TAP::Parser::Multiplexer

TAP::Parser::MultipleUser3Contributed Perl DocumenTAP::Parser::Multiplexer(3)



NAME
       TAP::Parser::Multiplexer - Multiplex multiple TAP::Parsers

VERSION
       Version 3.17

SYNOPSIS
	   use TAP::Parser::Multiplexer;

	   my $mux = TAP::Parser::Multiplexer->new;
	   $mux->add( $parser1, $stash1 );
	   $mux->add( $parser2, $stash2 );
	   while ( my ( $parser, $stash, $result ) = $mux->next ) {
	       # do stuff
	   }

DESCRIPTION
       "TAP::Parser::Multiplexer" gathers input from multiple TAP::Parsers.
       Internally it calls select on the input file handles for those parsers
       to wait for one or more of them to have input available.

       See TAP::Harness for an example of its use.

METHODS
       Class Methods

       "new"

	   my $mux = TAP::Parser::Multiplexer->new;

       Returns a new "TAP::Parser::Multiplexer" object.

       Instance Methods

       "add"

	 $mux->add( $parser, $stash );

       Add a TAP::Parser to the multiplexer. $stash is an optional opaque
       reference that will be returned from "next" along with the parser and
       the next result.

       "parsers"

	 my $count   = $mux->parsers;

       Returns the number of parsers. Parsers are removed from the multi-
       plexer when their input is exhausted.

       "next"

       Return a result from the next available parser. Returns a list con-
       taining the parser from which the result came, the stash that corre-
       sponds with that parser and the result.

	   my ( $parser, $stash, $result ) = $mux->next;

       If $result is undefined the corresponding parser has reached the end
       of its input (and will automatically be removed from the multiplexer).

       When all parsers are exhausted an empty list will be returned.

	   if ( my ( $parser, $stash, $result ) = $mux->next ) {
	       if ( ! defined $result ) {
		   # End of this parser
	       }
	       else {
		   # Process result
	       }
	   }
	   else {
	       # All parsers finished
	   }

See Also
       TAP::Parser

       TAP::Harness



perl v5.8.8			  2009-05-05	  TAP::Parser::Multiplexer(3)