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.
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.

>
>
>
V2527. MISRA. A switch-expression shoul…
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

V2527. MISRA. A switch-expression should not have Boolean type. Consider using of 'if-else' construct.

Jan. 17, 2019

This diagnostic rule is based on the software development guidelines developed by MISRA (Motor Industry Software Reliability Association).

A Boolean value can be cast to an integer and, therefore, can be used as a control variable in a 'switch' statement. However, it is preferable to use an 'if-else' construct in such cases as it conveys the developer's intentions in a clearer and more explicit way.

Original code:

int foo(unsigned a, unsigned b)
{
  while (a != 0 && b != 0)
  {
    switch (a > b) // <=
    {
    case 0:
      a -= b;
      break;
    default:
      b -= a;
      break;
    }
  }
  return a;
}

Better version:

int foo(unsigned a, unsigned b)
{
  while (a != 0 && b != 0)
  {
    if (a > b)
    {
      b -= a;
    }
    else
    {
      a -= b;
    }
  }
  return a;
}

This diagnostic is classified as:

  • MISRA-C-16.7
  • MISRA-CPP-6.4.7
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