More Exceptional C++

Chapter 19. Uncaught Exceptions

Difficulty: 6

What is the standard function uncaught_exception(), and when should it be used? The answer given here isn't one that most people expect.

1. What does std::uncaught_exception() do?

2. Consider the following code:

   T::~T()
   {
     if( !std::uncaught_exception() )
     {
       // ... code that could throw ...
     }
     else
     {
           // ... code that won't throw ...
         }
       }
   

   Is this a good technique? Present arguments for and against.

3. Is there any other good use for uncaught_exception()? Discuss and draw conclusions.

Solution

Recapping uncaught_exception()

• 1. What does std::uncaught_exception() do?

The standard uncaught::exception() function provides a way ...