Module: MethodSource::SourceLocation::UnboundMethodExtensions

Included in:
UnboundMethod
Defined in:
lib/method_source/source_location.rb

Instance Method Summary collapse

Instance Method Details

#source_location ⇒ Array

Return the source location of an instance method for Ruby 1.8.

Returns:

  • (Array) —

    A two element array. First element is the file, second element is the line in the file where the method definition is found.



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# File 'lib/method_source/source_location.rb', line 38

def source_location
  klass = case owner
          when Class
            owner
          when Module
            method_owner = owner
            Class.new { include(method_owner) }
          end

  # deal with immediate values
  case
  when klass == Symbol
    return :a.method(name).source_location
  when klass == Fixnum
    return 0.method(name).source_location
  when klass == TrueClass
    return true.method(name).source_location
  when klass == FalseClass
    return false.method(name).source_location
  when klass == NilClass
    return nil.method(name).source_location
  end
  
  begin
    klass.allocate.method(name).source_location
  rescue TypeError

    # Assume we are dealing with a Singleton Class:
    # 1. Get the instance object
    # 2. Forward the source_location lookup to the instance
    instance ||= ObjectSpace.each_object(owner).first
    instance.method(name).source_location
  end
end