To get a trial key
fill out the form below
Team License (standard version)
Enterprise License (extended version)
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Request our prices
New License
License Renewal
--Select currency--
USD
EUR
GBP
RUB
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Message submitted.

Your message has been sent. We will email you at


If you haven't received our response, please do the following:
check your Spam/Junk folder and click the "Not Spam" button for our message.
This way, you won't miss messages from our team in the future.

>
>
>
V822. Decreased performance. A new obje…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
Additional information
Contents

V822. Decreased performance. A new object is created, while a reference to an object is expected.

Nov 07 2019

The analyzer has detected an issue where a new object is created instead of a reference to an already existing object. The creation of an unnecessary object takes up some amount of time and memory.

Consider the following example, where a variable is cast to a reference in the right part of the expression while it is not declared as a reference in the left part:

auto test = static_cast<NotPOD &>(npod);

The right part of this expression contains a cast to a reference of type NotPOD, but no such cast is found in the left part. This results in copying the object instead of passing it by reference.

There are two ways to fix this code. The first is to replace auto with decltype(auto):

decltype(auto) test = static_cast<NotPOD &>(npod);

The '&' qualifier will now be deduced according to the right part, but this solution is too lengthy, so it would be better to just add the qualifier manually:

auto &test = static_cast<NotPOD &>(npod);

If you really wanted the object to be copied, you should remove the qualifier from the right part to make the code easier to read:

auto test = static_cast<NotPOD>(npod);
This website uses cookies and other technology to provide you a more personalized experience. By continuing the view of our web-pages you accept the terms of using these files. If you don't want your personal data to be processed, please, leave this site.
Learn More →
Accept