Hi there,
I'm working through the very excellent "Write an Interpreter in Go"
([https://interpreterbook.com/](https://interpreterbook.com/))
I'm trying to follow the book but implementing in nim rather than Go, but
running into a wall trying to translate Go into Nim.
For example passing pointers to objects or returning pointers to objects.
An example in Go
/* A lexer */
type Lexer struct {
input string
position int
readPosition int
ch byte
}
/* Function to create a new lexer */
func New(input string) *Lexer {
l := &Lexer{input: input}
}
Translating to nim I have:
type TLexer = object
input : string
position : int
readPosition : int
ch : byte
proc new(input : string) : TLexer =
let l = new TLexer(input, 0, 0, 0)
return l
but I know I'm not doing this well. #1 Not sure how to create a Lexer object #2
Not sure how to return a pointer from a proc.
Initially I tried defining the Lexer as
type Lexer = ref object
...
But that did not compile.
I also tried defining the proc as
proc New(input: string): ref Lexer =
....
But also didn't compile.
The nim way of working with objects is a bit new to me. I'm sure it's something
very simple but not sure what is that little bit I'm nt getting.
