Splice/test.spl at main · Open-Splice/Splice · GitHub

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let stack = []

func push(v) {
    append(stack, v)
}
func pop() {
    let n = len(stack)
    let v = stack[n - 1]
    stack = slice(stack, 0, n - 1)
    return v
}

func is_number(t) {
    return to_number(t) != 0 or t == "0"
}

func exec(token) {

    if (token == "") {
        return
    }

    if (token == "+") {
        let b = pop()
        let a = pop()
        push(a + b)
        return
    }

    if (token == "-") {
        let b = pop()
        let a = pop()
        push(a - b)
        return
    }

    if (token == "*") {
        let b = pop()
        let a = pop()
        push(a * b)
        return
    }

    if (token == "/") {
        let b = pop()
        let a = pop()
        push(a / b)
        return
    }

    if (token == "print") {
        print(pop())
        return
    }

    push(to_number(token))
}x

func run(program) {
    let tokens = split(program, "\n")
    let i = 0

    while (i < len(tokens)) {
        exec(tokens[i])
        i = i + 1
    }
}
let code = "
10
20
+
print
"
print("RUNNING")
run(code)