Fantom: Typesystem is unsound, far away from correctness, only hard-coded Generics, many basic things are not expressions, like if-then-else or try-catch.
Ceylon: if-then-else or try-catch are no expressions, embraces null, unstable software, breaks backward compatibility in minor releases.
Kotlin: Embraces null, inexpressive type system limits the things the compiler can check, unstable software, breaks backward compatibility in minor releases.
I am not sure what you mean by "embraces null". It sounds like a good thing (from what I know about the languages) but you have clubbed it in a list of cons.
Comments
Fantom: Typesystem is unsound, far away from correctness, only hard-coded Generics, many basic things are not expressions, like if-then-else or try-catch.
Ceylon: if-then-else or try-catch are no expressions, embraces null, unstable software, breaks backward compatibility in minor releases.
Kotlin: Embraces null, inexpressive type system limits the things the compiler can check, unstable software, breaks backward compatibility in minor releases.
Good summary. New "null-full" languages should be shamed publicly. Null as a bottom-type is a semantic wart.
I am not sure what you mean by "embraces null". It sounds like a good thing (from what I know about the languages) but you have clubbed it in a list of cons.