package vm

import "jinx/pkg/lang/vm/value"

type CallStack []*LocalStack

func (cs *CallStack) Push() {
	*cs = append(*cs, &LocalStack{})
}

func (cs *CallStack) Pop() {
	*cs = (*cs)[:len(*cs)-1]
}

func (cs *CallStack) Top() *LocalStack {
	return (*cs)[len(*cs)-1]
}

func (cs *CallStack) Prev() *LocalStack {
	return (*cs)[len(*cs)-2]
}

type LocalStack []value.Value

func (ls *LocalStack) Push(v value.Value) {
	*ls = append(*ls, v)
}

func (ls *LocalStack) Pop() value.Value {
	v := (*ls)[len(*ls)-1]
	*ls = (*ls)[:len(*ls)-1]
	return v
}

func (ls *LocalStack) At(at int) value.Value {
	return (*ls)[at]
}