[Tclxml-users] Re: is there support for early stopping for the parser

[Mats B. <ma...@pr...>]

> From: Tobias Gabele <g....@be...>
> 
> is there already a command somewhere in ::xml or ::sgml to quit parsing
> based on an event. I want to stop parsing once a specific element occurs
> in my elementstartcommand (to save execution time with lenghty xml files
> when only one or few values have to be extracted). I could implement
> this myself if its not there but maybe someone already came across the
> same problem ..
> 

You do 

return -code 3

(break) from your callback proc.
Note a bug if made from element end callback (reported at SourceForge)
Fix in sgml::ParseEvent:ElementClose proc:

    # Invoke callback
    #uplevel #0 $options(-elementendcommand) [list $tag] $empty $ns
    # Mats:
    # Shall be same as sgml::ParseEvent:ElementOpen
    set code [catch {uplevel #0 $options(-elementendcommand) [list $tag] $empty
$ns} msg]
    #puts "   sgml::ParseEvent:ElementClose (exit) state(stack)='$state(stack)'"
    #return {}
    return -code $code -errorinfo $::errorInfo $msg

/Mats