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IO::Lambda::Backtrace(User Contributed Perl DocumentatIO::Lambda::Backtrace(3)

NAME
       IO::Lambda::Backtrace - backtrace chains	of events

DESCRIPTION
       The module makes	it easier to debug chains of events, when a lambda
       awaits for another, this	one in turn for	another, etc etc. The class
       "IO::Lambda::Backtrace" represents a set	of such	stacks,	because	a
       lambda can be awaited by	more than one lambda. Each stack is an array
       of items	where each contains the	caller lambda and the invocation
       point. The class	provides helper	methods	for printing this information
       in readable form.

       The module relies on the	debug information about	invocation points
       collected by "IO::Lambda". By default, there's very little information
       collected, so in	order to increase verbosity use
       "IO::Lambda::DEBUG_CALLER" flag,	either directly	or through
       "$ENV{IO_LAMBDA_DEBUG} =	'caller'". If the flag is set to 1, lambdas
       collect invocation points. If the flag is set to	2, then	also the
       additional perl stack trace is added.

SYNOPSIS
	 use IO::Lambda;
	 $IO::Lambda::DEBUG_CALLER = 1;

	 lambda	{
	    ...
	    warn this->	backtrace-> as_text;
	 }

       or from command line

	  env IO_LAMBDA_DEBUG=caller=2 ./myscript

API
       new($lambda)
	   Extracts the	information of the current chain of events and creates
	   a new blessed reference of it.

       as_text
	   Returns the backtrace information formatted as text,	ready to
	   display

       cluck
	   Warns with the backtrace log

       confess
	   Dies	with the backtrace log

AUTHOR
       Dmitry Karasik, <dmitry@karasik.eu.org>.

       The ideas of backtracing	threads	of events, and implementing backtrace
       objects passable	through	execition stack	are proposed by	Ben Tilly.

perl v5.32.0			  2012-03-14	      IO::Lambda::Backtrace(3)

NAME | DESCRIPTION | SYNOPSIS | API | AUTHOR

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