class RuboCop::AST::Builder

`RuboCop::Builder` is an AST builder that is utilized to let `Parser` generate ASTs with {RuboCop::AST::Node}.

@example

buffer = Parser::Source::Buffer.new('(string)')
buffer.source = 'puts :foo'

builder = RuboCop::Builder.new
parser = Parser::CurrentRuby.new(builder)
root_node = parser.parse(buffer)

Constants

NODE_MAP

Public Instance Methods

n(type, children, source_map) click to toggle source

Generates {Node} from the given information.

@return [Node] the generated node

# File lib/rubocop/ast/builder.rb, line 43
def n(type, children, source_map)
  node_klass(type).new(type, children, location: source_map)
end
string_value(token) click to toggle source

TODO: Figure out what to do about literal encoding handling… More details here github.com/whitequark/parser/issues/283

# File lib/rubocop/ast/builder.rb, line 49
def string_value(token)
  value(token)
end

Private Instance Methods

node_klass(type) click to toggle source
# File lib/rubocop/ast/builder.rb, line 55
def node_klass(type)
  node_map[type] || Node
end
node_map() click to toggle source

Take the human readable constant and generate a hash map where each (mapped) node type is a key with its constant as the value.

# File lib/rubocop/ast/builder.rb, line 61
def node_map
  @node_map ||= begin
    NODE_MAP.each_pair.each_with_object({}) do |(klass, types), map|
      types.each { |type| map[type] = klass }
    end
  end
end