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use crate::ich::Fingerprint;
use rustc_data_structures::fx::FxHashMap;
use super::dep_node::DepNode;
use super::serialized::{SerializedDepGraph, SerializedDepNodeIndex};
#[derive(Debug, RustcEncodable, RustcDecodable, Default)]
pub struct PreviousDepGraph {
data: SerializedDepGraph,
index: FxHashMap<DepNode, SerializedDepNodeIndex>,
}
impl PreviousDepGraph {
pub fn new(data: SerializedDepGraph) -> PreviousDepGraph {
let index: FxHashMap<_, _> = data.nodes
.iter_enumerated()
.map(|(idx, &dep_node)| (dep_node, idx))
.collect();
PreviousDepGraph { data, index }
}
#[inline]
pub fn edge_targets_from(
&self,
dep_node_index: SerializedDepNodeIndex
) -> &[SerializedDepNodeIndex] {
self.data.edge_targets_from(dep_node_index)
}
#[inline]
pub fn index_to_node(&self, dep_node_index: SerializedDepNodeIndex) -> DepNode {
self.data.nodes[dep_node_index]
}
#[inline]
pub fn node_to_index(&self, dep_node: &DepNode) -> SerializedDepNodeIndex {
self.index[dep_node]
}
#[inline]
pub fn node_to_index_opt(&self, dep_node: &DepNode) -> Option<SerializedDepNodeIndex> {
self.index.get(dep_node).cloned()
}
#[inline]
pub fn fingerprint_of(&self, dep_node: &DepNode) -> Option<Fingerprint> {
self.index
.get(dep_node)
.map(|&node_index| self.data.fingerprints[node_index])
}
#[inline]
pub fn fingerprint_by_index(&self,
dep_node_index: SerializedDepNodeIndex)
-> Fingerprint {
self.data.fingerprints[dep_node_index]
}
pub fn node_count(&self) -> usize {
self.index.len()
}
}
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