* [Bug translator/11005] New: compile-time error catching
@ 2009-11-23 18:52 dsmith at redhat dot com
2009-11-23 20:56 ` [Bug translator/11005] compile-time error catching w/ const-propagation fche at redhat dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: dsmith at redhat dot com @ 2009-11-23 18:52 UTC (permalink / raw)
To: systemtap
Similar to bug #11004, it would be great if we had some syntax to tolerate
compile-time errors associated with $variable evaluation.
This would allow us to get rid of several kernel version checks and check for
$variable existence instead. We could then turn something like this (from
syscall.poll):
====
%( kernel_vr > "2.6.15-1.1831" %?
timeout = $timeout_msecs
%:
timeout = $timeout
%)
====
into something like this:
====
timeout = @catch($timeout_msecs, $timeout)
====
Where the syntax is something like '@catch($expr, $backup-expr)'.
--
Summary: compile-time error catching
Product: systemtap
Version: unspecified
Status: NEW
Severity: enhancement
Priority: P2
Component: translator
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: dsmith at redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=11005
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug translator/11005] compile-time error catching w/ const-propagation 2009-11-23 18:52 [Bug translator/11005] New: compile-time error catching dsmith at redhat dot com @ 2009-11-23 20:56 ` fche at redhat dot com 2009-11-23 21:09 ` dsmith at redhat dot com ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: fche at redhat dot com @ 2009-11-23 20:56 UTC (permalink / raw) To: systemtap ------- Additional Comments From fche at redhat dot com 2009-11-23 20:56 ------- Further discussion seems to favor this syntax: @defined($expression) -- integer-valued, evaluated at translation time This requires const-propagated conditionals (if else AND ? :) as in println (@defined($foo) ? $foo : $bar) if (@defined($bar)) { println($bar) } -- What |Removed |Added ---------------------------------------------------------------------------- Summary|compile-time error catching |compile-time error catching | |w/ const-propagation http://sourceware.org/bugzilla/show_bug.cgi?id=11005 ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug translator/11005] compile-time error catching w/ const-propagation 2009-11-23 18:52 [Bug translator/11005] New: compile-time error catching dsmith at redhat dot com 2009-11-23 20:56 ` [Bug translator/11005] compile-time error catching w/ const-propagation fche at redhat dot com @ 2009-11-23 21:09 ` dsmith at redhat dot com 2010-01-18 20:18 ` fche at redhat dot com 2010-02-19 23:39 ` [Bug translator/11005] @defined() predicate for compile-time $var error catching fche at redhat dot com 3 siblings, 0 replies; 5+ messages in thread From: dsmith at redhat dot com @ 2009-11-23 21:09 UTC (permalink / raw) To: systemtap -- What |Removed |Added ---------------------------------------------------------------------------- BugsThisDependsOn| |10719 http://sourceware.org/bugzilla/show_bug.cgi?id=11005 ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug translator/11005] compile-time error catching w/ const-propagation 2009-11-23 18:52 [Bug translator/11005] New: compile-time error catching dsmith at redhat dot com 2009-11-23 20:56 ` [Bug translator/11005] compile-time error catching w/ const-propagation fche at redhat dot com 2009-11-23 21:09 ` dsmith at redhat dot com @ 2010-01-18 20:18 ` fche at redhat dot com 2010-02-19 23:39 ` [Bug translator/11005] @defined() predicate for compile-time $var error catching fche at redhat dot com 3 siblings, 0 replies; 5+ messages in thread From: fche at redhat dot com @ 2010-01-18 20:18 UTC (permalink / raw) To: systemtap -- What |Removed |Added ---------------------------------------------------------------------------- OtherBugsDependingO| |11179 nThis| | http://sourceware.org/bugzilla/show_bug.cgi?id=11005 ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug translator/11005] @defined() predicate for compile-time $var error catching 2009-11-23 18:52 [Bug translator/11005] New: compile-time error catching dsmith at redhat dot com ` (2 preceding siblings ...) 2010-01-18 20:18 ` fche at redhat dot com @ 2010-02-19 23:39 ` fche at redhat dot com 3 siblings, 0 replies; 5+ messages in thread From: fche at redhat dot com @ 2010-02-19 23:39 UTC (permalink / raw) To: systemtap -- What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|systemtap at sources dot |fche at redhat dot com |redhat dot com | Status|NEW |ASSIGNED Summary|compile-time error catching |@defined() predicate for |w/ const-propagation |compile-time $var error | |catching http://sourceware.org/bugzilla/show_bug.cgi?id=11005 ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2010-02-19 23:39 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2009-11-23 18:52 [Bug translator/11005] New: compile-time error catching dsmith at redhat dot com 2009-11-23 20:56 ` [Bug translator/11005] compile-time error catching w/ const-propagation fche at redhat dot com 2009-11-23 21:09 ` dsmith at redhat dot com 2010-01-18 20:18 ` fche at redhat dot com 2010-02-19 23:39 ` [Bug translator/11005] @defined() predicate for compile-time $var error catching fche at redhat dot com
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