Method sum

basex-core/src/main/java/org/basex/query/var/VarUsage.java:52–59

Checks how often a variable or context reference is accessed in all given expressions. @param var variable (Var reference) or context (null) to inline @param exprs expressions @return number of accesses to the variable in all expressions combined

(final Var var, final Expr... exprs)

   * @return number of accesses to the variable in all expressions combined
   */
  public static VarUsage sum(final Var var, final Expr... exprs) {
    VarUsage uses = NEVER;
    for(final Expr expr : exprs) {
      uses = uses.plus(expr.count(var));
      if(uses == MORE_THAN_ONCE) break;
    }
    return uses;
  }

  /**
   * Checks how often a variable or context reference is used in any of the given expressions.