# File lib/rake.rb, line 1630 1630: def [](task_name, scopes=nil) 1631: task_name = task_name.to_s 1632: self.lookup(task_name, scopes) or 1633: enhance_with_matching_rule(task_name) or 1634: synthesize_file_task(task_name) or 1635: fail "Don't know how to build task '#{task_name}'" 1636: end