1 use crate::ich::Fingerprint;
2 use rustc_data_structures::fx::FxHashMap;
3 use super::dep_node::DepNode;
4 use super::serialized::{SerializedDepGraph, SerializedDepNodeIndex};
6 #[derive(Debug, RustcEncodable, RustcDecodable, Default)]
7 pub struct PreviousDepGraph {
8 data: SerializedDepGraph,
9 index: FxHashMap<DepNode, SerializedDepNodeIndex>,
12 impl PreviousDepGraph {
13 pub fn new(data: SerializedDepGraph) -> PreviousDepGraph {
14 let index: FxHashMap<_, _> = data.nodes
16 .map(|(idx, &dep_node)| (dep_node, idx))
18 PreviousDepGraph { data, index }
22 pub fn edge_targets_from(
24 dep_node_index: SerializedDepNodeIndex
25 ) -> &[SerializedDepNodeIndex] {
26 self.data.edge_targets_from(dep_node_index)
30 pub fn index_to_node(&self, dep_node_index: SerializedDepNodeIndex) -> DepNode {
31 self.data.nodes[dep_node_index]
35 pub fn node_to_index(&self, dep_node: &DepNode) -> SerializedDepNodeIndex {
40 pub fn node_to_index_opt(&self, dep_node: &DepNode) -> Option<SerializedDepNodeIndex> {
41 self.index.get(dep_node).cloned()
45 pub fn fingerprint_of(&self, dep_node: &DepNode) -> Option<Fingerprint> {
48 .map(|&node_index| self.data.fingerprints[node_index])
52 pub fn fingerprint_by_index(&self,
53 dep_node_index: SerializedDepNodeIndex)
55 self.data.fingerprints[dep_node_index]
58 pub fn node_count(&self) -> usize {