# File lib/rake.rb, line 1903
1903:     def top_level
1904:       standard_exception_handling do
1905:         if options.show_tasks
1906:           display_tasks_and_comments
1907:         elsif options.show_prereqs
1908:           display_prerequisites
1909:         else
1910:           top_level_tasks.each { |task_name| invoke_task(task_name) }
1911:         end
1912:       end
1913:     end