Method unary

basex-core/src/main/java/org/basex/query/QueryParser.java:2066–2079

Parses the "UnaryExpr" rule. @return query expression or null @throws QueryException query exception

()

   * @throws QueryException query exception
   */
  private Expr unary() throws QueryException {
    boolean minus = false, found = false;
    while(true) {
      skipWs();
      if(next() != '>' && consume('-')) {
        minus ^= true;
      } else if(consume('+')) {
      } else {
        final Expr expr = value();
        return found ? new Unary(info(), check(expr, EVALUNARY), minus) : expr;
      }
      found = true;
    }
  }

  /**
   * Parses the "ValueExpr" rule.