Class: Metamorpher::Visitable::Visitor

Inherits:

Object

• Object
• Metamorpher::Visitable::Visitor

Defined in:

lib/metamorpher/visitable/visitor.rb

Direct Known Subclasses

Builders::Ruby::VariableReplacementVisitor, Matcher::MatchingVisitor, Rewriter::SubstitutionVisitor

Instance Method Summary

• #visit(thing) ⇒ Object

  This method will examine the class and ancestors of thing.

Instance Method Details

#visit(thing) ⇒ Object

This method will examine the class and ancestors of thing. For each class in the “ancestors” list, it will check to see if the visitor knows how to handle that particular class. If it can’t find a handler for the thing it will raise an exception.

# File 'lib/metamorpher/visitable/visitor.rb', line 11

def visit(thing)
  thing.class.ancestors.each do |ancestor|
    method_name = :"visit_#{ancestor.name.split("::").last.downcase}"
    return send(method_name, thing) if respond_to?(method_name)
  end

  fail ArgumentError, "Can't visit #{thing.class}"
end