Module: Dhall::Operator::FetchFromMerge

Included in:
RecursiveRecordMerge, RightBiasedRecordMerge
Defined in:
lib/dhall/ast.rb

Instance Method Summary collapse

Instance Method Details

#fetch(selector) ⇒ Object 



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# File 'lib/dhall/ast.rb', line 368

def fetch(selector)
  first = public_send(self.class::FETCH1K)
  second = public_send(self.class::FETCH2K)
  if first.is_a?(Record)
    first.fetch(selector) { second.fetch(selector) }
  elsif second.is_a?(Record)
    fetch_second_record(first, second, selector)
  else
    super
  end
end

#fetch_second_record(first, second, selector) ⇒ Object 



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# File 'lib/dhall/ast.rb', line 355

def fetch_second_record(first, second, selector)
  rec = self.class.new(
    self.class::FETCH2K => second.slice(selector),
    self.class::FETCH1K => first
  ).normalize

  if rec.class == self.class
    RecordSelection.new(record: rec, selector: selector)
  else
    rec.fetch(selector)
  end
end