B::Lint - Perl

Lint

Provides program checking for Perl programs, equivalent to running Perl with the -w option. Named after the Unix lint program for checking C programs. Invoked as:

perl -MO=Lint[,options] program

program is the name of the Perl program to be checked. The options are separated by commas and follow normal backend option conventions. Most of the options are lint-check options, where each option is a word specifying one lint check. Preceding an option with no- turns off that option. Options specified later override earlier options. There is also one non-lint-check option, -u. Here is the list of available options:

all
Turns all warnings on.
context
Warns whenever an array is used in implicit scalar context.
dollar-underscore
Warns whenever $_ is explicitly used anywhere or whenever it is used as the implicit argument of a print statement.
implicit-read
Warns whenever an operation implicitly reads a Perl special variable.
implicit-write
Warns whenever an operation implicitly writes to a Perl special variable.
none
Turns off all warnings.
private-names
Warns whenever any variable, subroutine, or method name lives in a non-current package but begins with an underscore (_); doesn't warn about an underscore as a single-character name, e.g., $_.
regexp-variables
Warns whenever one of the regular-expression variables $', $&, or $` is used.
-u Package
Normally checks only the main program code and all subroutines defined in package main; -u lets you specify other packages to be checked.
undefined-subs
Warns whenever an undefined subroutine is invoked.