to the top
close form
To get a trial key
fill out the form below
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.

>
>
>
V770. Possible use of left shift operat…
menu mobile close menu
Analyzer diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of 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

V770. Possible use of left shift operator instead of comparison operator.

Oct 20 2016

The analyzer detected a potential typo that deals with using operators '<<' and '<<=' instead of '<' and '<=', respectively, in a loop condition.

Consider the following example:

void Foo(std::vector<int> vec)
{
  for (size_t i = 0; i << vec.size(); i++) // <=
  {
    // Something
  }
}

The "i << vec.size()" expression evaluates to zero, which is obviously an error because the loop body will not execute even once. Fixed code:

void Foo(std::vector<int> vec)
{
  for (size_t i = 0; i < vec.size(); i++) 
  {
    // Something
  }
}

Note. Using right-shift operations (>>, >>=) is considered a normal situation, as they are used in various algorithms, for example computing the number of bits with the value 1, for example:

size_t num;
unsigned short var = N;
for (num = var & 1 ; var >>= 1; num += var & 1);

This diagnostic is classified as:

Unicorn with delicious cookie
Our website uses cookies to enhance your browsing experience.
Accept