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* [Bug c++/66850] New: Adding a forward declaration of a template containing a template template parm causes ICE on valid code
@ 2015-07-12 22:26 ppalka at gcc dot gnu.org
2015-07-12 22:27 ` [Bug c++/66850] " ppalka at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: ppalka at gcc dot gnu.org @ 2015-07-12 22:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66850
Bug ID: 66850
Summary: Adding a forward declaration of a template containing
a template template parm causes ICE on valid code
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ppalka at gcc dot gnu.org
Target Milestone: ---
The following snippet emits an ICE in tsubst:
template <template <typename U, U> class> struct Sort;
template <template <typename U, U> class Comparator>
struct Sort
{
template <int I>
struct less_than
{
Comparator<int, I> a;
};
};
If one removes the initial forward declaration of "struct Sort" then the code
compiles fine.
Branched off from PR65186.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/66850] Adding a forward declaration of a template containing a template template parm causes ICE on valid code
2015-07-12 22:26 [Bug c++/66850] New: Adding a forward declaration of a template containing a template template parm causes ICE on valid code ppalka at gcc dot gnu.org
@ 2015-07-12 22:27 ` ppalka at gcc dot gnu.org
2015-07-12 23:26 ` ppalka at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: ppalka at gcc dot gnu.org @ 2015-07-12 22:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66850
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |ppalka at gcc dot gnu.org
--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
I think I have a fix for this.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/66850] Adding a forward declaration of a template containing a template template parm causes ICE on valid code
2015-07-12 22:26 [Bug c++/66850] New: Adding a forward declaration of a template containing a template template parm causes ICE on valid code ppalka at gcc dot gnu.org
2015-07-12 22:27 ` [Bug c++/66850] " ppalka at gcc dot gnu.org
@ 2015-07-12 23:26 ` ppalka at gcc dot gnu.org
2015-07-15 0:01 ` ppalka at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: ppalka at gcc dot gnu.org @ 2015-07-12 23:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66850
--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Related test cases:
template <typename T, template <typename U, U> class> struct Sort;
template <template <typename U, U> class Comparator>
struct Sort<int, Comparator>
{
template <int I>
struct less_than
{
Comparator<int, I> a;
};
};
==========
template <typename C, C> struct integral_constant {};
template <typename T, template <typename U, U> class> struct Sort;
template <template <typename U, U> class Comparator>
struct Sort<int, Comparator>
{
template <int I> struct less_than:
integral_constant<bool, Comparator<int, I>::value> {};
};
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/66850] Adding a forward declaration of a template containing a template template parm causes ICE on valid code
2015-07-12 22:26 [Bug c++/66850] New: Adding a forward declaration of a template containing a template template parm causes ICE on valid code ppalka at gcc dot gnu.org
2015-07-12 22:27 ` [Bug c++/66850] " ppalka at gcc dot gnu.org
2015-07-12 23:26 ` ppalka at gcc dot gnu.org
@ 2015-07-15 0:01 ` ppalka at gcc dot gnu.org
2015-07-15 2:43 ` ppalka at gcc dot gnu.org
2015-07-15 2:43 ` ppalka at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ppalka at gcc dot gnu.org @ 2015-07-15 0:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66850
--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Author: ppalka
Date: Wed Jul 15 00:01:21 2015
New Revision: 225801
URL: https://gcc.gnu.org/viewcvs?rev=225801&root=gcc&view=rev
Log:
Fix PR c++/66850
gcc/cp/ChangeLog:
PR c++/66850
* pt.c (redeclare_class_template): Set the DECL_CONTEXTs of each
template template parm in the redeclaration.
(lookup_template_class_1): Peel off irrelevant template levels
from current_template_parms before augmenting the argument
list.
gcc/testsuite/ChangeLog:
PR c++/66850
* g++.dg/template/pr66850.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/template/pr66850.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/66850] Adding a forward declaration of a template containing a template template parm causes ICE on valid code
2015-07-12 22:26 [Bug c++/66850] New: Adding a forward declaration of a template containing a template template parm causes ICE on valid code ppalka at gcc dot gnu.org
` (3 preceding siblings ...)
2015-07-15 2:43 ` ppalka at gcc dot gnu.org
@ 2015-07-15 2:43 ` ppalka at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ppalka at gcc dot gnu.org @ 2015-07-15 2:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66850
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |6.0
--- Comment #4 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/66850] Adding a forward declaration of a template containing a template template parm causes ICE on valid code
2015-07-12 22:26 [Bug c++/66850] New: Adding a forward declaration of a template containing a template template parm causes ICE on valid code ppalka at gcc dot gnu.org
` (2 preceding siblings ...)
2015-07-15 0:01 ` ppalka at gcc dot gnu.org
@ 2015-07-15 2:43 ` ppalka at gcc dot gnu.org
2015-07-15 2:43 ` ppalka at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ppalka at gcc dot gnu.org @ 2015-07-15 2:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66850
--- Comment #5 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2015-07-12 22:26 [Bug c++/66850] New: Adding a forward declaration of a template containing a template template parm causes ICE on valid code ppalka at gcc dot gnu.org
2015-07-12 22:27 ` [Bug c++/66850] " ppalka at gcc dot gnu.org
2015-07-12 23:26 ` ppalka at gcc dot gnu.org
2015-07-15 0:01 ` ppalka at gcc dot gnu.org
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