3 ms·
The issue with null, as commonly implemented, is that null is a value that inhabits all types. So in that sense it is a defect of the type system.
by boloust 6y ago
The issue with null, as commonly implemented, is that null is a value that inhabits all types. So in that sense it is a defect of the type system.
- deleted 6y ago[deleted]
- guenthert 6y agoIn Common Lisp, T is the "any" type (which makes sense there, as type specifiers can be formed using unions using (or type-A type-B ...) lists), the value NIL is the sole instance of the type NULL.