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* [Bug c++/57673] New: pack sizeof ... groups ellipsis with preceding expression
@ 2013-06-22 9:23 potswa at mac dot com
2013-06-22 10:05 ` [Bug c++/57673] " potswa at mac dot com
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: potswa at mac dot com @ 2013-06-22 9:23 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57673
Bug ID: 57673
Summary: pack sizeof ... groups ellipsis with preceding
expression
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: potswa at mac dot com
In this example, template g compiles without issue but each member in d chokes
the parser. The only difference is grouping parentheses, which shouldn't be
significant.
There may be more than one issue. A left paren seems to get the parser into a
good state to accept sizeof ... , but it starts in a bad state at the beginning
of an initializer, and seeing a qualified-id puts it into a bad state.
(Reversing the order of subexpressions and writing ( sizeof ... ( p ) - i::m )
does not produce an error.)
struct i { static constexpr int m = 5; };
template< int ... p >
struct g {
static constexpr int m = i::m - ( sizeof ... ( p ) );
int n = ( sizeof ... ( p ) );
};
template< int ... p >
struct d {
static constexpr int m = ( i::m - sizeof ... ( p ) );
int n = sizeof ... ( p );
};
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug c++/57673] pack sizeof ... groups ellipsis with preceding expression 2013-06-22 9:23 [Bug c++/57673] New: pack sizeof ... groups ellipsis with preceding expression potswa at mac dot com @ 2013-06-22 10:05 ` potswa at mac dot com 2013-07-30 15:30 ` paolo.carlini at oracle dot com ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: potswa at mac dot com @ 2013-06-22 10:05 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57673 --- Comment #1 from David Krauss <potswa at mac dot com> --- Oops, g::m does not need to be static constexpr to produce an error; the specifiers should be removed to produce a minimal test. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/57673] pack sizeof ... groups ellipsis with preceding expression 2013-06-22 9:23 [Bug c++/57673] New: pack sizeof ... groups ellipsis with preceding expression potswa at mac dot com 2013-06-22 10:05 ` [Bug c++/57673] " potswa at mac dot com @ 2013-07-30 15:30 ` paolo.carlini at oracle dot com 2013-07-30 16:47 ` paolo.carlini at oracle dot com ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: paolo.carlini at oracle dot com @ 2013-07-30 15:30 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57673 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2013-07-30 Ever confirmed|0 |1 --- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> --- With current mainline and 4_8-branch, I can only reproduce the problem with d::n, not that with d::m. g is in any case fine. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/57673] pack sizeof ... groups ellipsis with preceding expression 2013-06-22 9:23 [Bug c++/57673] New: pack sizeof ... groups ellipsis with preceding expression potswa at mac dot com 2013-06-22 10:05 ` [Bug c++/57673] " potswa at mac dot com 2013-07-30 15:30 ` paolo.carlini at oracle dot com @ 2013-07-30 16:47 ` paolo.carlini at oracle dot com 2013-07-30 22:39 ` paolo.carlini at oracle dot com 2013-07-31 14:07 ` paolo.carlini at oracle dot com 4 siblings, 0 replies; 6+ messages in thread From: paolo.carlini at oracle dot com @ 2013-07-30 16:47 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57673 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |paolo.carlini at oracle dot com Target Milestone|--- |4.9.0 --- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> --- Mine. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/57673] pack sizeof ... groups ellipsis with preceding expression 2013-06-22 9:23 [Bug c++/57673] New: pack sizeof ... groups ellipsis with preceding expression potswa at mac dot com ` (2 preceding siblings ...) 2013-07-30 16:47 ` paolo.carlini at oracle dot com @ 2013-07-30 22:39 ` paolo.carlini at oracle dot com 2013-07-31 14:07 ` paolo.carlini at oracle dot com 4 siblings, 0 replies; 6+ messages in thread From: paolo.carlini at oracle dot com @ 2013-07-30 22:39 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57673 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> --- Fixed for 4.9.0. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/57673] pack sizeof ... groups ellipsis with preceding expression 2013-06-22 9:23 [Bug c++/57673] New: pack sizeof ... groups ellipsis with preceding expression potswa at mac dot com ` (3 preceding siblings ...) 2013-07-30 22:39 ` paolo.carlini at oracle dot com @ 2013-07-31 14:07 ` paolo.carlini at oracle dot com 4 siblings, 0 replies; 6+ messages in thread From: paolo.carlini at oracle dot com @ 2013-07-31 14:07 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57673 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |nmm1 at cam dot ac.uk --- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> --- *** Bug 58037 has been marked as a duplicate of this bug. *** ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2013-07-31 14:07 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-06-22 9:23 [Bug c++/57673] New: pack sizeof ... groups ellipsis with preceding expression potswa at mac dot com 2013-06-22 10:05 ` [Bug c++/57673] " potswa at mac dot com 2013-07-30 15:30 ` paolo.carlini at oracle dot com 2013-07-30 16:47 ` paolo.carlini at oracle dot com 2013-07-30 22:39 ` paolo.carlini at oracle dot com 2013-07-31 14:07 ` paolo.carlini at oracle dot com
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