Re: c++/9103: problems constructing from temporaries

Re: c++/9103: problems constructing from temporaries

[bangerth]

Synopsis: problems constructing from temporaries

State-Changed-From-To: analyzed->closed
State-Changed-By: bangerth
State-Changed-When: Mon Apr  7 14:04:08 2003
State-Changed-Why:
    Fixed in mainline.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9103

Re: c++/9103: problems constructing from temporaries

[Giovanni Bajo]

The following reply was made to PR c++/9103; it has been noted by GNATS.

From: "Giovanni Bajo" <giovannibajo@libero.it>
To: <gcc-gnats@gcc.gnu.org>,
	<darryl.green@unitab.com.au>,
	<gcc-bugs@gcc.gnu.org>,
	<nobody@gcc.gnu.org>,
	<gcc-prs@gcc.gnu.org>
Cc: "Wolfgang Bangerth" <bangerth@ices.utexas.edu>
Subject: Re: c++/9103: problems constructing from temporaries
Date: Mon, 7 Apr 2003 13:01:50 +0200

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&p
 r=9103
 
 Reconfirmed with 2.95 -> 3.3 as of today, but it should be tested with 3.4
 as well (since it seems a parser problem) - please bump [date] after that.
 
 Giovanni Bajo
 

Re: c++/9103: problems constructing from temporaries

[bangerth]

Synopsis: problems constructing from temporaries

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Fri Jan 24 16:27:49 2003
State-Changed-Why:
    Giovanni and Andrew already analyzed this

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9103

Re: c++/9103: problems constructing from temporaries

[Giovanni Bajo]

The following reply was made to PR c++/9103; it has been noted by GNATS.

From: "Giovanni Bajo" <giovannibajo@libero.it>
To: <gcc-gnats@gcc.gnu.org>,
	<darryl.green@unitab.com.au>,
	<gcc-bugs@gcc.gnu.org>,
	<nobody@gcc.gnu.org>,
	<gcc-prs@gcc.gnu.org>
Cc:  
Subject: Re: c++/9103: problems constructing from temporaries
Date: Fri, 24 Jan 2003 17:11:38 +0100

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&p
 r=9103
 
 Epurated test case:
 -----------------------
 struct A
 {
     A(const A& ) {}
     A(A* ) {}
     A(  ) {}
 
     void foo(void);
 };
 
 int main()
 {
      A a(A(A(new A())));
      a.foo();
 }
 -----------------------
 ice7.cpp: In function `int main()':
 ice7.cpp:116: request for member `foo' in `a()', which is of non-aggregate
 type
    `A ()()'
 
 This is on GCC 3.2. The above should clearly compile, since the line cannot
 be a function declaration (because of the 'new' in it). GCC seems to be
 confused because of the two temporaries, and you can see that also the
 dumped type is wrong. If you remove one temporary:
 
 A a(A(new A()));
 
 the code compiles correctly.  If you remove the 'new':
 
  A a(A(A(A())));
 
 the code fails as expected, but the error shows there is still some
 confusion:
 
 ice7.cpp:116: request for member `foo' in `a(A (*)(A (*)()))', which is of
    non-aggregate type `A ()(A (*)(A (*)()))'
 
 since it's missing the third function pointer (should be `A ()(A (*)(A (*)(A
 (*)())))'.
 
 For the original poster, I'd suggest using the alternative syntax A a =
 A(whatever), unless the constructors are explicit.
 
 Giovanni Bajo
 

Re: c++/9103: problems constructing from temporaries

[Andrew Pinski]

The following reply was made to PR c++/9103; it has been noted by GNATS.

From: Andrew Pinski <pinskia@physics.uc.edu>
To: darryl.green@unitab.com.au
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: c++/9103: problems constructing from temporaries
Date: Tue, 31 Dec 2002 14:42:49 -0500

 This is fixed with the new parser on 3.4, it was not fixed when 3.3 was 
 branched though (gcc version 3.3 20021216 (experimental)).
 
 Thanks,
 Andrew Pinski
 

Re: c++/9103: problems constructing from temporaries

[Darryl Green]

The following reply was made to PR c++/9103; it has been noted by GNATS.

From: "Darryl Green" <Darryl.Green@tabq.com.au>
To: "Darryl Green" <Darryl.Green@tabq.com.au>,
	<gcc-gnats@gcc.gnu.org>,
	<gcc-prs@gcc.gnu.org>,
	<gcc-bugs@gcc.gnu.org>,
	<nobody@gcc.gnu.org>
Cc:  
Subject: Re: c++/9103: problems constructing from temporaries
Date: Tue, 31 Dec 2002 12:51:32 +1000

 This is a multi-part message in MIME format.
 
 ------_=_NextPart_001_01C2B077.865CD791
 Content-Type: multipart/alternative;
 	boundary="----_=_NextPart_002_01C2B077.865CD791"
 
 
 ------_=_NextPart_002_01C2B077.865CD791
 Content-Type: text/plain;
 	charset="us-ascii"
 Content-Transfer-Encoding: quoted-printable
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=3Dview%20audit-trail&database=3D=
 g
 cc&pr=3D9103
 <http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=3Dview%20audit-trail&database=
 =3D
 gcc&pr=3D9103> =20
 
 Sorry - I tried to attach 2 files when I submitted the above report but
 somehow managed to attach only the results file. Attached to this email
 is the other (more useful) one - the source!
 
 regards
 
 Darryl Green.
 
 =20
 
 =20
 
 =20
 
 =20
 
 
 ------_=_NextPart_002_01C2B077.865CD791
 Content-Type: text/html;
 	charset="us-ascii"
 Content-Transfer-Encoding: quoted-printable
 
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
 <html>
 
 <head>
 <meta http-equiv=3DContent-Type content=3D"text/html; =
 charset=3Dus-ascii">
 <meta name=3DGenerator content=3D"Microsoft Word 10 (filtered)">
 
 <style>
 <!--
  /* Style Definitions */
  p.MsoNormal, li.MsoNormal, div.MsoNormal
 	{margin:0cm;
 	margin-bottom:.0001pt;
 	font-size:12.0pt;
 	font-family:"Times New Roman";}
 a:link, span.MsoHyperlink
 	{color:blue;
 	text-decoration:underline;}
 a:visited, span.MsoHyperlinkFollowed
 	{color:blue;
 	text-decoration:underline;}
 p
 	{margin-right:0cm;
 	margin-left:0cm;
 	font-size:12.0pt;
 	font-family:"Times New Roman";}
 span.EmailStyle18
 	{font-family:Arial;}
 @page Section1
 	{size:595.3pt 841.9pt;
 	margin:72.0pt 90.0pt 72.0pt 90.0pt;}
 div.Section1
 	{page:Section1;}
 -->
 </style>
 
 </head>
 
 <body lang=3DEN-AU link=3Dblue vlink=3Dblue>
 
 <div class=3DSection1>
 
 <p><font size=3D2 face=3DArial><span =
 style=3D'font-size:10.0pt;font-family:Arial'><a
 href=3D"http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=3Dview%20audit-trail&a=
 mp;database=3Dgcc&amp;pr=3D9103"><!-- Converted from text/rtf format =
 -->http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=3Dview%20audit-trail&amp;da=
 tabase=3Dgcc&amp;pr=3D9103</a></span></font>
 </p>
 
 <p><font size=3D3 face=3D"Times New Roman"><span =
 style=3D'font-size:12.0pt'>Sorry &#8211;
 I tried to attach 2 files when I submitted the above report but somehow =
 managed
 to attach only the results file. Attached to this email is the other =
 (more
 useful) one &#8211; the source!</span></font></p>
 
 <p><font size=3D3 face=3D"Times New Roman"><span =
 style=3D'font-size:12.0pt'>regards</span></font></p>
 
 <p><font size=3D3 face=3D"Times New Roman"><span =
 style=3D'font-size:12.0pt'>Darryl Green</span></font>.</p>
 
 <p><font size=3D3 face=3D"Times New Roman"><span =
 style=3D'font-size:12.0pt'>&nbsp;</span></font></p>
 
 <p><font size=3D3 face=3D"Times New Roman"><span =
 style=3D'font-size:12.0pt'>&nbsp;</span></font></p>
 
 <p><font size=3D3 face=3D"Times New Roman"><span =
 style=3D'font-size:12.0pt'>&nbsp;</span></font></p>
 
 <p><font size=3D3 face=3D"Times New Roman"><span =
 style=3D'font-size:12.0pt'>&nbsp;</span></font></p>
 
 </div>
 
 </body>
 
 </html>
 =00
 ------_=_NextPart_002_01C2B077.865CD791--
 
 ------_=_NextPart_001_01C2B077.865CD791
 Content-Type: application/octet-stream;
 	name="test.cpp"
 Content-Transfer-Encoding: base64
 Content-Description: test.cpp
 Content-Disposition: attachment;
 	filename="test.cpp"
 
 Ly8gdHJpdmlhbC9zaWxseSAgk3BvbGljeZQNDQpzdHJ1Y3QgaW1wbF90DQ0Kew0NCiAgICBpbnQg
 aTsNDQogICAgaW1wbF90KGludCB2PTApIDogaSh2KSB7fQ0NCiAgICBpbnQgZ2V0KCkge3JldHVy
 biBpOyB9DQ0KICAgIHZvaWQgc2V0KGludCB2KSB7aSA9IHY7IH0NDQp9Ow0NCg0NCi8vIHR5cGVk
 ZWYgYm9vc3Q6OnNoYXJlZF9wdHI8aW1wbF90PiBpbXBsX3B0cl90Ow0NCi8vIHF1aWNrIGhhY2sg
 dG8gcmVtb3ZlIGRlcGVuZGVuY3kgb24gc2hhcmVkX3B0ciBhbmQgdGVtcGxhdGUgaGFuZGxpbmcg
 Zm9yIHRlc3RpbmcgdXNpbmcgYSBjb3B5YWJsZSBpbXBsDQ0Kc3RydWN0IGltcGxfcHRyX3QNDQp7
 DQ0KICAgIGltcGxfdCBpOw0NCiAgICBpbXBsX3B0cl90KGltcGxfdCogcGltcGwpIDogaSgqcGlt
 cGwpIHt9DQ0KDQ0KICAgIGltcGxfdCYgb3BlcmF0b3IqKCkge3JldHVybiBpO30NDQogICAgaW1w
 bF90KiBvcGVyYXRvci0+KCkge3JldHVybiAmaTt9IA0NCn07DQ0KDQ0Kc3RydWN0IHByb3h5X3QN
 DQp7DQ0KICAgIGltcGxfcHRyX3QgcGltcGw7DQ0KICAgIHByb3h5X3QoaW1wbF9wdHJfdCBwaSkg
 OiBwaW1wbChwaSkge30NDQogICAgLy8gcHJveHlfdChpbXBsX3QqIHBpKSA6IHBpbXBsKHBpKSB7
 fSAvLyB1bmNvbW1lbnQgYXMgd29yay1hcm91bmQNDQogICAgaW50IGdldCgpIHtyZXR1cm4gcGlt
 cGwtPmdldCgpOyB9Ow0NCiAgICB2b2lkIHNldChpbnQgdikge3BpbXBsLT5zZXQodik7IH07DQ0K
 fTsNDQoNDQovLyBpbiByZWFsaXR5IHRoaXMgaXMgb2YgY291cnNlIHRlbXBsYXRlZCwgYnV0IEkg
 bGVmdCB0aGF0IGRldGFpbCBvdXQgYXMgaXQgdHVybnMgb3V0IHRvIGJlIGlycmVsZXZhbnQuLi4N
 DQpzdHJ1Y3QgcG9saWN5X3VzZXINDQp7DQ0KICAgIHByb3h5X3QgcG9sOw0NCiAgICBwb2xpY3lf
 dXNlcihjb25zdCBwcm94eV90JiBwb2xpY3kpIDogcG9sKHBvbGljeSkge30NDQogICAgdm9pZCBk
 b19zdHVmZigpDQ0KICAgIHsNDQogICAgICAgIHBvbC5zZXQocG9sLmdldCgpKzEpOw0NCiAgICB9
 DQ0KDQ0KfTsNDQoNDQppbnQgbWFpbigpDQ0Kew0NCnsNDQogICAgLy8gaXQgaXMgb2YgY291cnNl
 IHBvc3NpYmxlIHRvIGhhdmUgYW4gaW5zdGFuY2Ugb2YgZWFjaCB0eXBlIGluIHRoaXMgaGllcmFy
 Y2h5DQ0KICAgIGltcGxfdCogaW1wID0gbmV3IGltcGxfdCg1KTsNDQogICAgaW1wbF9wdHJfdCBp
 bXBfcHRyKGltcCk7DQ0KICAgIHByb3h5X3QgcHJveChpbXBfcHRyKTsNDQogICAgcG9saWN5X3Vz
 ZXIgdXNlcihwcm94KTsNDQogICAgdXNlci5kb19zdHVmZigpOw0NCn0NDQp7DQ0KICAgIC8vIGlu
 IHJlYWxpdHkgSSBtaWdodCBkbyB0aGlzIGluc3RlYWQNDQogICAgcG9saWN5X3VzZXIgdXNlcl9m
 cm9tX3RlbXBzKCBwcm94eV90KCBpbXBsX3B0cl90KCBuZXcgaW1wbF90KDUwKSApICkgKTsNDQog
 ICAgdXNlcl9mcm9tX3RlbXBzLmRvX3N0dWZmKCk7IC8vIGdlbmVyYXRlcyBlcnJvciBpbmRpY2F0
 aW5nIGRlY2wgd2FzIHBhcnNlZCBpbmNvcnJlY3RseQ0NCn0NDQp7DQ0KICAgIC8vIGV4Y2VwdCB0
 aGF0IHdpdGggZ2NjIDMuMiB0aGF0IGRpZG4ndCBjb21waWxlLiBUaGlzIGRvZXM6DQ0KICAgIHBy
 b3h5X3QgcHJveHlfZnJvbV90ZW1wKCBpbXBsX3B0cl90KCBuZXcgaW1wbF90KDUwKSApICk7DQ0K
 ICAgIHBvbGljeV91c2VyIHVzZXJfZnJvbV90ZW1wcyggcHJveHlfZnJvbV90ZW1wICk7DQ0KICAg
 IHVzZXJfZnJvbV90ZW1wcy5kb19zdHVmZigpOw0NCn0NDQp7DQ0KICAgIC8vIG9wdGltaXN0aWNh
 bGx5LCBob3BlIHRoYXQgY29uc3RydWN0aW9uIG9mIGltcGxfcHRyX3QgZnJvbSBpbXBsX3QqIHdp
 bGwgb2NjdXIgaW1wbGljaXRseT8NDQogICAgcG9saWN5X3VzZXIgdXNlcl9mcm9tX3RlbXBzKCBw
 cm94eV90KCBuZXcgaW1wbF90KDUwKSApICk7IC8vIGNvbXBpbGVzDQ0KICAgIHVzZXJfZnJvbV90
 ZW1wcy5kb19zdHVmZigpOyAvLyBubyBlcnJvcg0NCn0NDQoNDQp9DQ0KDQ0K
 
 ------_=_NextPart_001_01C2B077.865CD791--

c++/9103: problems constructing from temporaries

[darryl.green]

>Number:         9103
>Category:       c++
>Synopsis:       problems constructing from temporaries
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Sun Dec 29 21:46:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Darryl Green
>Release:        gcc version 3.2.1 20020924 (Debian prerelease)
>Organization:
>Environment:
Linux 2.4.19
>Description:
Moderately complex object declaration/construction involving multiple temporaries is not handled correctly - gcc seems to be interpreting it as a function declaration.

Note: fwiw Comeau online and MSVC 7 compile this code.
>How-To-Repeat:
Compile the code. Examine error output.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="results"
Content-Disposition: inline; filename="results"

test.cpp: In function `int main()':
test.cpp:55: request for member `do_stuff' in `user_from_temps()', which is of 
   non-aggregate type `policy_user ()()'