Documentation note: int with value 0 not same as false

[quanglewangle]

Note for documentation: condition in if then must evaluate to boolean and an int with value 0 is not the same as false

[degory]

Yes, if requires a bool value.

In general ghūl, by design, doesn't do any implicit type conversion except up the inheritance hierarchy.

You can assign instances of string to variables of type object, for example, or pass string instances to functions expecting parameters of type object, but you can't assign int values to bool variables, and all the statements that test a condition expect exactly bool.

Also, none of the built in operators do any implicit type conversion - you can't add integers to characters, or bytes, or signed values to unsigned values, etc. without explicitly casting.