Class: Opal::AST::Matcher::Node

Inherits:
Struct
  • Object
show all
Defined in:
opal/lib/opal/ast/matcher.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#children ⇒ Object

Returns the value of attribute children

Returns:

  • (Object) —

    the current value of children



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# File 'opal/lib/opal/ast/matcher.rb', line 33

def children
  @children
end

#type ⇒ Object

Returns the value of attribute type

Returns:

  • (Object) —

    the current value of type



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# File 'opal/lib/opal/ast/matcher.rb', line 33

def type
  @type
end

Instance Method Details

#inspect ⇒ Object 



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# File 'opal/lib/opal/ast/matcher.rb', line 67

def inspect
  if type == :capture
    "{#{children.first.inspect}}"
  else
    "s(#{type.inspect}, #{children.inspect[1..-2]})"
  end
end

#match(ast, matcher) ⇒ Object 



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# File 'opal/lib/opal/ast/matcher.rb', line 34

def match(ast, matcher)
  return false if ast.nil?

  ast_parts = [ast.type] + ast.children
  self_parts = [type] + children

  return false if ast_parts.length != self_parts.length

  ast_parts.length.times.all? do |i|
    ast_elem = ast_parts[i]
    self_elem = self_parts[i]

    if self_elem.is_a?(Node) && self_elem.type == :capture
      capture = true
      self_elem = self_elem.children.first
    end

    res = case self_elem
          when Node
            self_elem.match(ast_elem, matcher)
          when Array
            self_elem.include?(ast_elem)
          when :*
            true
          else
            self_elem == ast_elem
          end

    matcher.captures << ast_elem if capture
    res
  end
end