method_source
=============

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(C) John Mair (banisterfiend) 2011

_retrieve the sourcecode for a method_

*NOTE:* This simply utilizes `Method#source_location`; it
 does not access the live AST.

`method_source` is a utility to return a method's sourcecode as a
Ruby string. Also returns `Proc` and `Lambda` sourcecode.

Method comments can also be extracted using the `comment` method.

It is written in pure Ruby (no C).

* Some Ruby 1.8 support now available.
* Support for MRI, RBX, JRuby, REE

`method_source` provides the `source` and `comment` methods to the `Method` and
`UnboundMethod` and `Proc` classes.

* Install the [gem](https://rubygems.org/gems/method_source): `gem install method_source`
* Read the [documentation](https://www.rubydoc.info/github/banister/method_source/master)
* See the [source code](http://github.com/banister/method_source)

Example: display method source
------------------------------

    Set.instance_method(:merge).source.display
    # =>
    def merge(enum)
      if enum.instance_of?(self.class)
        @hash.update(enum.instance_variable_get(:@hash))
      else
        do_with_enum(enum) { |o| add(o) }
      end

      self
    end

Example: display method comments
--------------------------------

    Set.instance_method(:merge).comment.display
    # =>
    # Merges the elements of the given enumerable object to the set and
    # returns self.

Example: display module/class comments
--------------------------------------

    MethodSource::MethodExtensions.method(:included).module_comment
    # =>
    # This module is to be included by `Method` and `UnboundMethod` and
    # provides the `#source` functionality

Limitations:
------------

* Occasional strange behaviour in Ruby 1.8
* Cannot return source for C methods.
* Cannot return source for dynamically defined methods.

Special Thanks
--------------

[Adam Sanderson](https://github.com/adamsanderson) for `comment` functionality.

[Dmitry Elastic](https://github.com/dmitryelastic) for the brilliant Ruby 1.8 `source_location` hack.

[Samuel Kadolph](https://github.com/samuelkadolph) for the JRuby 1.8 `source_location`.

License
-------

(The MIT License)

Copyright (c) 2011 John Mair (banisterfiend)

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
