# File lib/rspec/core/metadata.rb, line 8
        def [](key)
          return super if has_key?(key)
          case key
          when :location
            store(:location, location)
          when :file_path, :line_number
            file_path, line_number = file_and_line_number
            store(:file_path, file_path)
            store(:line_number, line_number)
            super
          when :execution_result
            store(:execution_result, {})
          when :describes
            store(:describes, described_class_for(self))
          when :full_description
            store(:full_description, full_description_for(self))
          when :description
            store(:description, build_description_from(*self[:description_args]))
          else
            super
          end
        end