Conservative ambiguity detection in context-free grammars

  • Authors:
  • Sylvain Schmitz

  • Affiliations:
  • Laboratoire I3S, Université de Nice - Sophia Antipolis & CNRS, France

  • Venue:
  • ICALP'07 Proceedings of the 34th international conference on Automata, Languages and Programming
  • Year:
  • 2007

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Abstract

The ability to detect ambiguities in context-free grammars is vital for their use in several fields, but the problem is undecidable in the general case. We present a safe, conservative approach, where the approximations cannot result in overlooked ambiguous cases. We analyze the complexity of the verification, and provide formal comparisons with several other ambiguity detection methods.