jrsonnet_evaluator/
map.rs

1use jrsonnet_gc::{Gc, Trace};
2use jrsonnet_interner::IStr;
3use rustc_hash::FxHashMap;
4
5use crate::LazyVal;
6
7#[derive(Trace)]
8#[trivially_drop]
9pub struct LayeredHashMapInternals {
10	parent: Option<LayeredHashMap>,
11	current: FxHashMap<IStr, LazyVal>,
12}
13
14#[derive(Trace)]
15#[trivially_drop]
16pub struct LayeredHashMap(Gc<LayeredHashMapInternals>);
17
18impl LayeredHashMap {
19	pub fn extend(self, new_layer: FxHashMap<IStr, LazyVal>) -> Self {
20		Self(Gc::new(LayeredHashMapInternals {
21			parent: Some(self),
22			current: new_layer,
23		}))
24	}
25
26	pub fn get(&self, key: &IStr) -> Option<&LazyVal> {
27		(self.0)
28			.current
29			.get(key)
30			.or_else(|| self.0.parent.as_ref().and_then(|p| p.get(key)))
31	}
32}
33
34impl Clone for LayeredHashMap {
35	fn clone(&self) -> Self {
36		Self(self.0.clone())
37	}
38}
39
40impl Default for LayeredHashMap {
41	fn default() -> Self {
42		Self(Gc::new(LayeredHashMapInternals {
43			parent: None,
44			current: FxHashMap::default(),
45		}))
46	}
47}
jrsonnet_evaluator/map.rs

jrsonnet_evaluator/
map.rs
