiguous template specialization" error 2014-11-24 23:35 [Bug c++/64063] New: Incorrect "ambiguous template specialization" error redi at gcc dot gnu.org ` (3 preceding siblings ...) 2022-01-24 18:19 ` pinskia at gcc dot gnu.org @ 2022-01-24 19:13 ` pinskia at gcc dot gnu.org 2022-01-24 19:14 ` pinskia at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-01-24 19:13 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64063 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|DUPLICATE |--- Status|RESOLVED |NEW --- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Reopening. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/64063] [DR 1665] Incorrect "ambiguous template specialization" error 2014-11-24 23:35 [Bug c++/64063] New: Incorrect "ambiguous template specialization" error redi at gcc dot gnu.org ` (4 preceding siblings ...) 2022-01-24 19:13 ` pinskia at gcc dot gnu.org @ 2022-01-24 19:14 ` pinskia at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-01-24 19:14 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64063 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |fchelnokov at gmail dot com --- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> --- *** Bug 104204 has been marked as a duplicate of this bug. *** ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-01-24 19:14 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2014-11-24 23:35 [Bug c++/64063] New: Incorrect "ambiguous template specialization" error redi at gcc dot gnu.org 2014-11-25 0:02 ` [Bug c++/64063] " redi at gcc dot gnu.org 2014-11-25 2:38 ` [Bug c++/64063] [DR 1665] " redi at gcc dot gnu.org 2014-11-25 2:43 ` redi at gcc dot gnu.org 2022-01-24 18:19 ` pinskia at gcc dot gnu.org 2022-01-24 19:13 ` pinskia at gcc dot gnu.org 2022-01-24 19:14 ` pinskia at gcc dot gnu.org
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