perlmodlib.pod

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# Generated by perlmodlib.PL  DO NOT EDIT!

=head1 NAME

perlmodlib - constructing new Perl modules and finding existing ones

=head1 DESCRIPTION

=head1 THE PERL MODULE LIBRARY

Many modules are included the Perl distribution.  These are described
below, and all end in F<.pm>.  You may discover compiled library
file (usually ending in F<.so>) or small pieces of modules to be
autoloaded (ending in F<.al>); these were automatically generated
by the installation process.  You may also discover files in the
library directory that end in either F<.pl> or F<.ph>.  These are
old libraries supplied so that old programs that use them still
run.  The F<.pl> files will all eventually be converted into standard
modules, and the F<.ph> files made by B<h2ph> will probably end up
as extension modules made by B<h2xs>.  (Some F<.ph> values may
already be available through the POSIX, Errno, or Fcntl modules.)
The B<pl2pm> file in the distribution may help in your conversion,
but it's just a mechanical process and therefore far from bulletproof.

=head2 Pragmatic Modules

They work somewhat like compiler directives (pragmata) in that they
tend to affect the compilation of your program, and thus will usually
work well only when used within a C<use>, or C<no>.  Most of these
are lexically scoped, so an inner BLOCK may countermand them
by saying:

    no integer;
    no strict 'refs';
    no warnings;

which lasts until the end of that BLOCK.

Some pragmas are lexically scoped--typically those that affect the
C<$^H> hints variable.  Others affect the current package instead,
like C<use vars> and C<use subs>, which allow you to predeclare a
variables or subroutines within a particular I<file> rather than
just a block.  Such declarations are effective for the entire file
for which they were declared.  You cannot rescind them with C<no
vars> or C<no subs>.

The following pragmas are defined (and have their own documentation).

=over 12

=item attributes

Get/set subroutine or variable attributes

=item attrs

Set/get attributes of a subroutine (deprecated)

=item autouse

Postpone load of modules until a function is used

=item base

Establish IS-A relationship with base class at compile time

=item blib

Use MakeMaker's uninstalled version of a package

=item bytes

Force byte semantics rather than character semantics

=item charnames

Define character names for C<\N{named}> string literal escape.

=item constant

Declare constants

=item diagnostics

Perl compiler pragma to force verbose warning diagnostics

=item fields

Compile-time class fields

=item filetest

Control the filetest permission operators

=item integer

Use integer arithmetic instead of floating point

=item less

Request less of something from the compiler

=item lib

Manipulate @INC at compile time

=item locale

Use and avoid POSIX locales for built-in operations

=item open

Set default disciplines for input and output

=item ops

Restrict unsafe operations when compiling

=item overload

Package for overloading perl operations

=item re

Alter regular expression behaviour

=item sigtrap

Enable simple signal handling

=item strict

Restrict unsafe constructs

=item subs

Predeclare sub names

=item utf8

Enable/disable UTF-8 in source code

=item vars

Predeclare global variable names (obsolete)

=item warnings

Control optional warnings

=item warnings::register

Warnings import function

=back

=head2 Standard Modules

Standard, bundled modules are all expected to behave in a well-defined
manner with respect to namespace pollution because they use the
Exporter module.  See their own documentation for details.

=over 12

=item AnyDBM_File

Provide framework for multiple DBMs

=item AutoLoader

Load subroutines only on demand

=item AutoSplit

Split a package for autoloading

=item B

The Perl Compiler

=item B::Asmdata

Autogenerated data about Perl ops, used to generate bytecode

=item B::Assembler

Assemble Perl bytecode

=item B::Bblock

Walk basic blocks

=item B::Bytecode

Perl compiler's bytecode backend

=item B::C

Perl compiler's C backend

=item B::CC

Perl compiler's optimized C translation backend

=item B::Concise

Walk Perl syntax tree, printing concise info about ops

=item B::Debug

Walk Perl syntax tree, printing debug info about ops

=item B::Deparse

Perl compiler backend to produce perl code

=item B::Disassembler

Disassemble Perl bytecode

=item B::Lint

Perl lint

=item B::Showlex

Show lexical variables used in functions or files

=item B::Stackobj

Helper module for CC backend

=item B::Stash

Show what stashes are loaded

=item B::Terse

Walk Perl syntax tree, printing terse info about ops

=item B::Xref

Generates cross reference reports for Perl programs

=item Benchmark

Benchmark running times of Perl code

=item ByteLoader

Load byte compiled perl code

=item CGI

Simple Common Gateway Interface Class

=item CGI::Apache

Backward compatibility module for CGI.pm

=item CGI::Carp

CGI routines for writing to the HTTPD (or other) error log

=item CGI::Cookie

Interface to Netscape Cookies

=item CGI::Fast

CGI Interface for Fast CGI

=item CGI::Pretty

Module to produce nicely formatted HTML code

=item CGI::Push

Simple Interface to Server Push

=item CGI::Switch

Backward compatibility module for defunct CGI::Switch

=item CGI::Util

Internal utilities used by CGI module

=item CPAN

Query, download and build perl modules from CPAN sites

=item CPAN::FirstTime

Utility for CPAN::Config file Initialization

=item CPAN::Nox

Wrapper around CPAN.pm without using any XS module

=item Carp

Warn of errors (from perspective of caller)

=item Carp::Heavy

Carp guts

=item Class::Struct

Declare struct-like datatypes as Perl classes

=item Cwd

Get pathname of current working directory

=item DB

Programmatic interface to the Perl debugging API (draft, subject to

=item DB_File

Perl5 access to Berkeley DB version 1.x

=item Devel::SelfStubber

Generate stubs for a SelfLoading module

=item DirHandle

Supply object methods for directory handles

=item Dumpvalue

Provides screen dump of Perl data.

=item English

Use nice English (or awk) names for ugly punctuation variables

=item Env

Perl module that imports environment variables as scalars or arrays

=item Exporter

Implements default import method for modules

=item Exporter::Heavy

Exporter guts

=item ExtUtils::Command

Utilities to replace common UNIX commands in Makefiles etc.

=item ExtUtils::Embed

Utilities for embedding Perl in C/C++ applications

=item ExtUtils::Install

Install files from here to there

=item ExtUtils::Installed

Inventory management of installed modules

=item ExtUtils::Liblist

Determine libraries to use and how to use them

=item ExtUtils::MM_Cygwin

Methods to override UN*X behaviour in ExtUtils::MakeMaker

=item ExtUtils::MM_OS2

Methods to override UN*X behaviour in ExtUtils::MakeMaker

=item ExtUtils::MM_Unix

Methods used by ExtUtils::MakeMaker

=item ExtUtils::MM_VMS

Methods to override UN*X behaviour in ExtUtils::MakeMaker

=item ExtUtils::MM_Win32

Methods to override UN*X behaviour in ExtUtils::MakeMaker

=item ExtUtils::MakeMaker

Create an extension Makefile

=item ExtUtils::Manifest

Utilities to write and check a MANIFEST file

=item ExtUtils::Mkbootstrap

Make a bootstrap file for use by DynaLoader

=item ExtUtils::Mksymlists

Write linker options files for dynamic extension

=item ExtUtils::Packlist

Manage .packlist files

=item ExtUtils::testlib

Add blib/* directories to @INC

=item Fatal

Replace functions with equivalents which succeed or die

=item Fcntl

Load the C Fcntl.h defines

=item File::Basename

Split a pathname into pieces

=item File::CheckTree

Run many filetest checks on a tree

=item File::Compare

Compare files or filehandles

=item File::Copy

Copy files or filehandles

=item File::DosGlob

DOS like globbing and then some

=item File::Find

Traverse a file tree

=item File::Path

Create or remove directory trees

=item File::Spec

Portably perform operations on file names

=item File::Spec::Epoc

Methods for Epoc file specs

=item File::Spec::Functions

Portably perform operations on file names

=item File::Spec::Mac

File::Spec for MacOS

=item File::Spec::OS2

Methods for OS/2 file specs

=item File::Spec::Unix

Methods used by File::Spec

=item File::Spec::VMS

Methods for VMS file specs

=item File::Spec::Win32

Methods for Win32 file specs

=item File::Temp

Return name and handle of a temporary file safely

=item File::stat

By-name interface to Perl's built-in stat() functions

=item FileCache

Keep more files open than the system permits

=item FileHandle

Supply object methods for filehandles

=item FindBin

Locate directory of original perl script

=item GDBM_File

Perl5 access to the gdbm library.

=item Getopt::Long

Extended processing of command line options

=item Getopt::Std

Process single-character switches with switch clustering

=item I18N::Collate

Compare 8-bit scalar data according to the current locale

=item IO

Load various IO modules

=item IPC::Open2

Open a process for both reading and writing

=item IPC::Open3

Open a process for reading, writing, and error handling

=item Math::BigFloat

Arbitrary length float math package

=item Math::BigInt

Arbitrary size integer math package

=item Math::Complex

Complex numbers and associated mathematical functions

=item Math::Trig

Trigonometric functions

=item Net::Ping

Check a remote host for reachability

=item Net::hostent

By-name interface to Perl's built-in gethost*() functions

=item Net::netent

By-name interface to Perl's built-in getnet*() functions

=item Net::protoent

By-name interface to Perl's built-in getproto*() functions

=item Net::servent

By-name interface to Perl's built-in getserv*() functions

=item O

Generic interface to Perl Compiler backends

=item Opcode

Disable named opcodes when compiling perl code

=item POSIX

Perl interface to IEEE Std 1003.1

=item Pod::Checker

Check pod documents for syntax errors

=item Pod::Find

Find POD documents in directory trees

=item Pod::Html

Module to convert pod files to HTML

=item Pod::InputObjects

Objects representing POD input paragraphs, commands, etc.

=item Pod::LaTeX

Convert Pod data to formatted Latex

=item Pod::Man

Convert POD data to formatted *roff input

=item Pod::ParseUtils

Helpers for POD parsing and conversion

=item Pod::Parser

Base class for creating POD filters and translators

=item Pod::Plainer

Perl extension for converting Pod to old style Pod.

=item Pod::Select

Extract selected sections of POD from input

=item Pod::Text

Convert POD data to formatted ASCII text

=item Pod::Text::Color

Convert POD data to formatted color ASCII text

=item Pod::Text::Overstrike

Convert POD data to formatted overstrike text

=item Pod::Text::Termcap

Convert POD data to ASCII text with format escapes

=item Pod::Usage

Print a usage message from embedded pod documentation

=item SDBM_File

Tied access to sdbm files

=item Safe

Compile and execute code in restricted compartments

=item Search::Dict

Search for key in dictionary file

=item SelectSaver

Save and restore selected file handle

=item SelfLoader

Load functions only on demand

=item Shell

Run shell commands transparently within perl

=item Socket

Load the C socket.h defines and structure manipulators 

=item Symbol

Manipulate Perl symbols and their names

=item Term::ANSIColor

Color screen output using ANSI escape sequences

=item Term::Cap

Perl termcap interface

=item Term::Complete