Method consumeUntil

parser/parser.cc:1599–1611

Override the ANTLR implementation to introduce a token lookahead limit as this prevents pathologically constructed, yet small (< 16kb) inputs from consuming inordinate amounts of compute. This method is only called on error recovery paths.

  //
  // This method is only called on error recovery paths.
  void consumeUntil(Parser* recognizer, const IntervalSet& set) override {
    size_t ttype = recognizer->getInputStream()->LA(1);
    int recovery_search_depth = 0;
    while (ttype != Token::EOF && !set.contains(ttype) &&
           recovery_search_depth++ < recovery_token_lookahead_limit_) {
      recognizer->consume();
      ttype = recognizer->getInputStream()->LA(1);
    }
    // Halt all parsing if the lookahead limit is reached during error recovery.
    if (recovery_search_depth == recovery_token_lookahead_limit_) {
      throw ParseCancellationException("Unable to find a recovery token");
    }
  }

 protected:
  std::string escapeWSAndQuote(const std::string& s) const override {