Question

Shouldn’t it be ok to use static_cast to convert int to bool as it converts reverse of implicit conversion but i still get a warning?

Example:

MSVC++ 8

bool bit = static_cast<bool>(100);

Answer 1

Just because the conversion a => b is implicit doesn’t say anything about the viability of the reverse, b => a.

In your case, you shouldn’t cast at all. Just do the obvious thing: compare:

bool result = int_value != 0;

This is the only logically correct way of converting an int to bool and it makes the code much more readable (because it makes the assumptions explicit).

The same applies for the reverse, by the way. Converting implicitly from bool to int is just lazy. Make the mapping explicit:

int result = condition ? 1 : 0;