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B::Lint (3)
>> B::Lint (3) ( Разные man: Библиотечные вызовы )
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 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 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) { ... }
bare-subs
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:
Neither of these will do what a naive user would expect.
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 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 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.
This module doesn't work correctly on thread-enabled perls.
