The const pass-by-value

The const pass-by-value


void foo(const int x) {  // not altering x}

Herb Sutter in Exceptional C++, pg.177 says, “const pass-by-value is unuseful and misleading at best.” I disagree, at a glance you know x isn’t going to change throughout the function I feel that’s useful to know. It’s 50/50 amongst people in our office. Where do you stand?

const in pass-by-value is indeed redundant. The function can’t make changes to the original variable anyway, because it has a local copy thereof. Now one can argue that even in that case, the use of const documents the fact that the function doesn’t change its local copy. However, do we really care about this? If you are the implementer of the function, you probably do but you certainly don’t need to document this fact, as it is merely an implementation detail, not a part of the interface. Users of this function certainly don’t care; all they need to know is that the original variable can’t be altered, and the use of pass-by-value, with or without const, already guarantees that. To conclude, the use of const in pass-by-value is an example of over-specification that exposes an implementation detail. In general, exposing implementation details is bad object-oriented programming practice.

Share the Post:
Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular

XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several

data fivetran pricing

Fivetran Pricing Explained

One of the biggest trends of the 21st century is the massive surge in analytics. Analytics is the process of utilizing data to drive future decision-making. With so much of

kubernetes logging

Kubernetes Logging: What You Need to Know

Kubernetes from Google is one of the most popular open-source and free container management solutions made to make managing and deploying applications easier. It has a solid architecture that makes