access value from a mutable block

[RnBrgn]

x: { 1 2 3 4 }
x -> 1
returns 2

var 'y ref { 1 2 3 4 }
append! 5 y
y -> 1
Error: Wrong type or missing key for get-arrow
deref y
y -> 1
Error: Wrong type or missing key for get-arrow

How do you access a value from y after making it mutable so you can append?

[refaktor]

Hi,

that doesn't work because so I haven't decided yet the whole story around reffed (pointers to values) and derefed (values) values. Ref makes a pointer and deref turns it back to value.

What I haven't yet figured out is if builtins should work with both, values and pointers of values, or you would explicitly need them converted back to vales y .deref -> 1, or just some functions should also work with pointers or if all values, or values like blocks / lists / dicts should always just be pointers not values ( I would also need to make extensive tests what makes more sense performance and memmory wise).

I now make changes so -> ~> also accept pointers so your code above should work. And I need to improve that error message, always that I get it , it doesn't reall make that much sense, and some more inforamtion would help.