class RuboCop::AST::NodePattern::Compiler::Subcompiler

/docs/modules/ROOT/pages/node_pattern.adoc
Doc on how this fits in the compiling process:
Implements visitor pattern
Base class for subcompilers

def compile(node)
  prev = @node
  @node = node
  do_compile
ensure
  @node = prev
end

def do_compile
  send(self.class.registry.fetch(node.type, :visit_other_type))
end

def inherited(base)
  us = self
  base.class_eval { @registry = us.registry.dup }
  super
end

def initialize(compiler)
  @compiler = compiler
  @node = nil
end

def method_added(method)
  @registry[Regexp.last_match(1).to_sym] = method if method =~ /^visit_(.*)/
  super
end

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