Module: PatternMatch::Pattern::Backtrackable

Included in:
PatternMatch::Pattern
Defined in:
lib/pattern-match/experimental.rb

Instance Method Summary collapse

Instance Method Details

#choice_points ⇒ Object 



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# File 'lib/pattern-match/experimental.rb', line 18

def choice_points
  if root?
    @choice_points ||= []
  else
    @parent.choice_points
  end
end

#match(vals) ⇒ Object 



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# File 'lib/pattern-match/experimental.rb', line 10

def match(vals)
  matched = super
  if root? and not matched and not choice_points.empty?
    restore_choice_point
  end
  matched
end