Use an array instead of a switch in token_kind_name

[RHL120]

This change removes 19 lines of code and gives the function a (negligible) speed improvement .

[kasimeka]

this removes the concrete link between each Token_kind value and the name that represents it, which makes the code less readable and less extensible. the data structure that would be an improvement is a map, but that's pretty overkill

[RHL120]

this removes the concrete link between each Token_kind value and the name that represents it, which makes the code less readable and less extensible. the data structure that would be an improvement is a map, but that's pretty overkill

Yeah I guess there is a trade off here, I would chose the array method but the maintainer might disagree with me.
Thanks for the review!

[BillKek]

Speed improvement makes by the compiler itself, IMHO. And UNREACHABLE feature lost.

[RHL120]

Speed improvement makes by the compiler itself, IMHO. And UNREACHABLE feature lost.

I can put it back.