Can a void-returning function g return f(); when f returns void?

Question

Consider the following snippet:

void f(void);

void g(…)
{
  …
  return f();
  …
}

Is this return f(); valid according to C11?

Answer 1

Anything after return is an expression.

6.8.6:1 Jump statements

Syntax  

   ...
   return expressionopt; 

And standard says that:

A return statement with an expression shall not appear in a function whose return type is void. ....

f() is also an expression here. The compiler should raise a warning

[Warning] ISO C forbids 'return' with expression, in function returning void [-pedantic]