parseEditDistance static method

QueryParserState? parseEditDistance(QueryParser parser)

Implementation

static QueryParserState? parseEditDistance(QueryParser parser) {
  var lexeme = parser.consumeLexeme();

  if (lexeme == null) {
    return null;
  }

  var editDistance = int.tryParse(lexeme.str, radix: 10);

  if (editDistance == null) {
    var errorMessage = "edit distance must be numeric";
    throw QueryParseError(errorMessage, lexeme.start, lexeme.end);
  }

  parser.currentClause.editDistance = editDistance;

  var nextLexeme = parser.peekLexeme();

  if (nextLexeme == null) {
    parser.nextClause();
    return null;
  }

  switch (nextLexeme.type) {
    case LexemeType.TERM:
      parser.nextClause();
      return QueryParser.parseTerm;
    case LexemeType.FIELD:
      parser.nextClause();
      return QueryParser.parseField;
    case LexemeType.EDIT_DISTANCE:
      return QueryParser.parseEditDistance;
    case LexemeType.BOOST:
      return QueryParser.parseBoost;
    case LexemeType.PRESENCE:
      parser.nextClause();
      return QueryParser.parsePresence;
    default:
      var errorMessage = "Unexpected lexeme type '${nextLexeme.type}'";
      throw QueryParseError(errorMessage, nextLexeme.start, nextLexeme.end);
  }
}