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path::dispatcher::rule

Path::Dispatcher::Rule(3pm)				User Contributed Perl Documentation			       Path::Dispatcher::Rule(3pm)

NAME

       Path::Dispatcher::Rule - predicate and codeblock

SYNOPSIS

	   my $rule = Path::Dispatcher::Rule::Regex->new(
	       regex => qr/^quit/,
	       block => sub { die "Program terminated by user.
" },
	   );

	   $rule->match("die"); # undef, because "die" !~ /^quit/

	   my $match = $rule->match("quit"); # creates a Path::Dispatcher::Match

	   $match->run; # exits the program

DESCRIPTION

       A rule has a predicate and an optional codeblock. Rules can be matched (which checks the predicate against the path) and they can be ran
       (which invokes the codeblock).

       This class is not meant to be instantiated directly, because there is no predicate matching function. Instead use one of the subclasses
       such as Path::Dispatcher::Rule::Tokens.

ATTRIBUTES

   block
       An optional block of code to be run. Please use the "run" method instead of invoking this attribute directly.

   prefix
       A boolean indicating whether this rule can match a prefix of a path. If false, then the predicate must match the entire path. One use-case
       is that you may want a catch-all rule that matches anything beginning with the token "ticket".  The unmatched, latter part of the path will
       be available in the match object.

METHODS

   match path -> match
       Takes a path and returns a Path::Dispatcher::Match object if it matched the predicate, otherwise "undef". The match object contains
       information about the match, such as the results (e.g. for regex, a list of the captured variables), the "leftover" path if "prefix"
       matching was used, etc.

   run
       Runs the rule's codeblock. If none is present, it throws an exception.

perl v5.12.4							    2011-08-30					       Path::Dispatcher::Rule(3pm)

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