B::Lint man page on MirBSD

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ext::B::B::Lint(3Perl Programmers Reference Guext::B::B::Lint(3p)

NAME
     B::Lint - Perl lint

SYNOPSIS
     perl -MO=Lint[,OPTIONS] foo.pl

DESCRIPTION
     The B::Lint module is equivalent to an extended version of
     the -w option of perl. It is named after the program lint
     which carries out a similar process for C programs.

OPTIONS AND LINT CHECKS
     Option words are separated by commas (not whitespace) and
     follow the usual conventions of compiler backend options.
     Following any options (indicated by a leading -) come lint
     check arguments. Each such argument (apart from the special
     all and none options) is a word representing one possible
     lint check (turning on that check) or is no-foo (turning off
     that check). Before processing the check arguments, a stan-
     dard list of checks is turned on. Later options override
     earlier ones. Available options are:

     context Produces a warning whenever an array is used in an
	     implicit scalar context. For example, both of the
	     lines

		 $foo = length(@bar);
		 $foo = @bar;

	     will elicit a warning. Using an explicit scalar()
	     silences the warning. For example,

		 $foo = scalar(@bar);

     implicit-read and implicit-write
	     These options produce a warning whenever an opera-
	     tion implicitly reads or (respectively) writes to
	     one of Perl's special variables. For example,
	     implicit-read will warn about these:

		 /foo/;

	     and implicit-write will warn about these:

		 s/foo/bar/;

	     Both implicit-read and implicit-write warn about
	     this:

		 for (@a) { ... }

     bare-subs

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ext::B::B::Lint(3Perl Programmers Reference Guext::B::B::Lint(3p)

	     This option warns whenever a bareword is implicitly
	     quoted, but is also the name of a subroutine in the
	     current package. Typical mistakes that it will trap
	     are:

		 use constant foo => 'bar';
		 @a = ( foo => 1 );
		 $b{foo} = 2;

	     Neither of these will do what a naive user would
	     expect.

     dollar-underscore
	     This option warns whenever $_ is used either expli-
	     citly anywhere or as the implicit argument of a
	     print statement.

     private-names
	     This option warns on each use of any variable, sub-
	     routine or method name that lives in a non-current
	     package but begins with an underscore ("_"). Warn-
	     ings aren't issued for the special case of the sin-
	     gle character name "_" by itself (e.g. $_ and @_).

     undefined-subs
	     This option warns whenever an undefined subroutine
	     is invoked. This option will only catch explicitly
	     invoked subroutines such as "foo()" and not indirect
	     invocations such as "&$subref()" or "$obj->meth()".
	     Note that some programs or modules delay definition
	     of subs until runtime by means of the AUTOLOAD
	     mechanism.

     regexp-variables
	     This option warns whenever one of the regexp vari-
	     ables $`, $& or $' is used. Any occurrence of any of
	     these variables in your program can slow your whole
	     program down. See perlre for details.

     all     Turn all warnings on.

     none    Turn all warnings off.

NON LINT-CHECK OPTIONS
     -u Package
	     Normally, Lint only checks the main code of the pro-
	     gram together with all subs defined in package main.
	     The -u option lets you include other package names
	     whose subs are then checked by Lint.

BUGS
     This is only a very preliminary version.

perl v5.8.8		   2005-02-05				2

ext::B::B::Lint(3Perl Programmers Reference Guext::B::B::Lint(3p)

     This module doesn't work correctly on thread-enabled perls.

AUTHOR
     Malcolm Beattie, mbeattie@sable.ox.ac.uk.

perl v5.8.8		   2005-02-05				3

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