Module: Wool::SexpAnalysis::Visitor

Included in:
ScopeAnnotation::Annotator
Defined in:
lib/wool/analysis/visitor.rb

Overview

Visitor: a set of methods for visiting an AST. The default implementations visit each child and do no other processing. By including this module, and implementing certain methods, you can do your own processing on, say, every instance of a :rescue AST node. The default implementation will go arbitrarily deep in the AST tree until it hits a method you define.

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(meth, *args, &blk) ⇒ Object 



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# File 'lib/wool/analysis/visitor.rb', line 27

def method_missing(meth, *args, &blk)
  if meth.to_s[0,6] == 'visit_'
    default_visit args.first
  else
    raise
  end
end

Instance Method Details

#default_visit(node) ⇒ Object 



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# File 'lib/wool/analysis/visitor.rb', line 23

def default_visit(node)
  node.children.select {|x| Sexp === x}.each {|x| visit(x) }
end

#visit(node) ⇒ Object 



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# File 'lib/wool/analysis/visitor.rb', line 11

def visit(node)
  case node
  when Sexp
    case node[0]
    when ::Symbol
      send("visit_#{node[0]}", node)
    when Array
      node.each {|x| visit(x)}
    end
  end
end