try catch question

[ahura24]

hi every body . why this code is wrong ? and how to fix it ?

try
{
throw; // i want to throw catch block . but i dont want define variable!
// i want just throw into first catch block . like __leave in __try/__finally
}
catch (...)
{
}

[hanst99]

You have to throw something that can be catched. Ever tried catching something that's not there?

You don't actually need to declare a variable, you can just

throw std::runtime_error("Short description of your problem");

Or, if you really just want to randomly throw something

throw 1;

You can actually use throw without an expression behind it, but that's only allowed in catch blocks, and only rethrows the catched exception.