dcsimg
Login | Register   
LinkedIn
Google+
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Intermediate
Jan 18, 2000

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


The this Pointer

In the body of a non-static member function, the keyword this is a non-lvalue expression whose value is the address of the object for which the function is called. However, in pre-standard C++, this was actually a pointer. Although the difference between a real pointer and a "non-lvalue expression whose value is the address of the object" may seem like hair-splitting, the distinction between the two is important because the new definition guarantees that programmers can't change the value of this because it's not an l-value. In other words, you can think of this as a function returning the address of its object, rather than the pointer itself. Assigning to this was a valid programming practice in the preliminary stages of C++; nowadays, it's both illegal and impossible due to the new definition.
Danny Kalev
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date