Perl de-reference code reference variable

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LEARN ABOUT DEBIAN

news::formarticle

FormArticle(3pm)					User Contributed Perl Documentation					  FormArticle(3pm)

NAME

       News::FormArticle - derivative of News::Article

SYNOPSIS

	 use News::FormArticle;

       See below for functions available.

DESCRIPTION

       Like News::Article, but designed to be constructed from a file containing form text with substitutions.

       Currently, the source text is substituted as follows:

       Variables are denoted by $NAME or @NAME (where NAME is any simple identifier). (The sequences $$ and @@ denote literal $ and @ characters.)
       Variables of the form $NAME are expected to supply scalar values which are interpolated; variables of the form @NAME are expected to supply
       lists (or references to arrays) which are interpolated with separating newlines.

       Values of variables are found by consulting the list of sources supplied. Each source may be either a reference to a hash, or a reference
       to code.

       Source hashes may contain as values either the desired value (scalar or reference to array), or a typeglob, or a code reference which will
       be called to return the result. (Since typeglobs are allowed values, it is possible to supply a reference to a module symbol table as a
       valid source.)

       Code references supplied as sources are invoked with the variable name (including the leading $ or @) as the only parameter. In the
       degenerate case, all variables accessible in the source scope may be made available for interpolation by supplying the following as a
       source:

	 sub { eval shift }

       If multiple sources are supplied, then each is consulted in turn until a defined value is found.

USAGE

	 use News::FormArticle;

       Exports nothing.

Constructor
       new ( FILE [, SOURCE [...]] )
	   Construct an article from the specified file, performing variable substitution with values supplied by the "SOURCE" parameters (see
	   Description). FILE is any form of data recognised by News::Article's read() method.

AUTHOR

       Andrew Gierth <andrew@erlenstar.demon.co.uk>

COPYRIGHT

       Copyright 1997 Andrew Gierth <andrew@erlenstar.demon.co.uk>

       This code may be used and/or distributed under the same terms as Perl itself.

perl v5.10.1							    2010-04-03							  FormArticle(3pm)

Shell Programming and Scripting