class SyntaxTree::Index::ParserBackend

supported on all runtimes.
It is not as fast as using the instruction sequences directly, but is
This backend creates the index using the Syntax Tree parser and a visitor.

def index(source) 

def index(source)
  SyntaxTree.parse(source).accept(IndexVisitor.new)
end

def index_file(filepath) 

def index_file(filepath)
  index(SyntaxTree.read(filepath))
end