# V3527. AUTOSAR. The return value of non-void function should be used.

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

It is possible to call a non-void function without using its return value afterward. There could be an error behind such behavior.

Values returned by non-void functions must always be used. Example of non-compliant code:

    int Foo(int x)
    {
      return x + x;
    }

    void Bar(int x)
    {
      Foo(x);
    }

If the loss of the return value was planned by the developer, it can be cast to the type 'void'. Example of compliant code:

    void Bar(int x)
    {
      (void)Foo(x);
    }

This diagnostic is classified as:

AUTOSAR-A0.1.2