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Perl::Critic:Perl::CriUser:ContributeduPerlpDocumentationarewordFileHandles(3)

NAME
       Perl::Critic::Policy::InputOutput::ProhibitBarewordFileHandles -	Write
       "open my	$fh, q{<}, $filename;" instead of "open	FH, q{<}, $filename;".

AFFILIATION
       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION
       Using bareword symbols to refer to file handles is particularly evil
       because they are	global,	and you	have no	idea if	that symbol already
       points to some other file handle.  You can mitigate some	of that	risk
       by "local"izing the symbol first, but that's pretty ugly.  Since	Perl
       5.6, you	can use	an undefined scalar variable as	a lexical reference to
       an anonymous filehandle.	 Alternatively,	see the	IO::Handle or IO::File
       or FileHandle modules for an object-oriented approach.

	   open	FH, '<', $some_file;	       #not ok
	   open	my $fh,	'<', $some_file;       #ok
	   my $fh = IO::File->new($some_file); #ok

       There are three exceptions: STDIN, STDOUT and STDERR.  These three
       standard	filehandles are	always package variables.

CONFIGURATION
       This Policy is not configurable except for the standard options.

SEE ALSO
       IO::Handle

       IO::File

AUTHOR
       Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>

COPYRIGHT
       Copyright (c) 2005-2011 Imaginative Software Systems.  All rights
       reserved.

       This program is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.

perl v5.24.1 Perl::Critic::Policy::InputOutput::ProhibitBarewordFileHandles(3)

NAME | AFFILIATION | DESCRIPTION | CONFIGURATION | SEE ALSO | AUTHOR | COPYRIGHT

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