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Module::Load

Section: Perl Programmers Reference Guide (3pm)
Updated: 2011-06-07
Index

NAME

Module::Load - runtime require of both modules and files

SYNOPSIS

        use Module::Load;    my $module = 'Data:Dumper';    load Data::Dumper;      # loads that module    load 'Data::Dumper';    # ditto    load $module            # tritto        my $script = 'some/script.pl'    load $script;    load 'some/script.pl';      # use quotes because of punctuations        load thing;             # try 'thing' first, then 'thing.pm'    load CGI, ':standard'   # like 'use CGI qw[:standard]'

DESCRIPTION

"load" eliminates the need to know whether you are trying to requireeither a file or a module.

If you consult "perldoc -f require" you will see that "require" willbehave differently when given a bareword or a string.

In the case of a string, "require" assumes you are wanting to load afile. But in the case of a bareword, it assumes you mean a module.

This gives nasty overhead when you are trying to dynamically requiremodules at runtime, since you will need to change the module notation("Acme::Comment") to a file notation fitting the particular platformyou are on.

"load" eliminates the need for this overhead and will just DWYM.

Rules

"load" has the following rules to decide what it thinks you want:

*: If the argument has any characters in it other than those matching"\w", ":" or "'", it must be a file
*: If the argument matches only "[\w:']", it must be a module
*: If the argument matches only "\w", it could either be a module or afile. We will try to find "file" first in @INC and if that fails,we will try to find "file.pm" in @INC.If both fail, we die with the respective error messages.

Caveats

Because of a bug in perl (#19213), at least in version 5.6.1, we haveto hardcode the path separator for a require on Win32 to be "/", likeon Unix rather than the Win32 "\". Otherwise perl will not read itsown %INC accurately double load files if they are required again, orin the worst case, core dump.

"Module::Load" cannot do implicit imports, only explicit imports.(in other words, you always have to specify explicitly what you wishto import from a module, even if the functions are in that modules'@EXPORT)

ACKNOWLEDGEMENTS

Thanks to Jonas B. Nielsen for making explicit imports work.

BUG REPORTS

Please report bugs or other issues to <bug-module-loadAATTrt.cpan.org<gt>.

AUTHOR

This module by Jos Boumans <kaneAATTcpan.org>.

COPYRIGHT

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

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