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Devel::TraceSAX(3)    User Contributed Perl Documentation   Devel::TraceSAX(3)

NAME
       Devel::TraceSAX - Trace SAX events

SYNOPSIS
	 ## From the command line:
	   perl	-d:TraceSAX	      script.pl
	   perl	-d:TraceSAX=-dump_all script.pl

	 ## procedural:
	   use Devel::TraceSAX;

	   trace_SAX $obj1;

	 ## Emitting additional	messages
	   use Devel::TraceSAX qw( emit_trace_SAX_message );

	   emit_trace_SAX_message "this	is a test";

DESCRIPTION
       WARNING:	alpha code alert!!! This module	and its	API subject to change,
       possibly	radically :).

       Traces SAX events in a program.	Works by applying Devel::TraceCalls to
       a tracer	on the desired classes for all known SAX event types
       (according to XML::SAX::EventMethodMaker	and XML::SAX::Machines).

   Emitting messages if	and only if Devel::TraceCalls is loaded
	   use constant	_tracing => defined $Devel::TraceSAX::VERSION;

	   BEGIN {
	       eval "use Devel::TraceCalls qw( emit_trace_SAX_message )"
		   if _tracing;
	   }

	   emit_trace_SAX_message( "hi!" ) if _tracing;

       Using the constant "_tracing" allows expressions	like

	   emit_trace_SAX_message(...) if _tracing;

       to be optimized away at compile time, resulting in little or no
       performance penalty.

TODO
       Add a lot more formatting clean-up.

LIMITATIONS
       This module overloads CORE::GLOBAL::require when	used from the command
       line via	-d: or -M.  For	some reason this causes	spurious warnings like

	  Unquoted string "fields" may clash with future reserved word at /usr/local/lib/perl5/5.6.1/base.pm line 87.

       That line looks like "require fields;", so it looks like	the (*)
       prototype on our	CORE::GLOBAL::require =	sub (*)	{...} isn't having
       it's desired effect.  It	would be nice to clean these up.

AUTHOR
	   Barrie Slaymaker <barries@slaysys.com>

LICENSE
       You may use this	under the terms	of either the Artistic License or any
       version of the BSD or GPL licenses :).

perl v5.32.1			  2002-02-04		    Devel::TraceSAX(3)
NAME | SYNOPSIS | DESCRIPTION | TODO | LIMITATIONS | AUTHOR | LICENSE

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