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This module is a better way of putting 'hello there' trace messages in your code. It lets you turn tracing on and off without commenting out trace statements, and provides other useful things like HTML-ified trace messages for CGI scripts and an easy way to trace out data structures using Data::Dumper. Seamus Venasse <svenasse@polaris.ca>

Meta::Builder is designed to be a generic tool for writing Meta objects. Unlike specialized tools, Meta::Builder makes no assumptions about what metrics you will care about. Meta::Builder also mkaes it simple for others to extend your meta-object based tools by providing hooks for other packages to add metrics to your meta object.

When testing applications, often you find yourself needing to provide functionality in your test environment that would usually be provided by external modules. Rather than munging the %INC by hand to mark these external modules as loaded, so they are not attempted to be loaded by perl, this module offers you a very simple way to mark modules as loaded and/or unloaded.

This module marries App::Cmd with MooseX::Getopt. Use it like App::Cmd advises (especially see App::Cmd::Tutorial), swapping App::Cmd::Command for MooseX::App::Cmd::Command. Then you can write your moose commands as moose classes, with MooseX::Getopt defining the options for you instead of opt_spec returning a Getopt::Long::Descriptive spec.

MooseX::AuthorizedMethods exports the "authorized" declarator that makes a verification if the user has the required permissions before the acual invocation. The default verification method will take the "user" method result and call "roles" to list the roles given to that user.

The module MooseX::HasDefaults::RO defaults is to ro. The module MooseX::HasDefaults::RW defaults is to rw. If you pass a specific value to any has's is, that overrides the default. If you do not want an accessor, pass is => undef.

Moose type constraints are expected to return true if the value passes the constraint, and false otherwise; Moo "constraints", on the other hand, die if validation fails. This metaclass allows for Moo-style constraints; it will wrap them and translate their Moo into a dialect Moose understands.

This module is meant to be loaded as a role from Moose-based classes it will add five methods and four attributes to assist you with the loading and handling of plugins and extensions for plugins. I understand that this may pollute your namespace, however I took great care in using the least ambiguous names possible.

The 'SetOnce' attribute lets your class have attributes that are not lazy and not set, but that cannot be altered once set. If you try to alter the value of an attribute with the SetOnce trait, either by accessor or writer, and the attribute has a value, it will throw an exception.

Perl's filehandles are implemented as a stack of layers, with the bottom-most usually doing the actual IO and the higher ones doing buffering, encoding/decoding or transformations. PerlIO::Layers allows you to query the filehandle's properties concerning there layers.