Method: Parser::Source::TreeRewriter#import!

Defined in:
lib/parser/source/tree_rewriter.rb

#import!(foreign_rewriter, offset: 0) ⇒ Rewriter

For special cases where one needs to merge a rewriter attached to a different source_buffer or that needs to be offset. Policies of the receiver are used.

Parameters:

  • rewriter (TreeRewriter) —

    from different source_buffer

  • offset (Integer) (defaults to: 0)

Returns:

Raises:

  • (IndexError) —

    if action ranges (once offset) don't fit the current buffer


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# File 'lib/parser/source/tree_rewriter.rb', line 168

def import!(foreign_rewriter, offset: 0)
  return self if foreign_rewriter.empty?

  contracted = foreign_rewriter.action_root.contract
  merge_effective_range = ::Parser::Source::Range.new(
    @source_buffer,
    contracted.range.begin_pos + offset,
    contracted.range.end_pos + offset,
  )
  check_range_validity(merge_effective_range)

  merge_with = contracted.moved(@source_buffer, offset)

  @action_root = @action_root.combine(merge_with)
  self
end