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* [Bug c++/16965] New: [3.4/3.5 regression] Confusing mismatch in error messages
@ 2004-08-10 14:31 bangerth at dealii dot org
2004-08-10 14:31 ` [Bug c++/16965] " bangerth at dealii dot org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: bangerth at dealii dot org @ 2004-08-10 14:31 UTC (permalink / raw)
To: gcc-bugs
Consider this little example, derived from PR 16963:
-------------
template <typename T> struct B {
static int Bar(T);
};
struct D : B<int>, B<char> {};
int i1 = D().Bar(1);
int i2 = D::Bar(2);
-------------
Note that Bar() is static, so trying to call it via D().Bar or D::Bar
shouldn't make a difference (for a moment ignore the fact that the
code doesn't compile at all, probably for a good reason, as discussed
in PR 16963). However, we get this confusing mismatch in error messages:
g/x> /home/bangerth/bin/gcc-3.5-pre/bin/c++ -c x.cc
x.cc:6: error: request for member `Bar' is ambiguous
x.cc:2: error: candidates are: static int B<T>::Bar(T) [with T = char]
x.cc:2: error: static int B<T>::Bar(T) [with T = int]
x.cc:7: error: `Bar' is not a member of `D'
The error message in line 7 is clearly not helpful, and wrong above
that. It should simply read the same as the ambiguity message in line 6.
This is a regression in 3.4 and mainline over previous versions that
simply printed as expected:
g/x> /home/bangerth/bin/gcc-3.3*/bin/c++ -c x.cc
x.cc:6: error: request for member `Bar' is ambiguous
x.cc:2: error: candidates are: static int B<T>::Bar(T) [with T = char]
x.cc:2: error: static int B<T>::Bar(T) [with T = int]
x.cc:7: error: request for member `Bar' is ambiguous
x.cc:2: error: candidates are: static int B<T>::Bar(T) [with T = char]
x.cc:2: error: static int B<T>::Bar(T) [with T = int]
W.
--
Summary: [3.4/3.5 regression] Confusing mismatch in error
messages
Product: gcc
Version: 3.4.1
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: bangerth at dealii dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16965
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/16965] [3.4/3.5 regression] Confusing mismatch in error messages
2004-08-10 14:31 [Bug c++/16965] New: [3.4/3.5 regression] Confusing mismatch in error messages bangerth at dealii dot org
@ 2004-08-10 14:31 ` bangerth at dealii dot org
2004-08-15 5:51 ` pinskia at gcc dot gnu dot org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bangerth at dealii dot org @ 2004-08-10 14:31 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |3.4.1 3.5.0
Known to work| |2.95 3.2 3.3
Target Milestone|--- |3.4.2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16965
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/16965] [3.4/3.5 regression] Confusing mismatch in error messages
2004-08-10 14:31 [Bug c++/16965] New: [3.4/3.5 regression] Confusing mismatch in error messages bangerth at dealii dot org
2004-08-10 14:31 ` [Bug c++/16965] " bangerth at dealii dot org
@ 2004-08-15 5:51 ` pinskia at gcc dot gnu dot org
2004-08-17 7:24 ` mmitchel at gcc dot gnu dot org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-08-15 5:51 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-08-15 05:51 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-08-15 05:51:30
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16965
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/16965] [3.4/3.5 regression] Confusing mismatch in error messages
2004-08-10 14:31 [Bug c++/16965] New: [3.4/3.5 regression] Confusing mismatch in error messages bangerth at dealii dot org
2004-08-10 14:31 ` [Bug c++/16965] " bangerth at dealii dot org
2004-08-15 5:51 ` pinskia at gcc dot gnu dot org
@ 2004-08-17 7:24 ` mmitchel at gcc dot gnu dot org
2004-08-17 17:32 ` cvs-commit at gcc dot gnu dot org
2004-08-17 17:37 ` mmitchel at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2004-08-17 7:24 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mmitchel at gcc dot gnu dot org 2004-08-17 07:24 -------
This is not worth fixing for GCC 3.4.x. Retargeted at GCC 3.5. I am working on
a fix.
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |mark at codesourcery dot com
|dot org |
Status|NEW |ASSIGNED
Target Milestone|3.4.2 |3.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16965
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/16965] [3.4/3.5 regression] Confusing mismatch in error messages
2004-08-10 14:31 [Bug c++/16965] New: [3.4/3.5 regression] Confusing mismatch in error messages bangerth at dealii dot org
` (2 preceding siblings ...)
2004-08-17 7:24 ` mmitchel at gcc dot gnu dot org
@ 2004-08-17 17:32 ` cvs-commit at gcc dot gnu dot org
2004-08-17 17:37 ` mmitchel at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-08-17 17:32 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-08-17 17:32 -------
Subject: Bug 16965
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: mmitchel@gcc.gnu.org 2004-08-17 17:32:37
Modified files:
gcc/cp : ChangeLog cp-tree.h name-lookup.c parser.c pt.c
semantics.c
gcc/testsuite : ChangeLog
Added files:
gcc/testsuite/g++.dg/parse: error17.C
Log message:
PR c++/16965
* cp-tree.h (qualified_name_lookup_error): Add parameter.
* name-lookup.c (do_class_using_decl): Restrict set of entities
passed to cp_emit_debug_info_for_using more carefully.
(lookup_qualified_name): Allow lookup_member to return sets of
ambiguous entries.
* parser.c (cp_parser_lookup_name): Add ambiguous_p parameter.
(cp_parser_primary_expression): Handle ambiguous lookups.
(cp_parser_template_name): Adjust use of cp_parser_lookup_name.
(cp_parser_template_argument): Likewise.
(cp_parser_elaborate_type_specifier): Likewise.
(cp_parser_namespace_name): Likewise.
(cp_parser_class_name): Likewise.
(cp_parser_lookup_name_simple): Likewise.
* pt.c (tsubst_qualified_id): Handle ambiguous results.
(tsubst_expr): Likewise.
* semantics.c (qualified_name_lookup_error): Add decl paramter.
For ambiguous lookups, print candidates.
PR c++/16965
* g++.dg/parse/error17.C: New test.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.4277&r2=1.4278
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/cp-tree.h.diff?cvsroot=gcc&r1=1.1030&r2=1.1031
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/name-lookup.c.diff?cvsroot=gcc&r1=1.81&r2=1.82
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/parser.c.diff?cvsroot=gcc&r1=1.236&r2=1.237
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&r1=1.905&r2=1.906
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/semantics.c.diff?cvsroot=gcc&r1=1.423&r2=1.424
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.4149&r2=1.4150
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/parse/error17.C.diff?cvsroot=gcc&r1=NONE&r2=1.1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16965
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/16965] [3.4/3.5 regression] Confusing mismatch in error messages
2004-08-10 14:31 [Bug c++/16965] New: [3.4/3.5 regression] Confusing mismatch in error messages bangerth at dealii dot org
` (3 preceding siblings ...)
2004-08-17 17:32 ` cvs-commit at gcc dot gnu dot org
@ 2004-08-17 17:37 ` mmitchel at gcc dot gnu dot org
4 siblings, 0 replies; 6+ messages in thread
From: mmitchel at gcc dot gnu dot org @ 2004-08-17 17:37 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mmitchel at gcc dot gnu dot org 2004-08-17 17:37 -------
Fixed in GCC 3.5.0.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16965
^ permalink raw reply [flat|nested] 6+ messages in thread
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2004-08-10 14:31 [Bug c++/16965] New: [3.4/3.5 regression] Confusing mismatch in error messages bangerth at dealii dot org
2004-08-10 14:31 ` [Bug c++/16965] " bangerth at dealii dot org
2004-08-15 5:51 ` pinskia at gcc dot gnu dot org
2004-08-17 7:24 ` mmitchel at gcc dot gnu dot org
2004-08-17 17:32 ` cvs-commit at gcc dot gnu dot org
2004-08-17 17:37 ` mmitchel at gcc dot gnu dot org
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