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 do not see the email in your inbox, please check if it is filtered to one of the following folders:

  • Promotion
  • Updates
  • Spam

Webinar: Parsing C++ - 10.10

>
>
>
V3548. AUTOSAR. Functions should not be…
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

V3548. AUTOSAR. Functions should not be declared at block scope.

Dec 15 2020

This diagnostic rule is based on the software development guidelines developed by AUTOSAR (AUTomotive Open System ARchitecture).

A function declared at the block scope will also be visible in the namespace enclosing the block.

Look at the example:

namespace Foo
{
  void func()
  {
    void bar(); // <=
    bar();
  }
}

void Foo::bar() // Function 'bar' is visible here
{
}

The programmer wanted to narrow the scope of the function by declaring it in the 'func' function block. However, the 'bar' function is also visible outside the 'Foo' namespace. Therefore, one should declare the function explicitly in the enclosing namespace:

namespace Foo
{
  void bar();
  void func()
  {
    bar();
  }
}

void Foo::bar() // Function 'bar' is visible
{
}

Also, due to the ambiguity of the C++ grammar, the function declaration may look like an object declaration:

struct A
{
    void foo();
};

int main()
{
  A a();
  a.foo(); // compile-time error
}

This problem is known as "Most vexing parse": the compiler resolves this ambiguity of "declaring a function or an object" in favor of "declare a function". Therefore, despite the programmer's intention to declare an object of the 'A' class and call the 'A::foo' non-static member function, the compiler will perceive this as a declaration of the 'a' function, that does not accept parameters and returns type 'A'.

To avoid confusion, the analyzer also warns about such declarations.

This diagnostic is classified as:

  • AUTOSAR-M3.1.2