When is a function try block useful?

Question

I\'m wondering when programmers use function try blocks. When is it useful?

void f(int i)
try
{
   if ( i  < 0 ) 
      throw \"less than zero\";
   std::         


        

Answer 1

You use it in constructors to catch errors from initializers. Usually, you don't catch those errors, so this is a quite exceptional use.

Otherwise, it is useless: unless I'm proven wrong,

void f() try { ... } catch (...) { ... }

is strictly equivalent to

void f() { try { ... } catch (...) { ... } }