The ruby18_source_location gem backports the source_location instance method of Method, UnboundMethod and Proc from Ruby 1.9.

This allows you to use Method#source_location on ruby 1.8.7, and also all the other gems that depend on it.

gem install ruby18_source_location

    require 'rubygems'
    require 'ruby18_source_location'

    def example
      2
    end

    puts method(:example).source_location.inspect
    # => ["/tmp/example.rb", 4]

    puts Proc.new{}.source_location.inspect
    # => ["/tmp/example.rb", 11]

    puts method(:puts).source_location.inspect
    # => nil

Under Ruby-1.8.7, it's not currently possible to get the source_location of methods defined by attr_reader, attr_writer or attr_accessor, unless you are running Ruby Enterprise Edition.

This is made available under the MIT license (see LICENSE.MIT), contributions and bug reports are welcome.