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Short Circuit Evaluation in C : Is It as Reliable as in Java?

Susan Sarandon

Nov 10, 2024 am 04:41 AM

Short Circuit Evaluation in C : Is It as Reliable as in Java?

Short Circuit Evaluation in C : Is It as Guaranteed as in Java?

In Java, the short-circuit evaluation mechanism ensures that expressions are evaluated sequentially from left to right, stopping as soon as a false value is encountered. This behavior enables efficient use of conditions, such as:

if (a != null && a.fun());

Can C Offer the Same Guarantee?

In C , short-circuit evaluation is also employed for built-in data types and operators. However, the guarantee differs from Java.

if (a != 0 && a->fun());

Here, a != 0 evaluates to either true or false, and only if it evaluates to true, is a->fun() executed. This guaranteed behavior applies only to built-in types.

Overloading & and || in C

Custom types in C can overload the && and || operators. When this occurs, the short-circuited evaluation is not guaranteed. As a result, overloading these operators for custom types is generally discouraged.

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