Class: PatternMatch::PatternSequence

Inherits:
PatternElement show all
Defined in:
lib/pattern-match/core.rb

Defined Under Namespace

Classes: PatternRewind

Instance Attribute Summary

Attributes inherited from Pattern

#next, #parent, #prev

Instance Method Summary collapse

Methods inherited from PatternElement

#quantifier?

Methods inherited from Pattern

#!@, #&, #ancestors, #append, #directly_quantified?, #initialize, #inspect, #quantified?, #quantifier?, #quasibinding, #root, #root?, #to_a, #vars, #|

Methods included from PatternMatch::Pattern::Backtrackable

#choice_points

Constructor Details

This class inherits a constructor from PatternMatch::Pattern

Instance Method Details

#match(vals) ⇒ Object 



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# File 'lib/pattern-match/core.rb', line 341

def match(vals)
  if directly_quantified?
    repeating_match(vals, @next.greedy?) do |rewind|
      if rewind.ntimes < @next.min_k
        next false
      end
      rewind.match(vals)
    end
  else
    with_rewind(make_rewind(1)) do |rewind|
      rewind.match(vals)
    end
  end
end

#validate ⇒ Object

Raises:



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# File 'lib/pattern-match/core.rb', line 356

def validate
  super
  raise MalformedPatternError if subpatterns.empty?
  raise MalformedPatternError unless @parent.kind_of?(HasOrderedSubPatterns)
end