Standard, bundled modules are all expected to behave in a well-defined manner with respect to namespace pollution because they use the Exporter module. Warnings::register - Warnings import function Vmsish - Control VMS-specific language features Version - Perl extension for Version Objects
#INSTALL PERL MODULES CODE#
Utf8 - Enable/disable UTF-8 (or UTF-EBCDIC) in source code Threads::shared - Perl extension for sharing data structures between threads Parent - Establish an ISA relationship with base classes at compile time Overloading - Lexically control overloading Overload - Package for overloading Perl operations
Ops - Restrict unsafe operations when compiling Open - Set default PerlIO layers for input and output Locale - Use or avoid POSIX locales for built-in operations Integer - Use integer arithmetic instead of floating point If - use a Perl module if a condition holds The following pragmas are defined (and have their own documentation).Īttributes - Get/set subroutine or variable attributesĪutodie - Replace functions with ones that succeed or die with lexical scopeĪutodie::exception - Exceptions from autodying functions.Īutodie::exception::system - Exceptions from autodying system().Īutodie::hints - Provide hints about user subroutines to autodieĪutodie::skip - Skip a package when throwing autodie exceptionsĪutouse - Postpone load of modules until a function is usedīase - Establish an ISA relationship with base classes at compile timeīigfloat - Transparent big floating point number support for Perlīigint - Transparent big integer support for Perlīignum - Transparent big number support for Perlīigrat - Transparent big rational number support for Perlīlib - Use MakeMaker's uninstalled version of a packageīuiltin - Import built-in utility functionsīytes - Expose the individual bytes of charactersĬharnames - Access to Unicode character names and named character sequences also define character namesĭeprecate - Perl pragma for deprecating the inclusion of a module in coreĭiagnostics - Produce verbose warning diagnosticsĮncoding - Allows you to write your script in non-ASCII and non-UTF-8Įncoding::warnings - Warn on implicit encoding conversionsĮxperimental - Experimental features made easyįiletest - Control the filetest permission operators You cannot rescind them with no vars or no subs. Such declarations are effective for the entire file for which they were declared. Others affect the current package instead, like use vars and use subs, which allow you to predeclare a variables or subroutines within a particular file rather than just a block. Some pragmas are lexically scoped-typically those that affect the $^H hints variable. Most of these are lexically scoped, so an inner BLOCK may countermand them by saying: no integer 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 use, or no.
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