Our website uses cookies to enhance your browsing experience.
Accept
to the top
close form

Fill out the form in 2 simple steps below:

Your contact information:

Step 1
Congratulations! This is your promo code!

Desired license type:

Step 2
Team license
Enterprise license
** By clicking this button you agree to our Privacy Policy statement
close form
Request our prices
New License
License Renewal
--Select currency--
USD
EUR
* By clicking this button you agree to our Privacy Policy statement

close form
Free PVS‑Studio license for Microsoft MVP specialists
* By clicking this button you agree to our Privacy Policy statement

close form
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

close form
I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

close form
check circle
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.

>
>
>
V016. User annotation was not applied t…
menu mobile close menu
Analyzer diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Micro-Optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
Customer specific requests (C++)
MISRA errors
AUTOSAR errors
OWASP errors (C#)
Problems related to code analyzer
Additional information
toggle menu Contents

V016. User annotation was not applied to a virtual function. To force the annotation, use the 'enable_on_virtual' flag.

Jul 19 2023

The user annotation mechanism can help you additionally configure the diagnostic rules of the analyzer. One of the options for user annotations are function annotations.

Here is an example of such an annotation:

//V_FORMATTED_IO_FUNC, function:Log, format_arg:1, ellipsis_arg:2
void Log(const char *fmt, ...);

However, annotations are not applied to virtual functions by default. The V016 diagnostic warning informs a user that their annotation has not been applied to a virtual function. To fix that, you need to append the following flags to the annotation:

  • 'enable_on_virtual' – applies a user annotation on a virtual function.
  • 'propagate_on_virtual' – extends annotation effects to virtual function overrides in derived classes. In addition, it implicitly applies the 'enable_on_virtual' flag.

For example, the annotation for the 'Log' virtual function of the 'Base' class will look like this:

// The comment should be placed on the same line
//V_FORMATTED_IO_FUNC, function:Base::Log,
                       format_arg:1, ellipsis_arg:2,
                       enable_on_virtual
struct Base
{
  virtual void Log(const char *fmt, ...);
}

The 'propagate_on_virtual' flag can be written instead of 'enable_on_virtual'. Then the annotation will be applied to function overrides in derived classes as well:

// The comment should be located on the same line
//V_FORMATTED_IO_FUNC, function: Base::Log,
                       format_arg:1, ellipsis_arg:2,
                       propagate_on_virtual
struct Base
{
  virtual void Log(const char *fmt, ...);
}

struct Derived
{
  // The annotation will also apply to this function
  virtual void Log(const char *fmt, ...) override;
}