import { Word, emptyWord } from "./word"

export interface Memory<Width extends number> {
    value: () => Word<Width>
    set: (word: Word<Width>) => void
}

export function memory<Width extends number>(initialValue: Word<Width>): Memory<Width>
export function memory<Width extends number>(width: Width): Memory<Width>
export function memory<Width extends number>(valueOrWidth: Width | Word<Width>): Memory<Width> {
    let word = typeof valueOrWidth === 'number' ? emptyWord(valueOrWidth) : valueOrWidth

    function set(newWord: Word<Width>) {
        word = newWord
    }

    function value() {
        return word
    }

    return {
        value,
        set
    }
}