# File lib/rake.rb, line 1445 1445: def [](task_name, scopes=nil) 1446: task_name = task_name.to_s 1447: self.lookup(task_name, scopes) or 1448: enhance_with_matching_rule(task_name) or 1449: synthesize_file_task(task_name) or 1450: fail "Don't know how to build task '#{task_name}'" 1451: end