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B::Lint - Perl lint |
- NAME
- SUPPORTED PLATFORMS
- SYNOPSIS
- DESCRIPTION
- OPTIONS AND LINT CHECKS
- NON LINT-CHECK OPTIONS
- BUGS
- AUTHOR
NAME
B::Lint - Perl lint
SUPPORTED PLATFORMS
- Linux
- Solaris
- Windows
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 standard 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); $foo = @bar; will elicit a warning. Using an explicit B<scalar()> silences the warning. For example,$foo = scalar(@bar); - implicit-read and implicit-write
-
These options produce a warning whenever an operation 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) { ... } - dollar-underscore
- This option warns whenever $_ is used either explicitly anywhere or as the implicit argument of a print statement.
- private-names
- This option warns on each use of any variable, subroutine or method name that lives in a non-current package but begins with an underscore (``_''). Warnings aren't issued for the special case of the single 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 variables $', $& or $' is used. Any occurrence of any of these variables in your program can slow your whole program down. See the perlre manpage 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 program 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.
AUTHOR
Malcolm Beattie, mbeattie@sable.ox.ac.uk.
|
B::Lint - Perl lint |