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PPI::Statement::Include(3)           User Contributed Perl Documentation          PPI::Statement::Include(3)



NAME
       PPI::Statement::Include - Statements that include other code

SYNOPSIS
         # The following are all includes
         use 5.006;
         use strict;
         use My::Module;
         use constant FOO => 'Foo';
         require Foo::Bar;
         require "Foo/Bar.pm";
         require $foo if 1;
         no strict 'refs';

INHERITANCE
         PPI::Statement::Include
         isa PPI::Statement
             isa PPI::Node
                 isa PPI::Element

DESCRIPTION
       Despite its name, the "PPI::Statement::Include" class covers a number of different types of statement
       that cover all statements starting with "use", "no" and "require".

       But basically, they cover three situations.

       Firstly, a dependency on a particular version of perl (for which the "version" method returns true),
       a pragma (for which the "pragma" method returns true, or the loading (and unloading via no) of
       modules.

METHODS
       "PPI::Statement::Include" has a number of methods in addition to the standard PPI::Statement,
       PPI::Node and PPI::Element methods.

   type
       The "type" method returns the general type of statement ('use', 'no' or 'require').

       Returns the type as a string, or "undef" if the type cannot be detected.

   module
       The "module" method returns the module name specified in any include statement. This "includes"
       pragma names, because pragma are implemented as modules. (And lets face it, the definition of a
       pragma can be fuzzy at the best of times in any case)

       This covers all of these...

         use strict;
         use My::Module;
         no strict;
         require My::Module;

       ...but does not cover any of these...

         use 5.006;
         require 5.005;
         require "explicit/file/name.pl";

       Returns the module name as a string, or "undef" if the include does not specify a module name.

   module_version
       The "module_version" method returns the minimum version of the module required by the statement, if
       there is one.

   pragma
       The "pragma" method checks for an include statement's use as a pragma, and returns it if so.

       Or at least, it claims to. In practice it's a lot harder to say exactly what is or isn't a pragma,
       because the definition is fuzzy.

       The "intent" of a pragma is to modify the way in which the parser works.  This is done though the use
       of modules that do various types of internals magic.

       For now, PPI assumes that any "module name" that is only a set of lowercase letters (and perhaps
       numbers, like "use utf8;"). This behaviour is expected to change, most likely to something that knows
       the specific names of the various "pragmas".

       Returns the name of the pragma, or false ('') if the include is not a pragma.

   version
       The "version" method checks for an include statement that introduces a dependency on the version of
       "perl" the code is compatible with.

       This covers two specific statements.

         use 5.006;
         require 5.006;

       Currently the version is returned as a string, although in future the version may be returned as a
       version object.  If you want a numeric representation, use "version_literal()".  Returns false if the
       statement is not a version dependency.

   version_literal
       The "version_literal" method has the same behavior as "version()", but the version is returned as a
       numeric literal.  Returns false if the statement is not a version dependency.

       The "arguments" method gives you the rest of the statement after the the module/pragma and module
       version, i.e. the stuff that will be used to construct what gets passed to the module's "import()"
       subroutine.  This does include the comma, etc. operators, but doesn't include non-significant direct
       children or any final semicolon.

TO DO
       - Write specific unit tests for this package

SUPPORT
       See the support section in the main module.

AUTHOR
       Adam Kennedy <adamk@cpan.org>

COPYRIGHT
       Copyright 2001 - 2011 Adam Kennedy.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl
       itself.

       The full text of the license can be found in the LICENSE file included with this module.



perl v5.16.2                                     2011-02-25                       PPI::Statement::Include(3)