Method: ANTLR3::Rewrite::RewriteProgram#execute

Defined in:

lib/antlr3/streams/rewrite.rb

#execute(*range_arguments) ⇒ Object

# File 'lib/antlr3/streams/rewrite.rb', line 264

def execute( *range_arguments )
  if range_arguments.empty?
    range = 0 ... @stream.length
  else
    range, = cast_range( range_arguments )
  end
  
  output = ''
  
  tokens = @stream.tokens
  
  operations = reduce
  
  cursor = range.first
  while range.include?( cursor )
    if operation = operations.delete( cursor )
      cursor = operation.execute( output )
    else
      token = tokens[ cursor ]
      output << token.text if token
      cursor += 1
    end
  end
  if operation = operations.delete( cursor ) and
     operation.is_a?( InsertBefore )
    # catch edge 'insert-after' operations
    operation.execute( output )
  end
  
  return output
end