Class: orgorg::jrubyparserorg::jrubyparser::ast::Node

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/jruby-parser/core_ext/node.rb

Instance Method Summary collapse

Instance Method Details

#[](value) ⇒ Object

Find nth child element of this node



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# File 'lib/jruby-parser/core_ext/node.rb', line 9

def [](value)
  child_nodes[value]
end

#[]=(index, value) ⇒ Object

Replace the nth child element of this node with the specified value. if the value is an actual Ruby value it will attempt to call to_ast_node on it to do automatic coercion to an AST node. If the node does not contain positioning information then it will just use the old nodes information



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# File 'lib/jruby-parser/core_ext/node.rb', line 19

def []=(index, value)
  value = value.to_ast_node if value.respond_to? :to_ast_node

  old_value = child_nodes[index]
  value.position = old_value.position unless value.position
  child_nodes[index] = value
end

#each {|_self| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/jruby-parser/core_ext/node.rb', line 48

def each(&block)
  yield self
  child_nodes.each { |child| child.each(&block) }
end

#find_type(name, &block) ⇒ Object Also known as: find_node

Find first node by name (which is short_name of actual node)

parameters

  • name is the name of the class you want to find

examples

root.find(:fcall) # Find first child node of type fcall (depth-first)



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# File 'lib/jruby-parser/core_ext/node.rb', line 35

def find_type(name, &block)
  name = name.to_s
  return self if name == short_name && (!block_given? || yield(self))

  child_nodes.each do |child|
    value = child.find_type(name, &block)

    return value if value
  end
  nil
end

#short_name ⇒ Object 



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# File 'lib/jruby-parser/core_ext/node.rb', line 63

def short_name
  java_class.name.gsub(/(^.*\.|Node$)/, '').downcase
end

#to_source(opts = {}) ⇒ Object

Convert this node back to human-readable source code.



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# File 'lib/jruby-parser/core_ext/node.rb', line 56

def to_source(opts = {})
  filename = opts[:filename] ? opts[:filename] : '(string)'
  java.io.StringWriter.new.tap do |writer|
    accept org.jrubyparser.rewriter.ReWriteVisitor.new(writer, filename)
  end.to_s
end