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.

>
>
>
V3172. The 'if/if-else/for/while/foreac…
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

V3172. The 'if/if-else/for/while/foreach' statement and code block after it are not related. Inspect the program's logic.

Jul 22 2021

The analyzer found a possible error. The 'if/if-else/for/while/foreach' statement and the code block ('{ .... }') after it are not related.

Consider a synthetic example:

if (a == 1) DoSmt();
{
  DoSmt2();
}

At first glance, the block seems to be executed if the condition is true, in fact, it is not so. The block is always executed, regardless of the condition. This may mislead the programmer.

Let's consider other code examples that trigger the analyzer:

if (a == 2) Nop(); else Nop2();
{
  Nop3();
}

if (a == 3) Nop(); 
else Nop2();
{
  Nop3();
}

foreach (var item in query) DoSmt1();
{
  DoSmt2();
}

The analyzer does not issue a warning if the lines with the statement and the unrelated code block are non-contiguous:

if (a == 7) DoSmt();
// this is a block for initializing MyClass fields
{
  ....
}

If you get such a warning, and it is false, you can tell the analyzer about it by adding an empty line between the statement and the block.

Also, the diagnostic does not issue a warning if the statement body is empty (';'). The diagnostic rule V3007 is responsible for this.

if (a == 3) ;
{
  DoSmt();
}

This diagnostic is classified as: