missing enums with fields

[pznknmtb]

some languages support enums with extra fields.

for according java code see public enum Planet on https://docs.oracle.com/javase/tutorial/java/javaOO/enum.html

as example tokens.v could be more clean and efficient (omitting code like fn build_token_str())

enum Token {
        INT('int')
        STRING('string')
        ...

[medvednikov]

Yes, this will be implemented.