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* [Bug c++/13517] New: confusing error message for reference on a constant
@ 2003-12-30 12:49 debian-gcc at lists dot debian dot org
2003-12-30 17:33 ` [Bug c++/13517] " pinskia at gcc dot gnu dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: debian-gcc at lists dot debian dot org @ 2003-12-30 12:49 UTC (permalink / raw)
To: gcc-bugs
[forwarded from http://bugs.debian.org/216209]
seen with 3.3.2.
The following program consists of two classes, both with a
parametrized method. Depending on the parameter type g++ the
compilation fails or not...
-- snip --
class E1 {
public:
template <class T>
void print(T bla) { };
};
class E2 {
public:
// same as above but with a reference
template <class T>
void print(T& bla) { };
};
void foo1() {
E1 e;
// works
e.print("hurz");
// works too
e.print(23);
};
void foo2() {
E2 e;
// works
e.print("hurz");
// fails!
e.print(23);
};
int main () {
};
-- snip --
riff /tmp> g++ -Wall temptest1.cc
temptest1.cc: In function `void foo2()':
temptest1.cc:33: error: no matching function for call to
`E2::print(int)'
temptest1.cc:13: error: candidates are: void E2::print(T&) [with T =
int]
Exitcode 1
riff /tmp> g++ --version
g++ (GCC) 3.3.2 20031005 (Debian prerelease)
[...]
This behavoir is at least inconsistent and I believe it to be
buggy. However, the Intel Compiler fails on the same line, so maybe
it's a special case in the C++-specs?!
Cheers
Thimo
Followup:
I asked a second person when I filed the original bug report but now a
third person saw the problem. Yes, the call tries to create a
reference on a constant and thus cannot compile. But in that case, the
error-message is very misleading.
I've already changed the bug title and changed the severity to
wishlist.
Cheers
Thimo
--
Summary: confusing error message for reference on a constant
Product: gcc
Version: 3.3.3
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: debian-gcc at lists dot debian dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13517
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/13517] confusing error message for reference on a constant
2003-12-30 12:49 [Bug c++/13517] New: confusing error message for reference on a constant debian-gcc at lists dot debian dot org
@ 2003-12-30 17:33 ` pinskia at gcc dot gnu dot org
2003-12-30 18:23 ` falk at debian dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-12-30 17:33 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2003-12-30 17:17 -------
It is not a special case in the C++ standard at all, the problem is that you are trying to a constant
and make it a reference which is wrong. Yes the error message is confussing, I thought I saw a
bug like this one asking for a better error message.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |diagnostic
Last reconfirmed|0000-00-00 00:00:00 |2003-12-30 17:17:41
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13517
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/13517] confusing error message for reference on a constant
2003-12-30 12:49 [Bug c++/13517] New: confusing error message for reference on a constant debian-gcc at lists dot debian dot org
2003-12-30 17:33 ` [Bug c++/13517] " pinskia at gcc dot gnu dot org
@ 2003-12-30 18:23 ` falk at debian dot org
2003-12-30 19:45 ` pinskia at gcc dot gnu dot org
2004-01-01 2:47 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: falk at debian dot org @ 2003-12-30 18:23 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From falk at debian dot org 2003-12-30 18:02 -------
String literals are in fact a sspecial case in the C++ standard, since
there is an implicit conversion to (non-const) char*. It is deprecated though,
and g++ should probably warn about it.
Aso for the error message, I can't find it that bad; it says there's no
matching method, and that's exactly what the problem is. I don't think
g++ should list for every candidate why it doesn't match, these error messages
tend to be long enough as they are.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13517
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/13517] confusing error message for reference on a constant
2003-12-30 12:49 [Bug c++/13517] New: confusing error message for reference on a constant debian-gcc at lists dot debian dot org
2003-12-30 17:33 ` [Bug c++/13517] " pinskia at gcc dot gnu dot org
2003-12-30 18:23 ` falk at debian dot org
@ 2003-12-30 19:45 ` pinskia at gcc dot gnu dot org
2004-01-01 2:47 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-12-30 19:45 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2003-12-30 19:22 -------
The conversion between strings and char* is another for another PR which is already
filed as PR 8586.
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|minor |enhancement
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13517
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/13517] confusing error message for reference on a constant
2003-12-30 12:49 [Bug c++/13517] New: confusing error message for reference on a constant debian-gcc at lists dot debian dot org
` (2 preceding siblings ...)
2003-12-30 19:45 ` pinskia at gcc dot gnu dot org
@ 2004-01-01 2:47 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-01-01 2:47 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-01-01 02:47 -------
This is a dup of bug 2112.
*** This bug has been marked as a duplicate of 2112 ***
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13517
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2004-01-01 2:47 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2003-12-30 12:49 [Bug c++/13517] New: confusing error message for reference on a constant debian-gcc at lists dot debian dot org
2003-12-30 17:33 ` [Bug c++/13517] " pinskia at gcc dot gnu dot org
2003-12-30 18:23 ` falk at debian dot org
2003-12-30 19:45 ` pinskia at gcc dot gnu dot org
2004-01-01 2:47 ` pinskia at gcc dot gnu dot org
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