Module: MethodSource::MethodExtensions

Included in:
Method, Proc, UnboundMethod
Defined in:
lib/method_source.rb

Overview

This module is to be included by Method and UnboundMethod and provides the #source functionality

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(klass) ⇒ Object

We use the included hook to patch Method#source on rubinius. We need to use the included hook as Rubinius defines a source on Method so including a module will have no effect (as it's higher up the MRO).



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# File 'lib/method_source.rb', line 87

def self.included(klass)
  if klass.method_defined?(:source) && Object.const_defined?(:RUBY_ENGINE) &&
      RUBY_ENGINE =~ /rbx/

    klass.class_eval do
      orig_source = instance_method(:source)

      define_method(:source) do
        begin
          super
        rescue
          orig_source.bind(self).call
        end
      end

    end
  end
end

Instance Method Details

#commentString

Return the comments associated with the method as a string. (This functionality is only supported in Ruby 1.9 and above)

Examples:

Set.instance_method(:clear).comment.display
=>
   # Removes all elements and returns self.


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# File 'lib/method_source.rb', line 135

def comment
  if respond_to?(:source_location)
    comment = MethodSource.comment_helper(source_location)

    raise "Cannot locate source for this method: #{name}" if !comment
  else
    raise "#{self.class}#comment not supported by this Ruby version (#{RUBY_VERSION})"
  end

  comment
end

#sourceString

Return the sourcecode for the method as a string (This functionality is only supported in Ruby 1.9 and above)

Examples:

Set.instance_method(:clear).source.display
=>
   def clear
     @hash.clear
     self
   end


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# File 'lib/method_source.rb', line 116

def source
  if respond_to?(:source_location)
    source = MethodSource.source_helper(source_location)

    raise "Cannot locate source for this method: #{name}" if !source
  else
    raise "#{self.class}#source not supported by this Ruby version (#{RUBY_VERSION})"
  end

  source
end