class Rouge::Lexers::IO

def self.builtins
  @builtins ||= Set.new %w(
    args call clone do doFile doString else elseif for if list
    method return super then
  )
end

def self.constants
  @constants ||= Set.new %w(nil false true)
end

def self.detect?(text)
  return true if text.shebang? 'io'
end