Browse DevX
Sign up for e-mail newsletters from DevX

Tip of the Day
Language: C++
Expertise: All
Aug 26, 1999



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Returning a void Expression from a void Function

Examine this code snippet. Will your compiler accept it?

void a_func_returning_void();
void func()
  return a_func_returning_void(); //returning a value from a void function?

At present, most compilers will not accept this code although it's perfectly legal according to the ANSI/ISO C++ standard. The problem is that until recently, returning an expression from a function that returns void was an error, even if the returned expression itself was void (as in the example above). This restriction was changed so a function with a void return type may return an expression that evaluates to void. This change was required to enable better support of generic algorithms in the Standard Template Library.

Danny Kalev
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date