Advanced type conversion and support for optionals [ Oct 27 ]

This month we have been working on the most difficult aspect of the converter - type conversion and optionals.

Since the Swift language is considerably more strongly typed than Objective-C,
explicit type conversions are required in many cases, as with incompatible function parameters and return types:

• An implicit cast is used whenever a type of expression is different from a context type;
• An ?? operator is used to unwrap optional expressions whenever possible;
• Most type conversion and unwrapping cases are supported, depending on the expression and context types.