50 lines
1003 B
Rust
50 lines
1003 B
Rust
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use crate::obj::prelude::*;
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use std::collections::BTreeMap;
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#[derive(Default)]
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pub struct Frame {
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stack: Vec<DynRef>,
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ip: usize,
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return_value: Option<DynRef>,
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locals: BTreeMap<Sym, DynRef>,
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}
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impl Frame {
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pub fn new() -> Self {
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Default::default()
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}
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pub fn push(&mut self, obj_ref: DynRef) {
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self.stack.push(obj_ref)
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}
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pub fn pop(&mut self) -> Option<DynRef> {
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self.stack.pop()
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}
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pub fn ip(&self) -> usize {
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self.ip
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}
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pub fn set_ip(&mut self, ip: usize) {
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self.ip = ip;
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}
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pub fn return_value(&self) -> Option<DynRef> {
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self.return_value
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}
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pub fn set_return_value(&mut self, obj_ref: DynRef) {
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self.return_value = Some(obj_ref);
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}
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pub fn get_local(&self, sym: Sym) -> Option<DynRef> {
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self.locals.get(&sym).copied()
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}
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pub fn set_local(&mut self, sym: Sym, obj_ref: DynRef) -> Option<DynRef> {
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self.locals.insert(sym, obj_ref)
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}
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}
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