(C) John Mair (banisterfiend) 2010

retrieve the sourcecode for a method

NOTE: This is nothing fancy; it simply utilizes Method#source_location in Ruby 1.9

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

It is written in pure Ruby (no C).

method_source provides the source method to the Method and UnboundMethod and Proc classes.

• Install the gem: gem install method_source
• Read the documentation
• See the source code

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

• Only works with Ruby 1.9+ (YARV)
• Cannot return source for C methods.
• Cannot return source for dynamically defined methods.

• Combine with RubyParser for extra fun.