1 use super::serialized::{SerializedDepGraph, SerializedDepNodeIndex};
2 use super::{DepKind, DepNode};
3 use rustc_data_structures::fingerprint::Fingerprint;
4 use rustc_data_structures::fx::FxHashMap;
6 #[derive(Debug, RustcEncodable, RustcDecodable)]
7 pub struct PreviousDepGraph<K: DepKind> {
8 data: SerializedDepGraph<K>,
9 index: FxHashMap<DepNode<K>, SerializedDepNodeIndex>,
12 impl<K: DepKind> Default for PreviousDepGraph<K> {
13 fn default() -> Self {
14 PreviousDepGraph { data: Default::default(), index: Default::default() }
18 impl<K: DepKind> PreviousDepGraph<K> {
19 pub fn new(data: SerializedDepGraph<K>) -> PreviousDepGraph<K> {
20 let index: FxHashMap<_, _> =
21 data.nodes.iter_enumerated().map(|(idx, &dep_node)| (dep_node, idx)).collect();
22 PreviousDepGraph { data, index }
26 pub fn edge_targets_from(
28 dep_node_index: SerializedDepNodeIndex,
29 ) -> &[SerializedDepNodeIndex] {
30 self.data.edge_targets_from(dep_node_index)
34 pub fn index_to_node(&self, dep_node_index: SerializedDepNodeIndex) -> DepNode<K> {
35 self.data.nodes[dep_node_index]
39 pub fn node_to_index(&self, dep_node: &DepNode<K>) -> SerializedDepNodeIndex {
44 pub fn node_to_index_opt(&self, dep_node: &DepNode<K>) -> Option<SerializedDepNodeIndex> {
45 self.index.get(dep_node).cloned()
49 pub fn fingerprint_of(&self, dep_node: &DepNode<K>) -> Option<Fingerprint> {
50 self.index.get(dep_node).map(|&node_index| self.data.fingerprints[node_index])
54 pub fn fingerprint_by_index(&self, dep_node_index: SerializedDepNodeIndex) -> Fingerprint {
55 self.data.fingerprints[dep_node_index]
58 pub fn node_count(&self) -> usize {