progs/app7.scala
author Christian Urban <christian dot urban at kcl dot ac dot uk>
Sat, 13 Sep 2014 04:30:25 +0100
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abstract class Parser[I, T] {
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  def parse(ts: I): Set[(T, I)]
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  def parse_all(ts: I) : Set[T] =
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    for ((head, tail) <- parse(ts); if (tail.isEmpty)) 
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      yield head
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}
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