Struct DepNode 

pub struct DepNode {
    pub kind: DepKind,
    pub key_fingerprint: PackedFingerprint,
}

Combination of a DepKind and a key fingerprint that uniquely identifies a node in the dep graph.

Fields

kind: DepKind

key_fingerprint: PackedFingerprint

This is typically a hash of the query key, but sometimes not.

For example, anon nodes have a fingerprint that is derived from their dependencies instead of a key.

In some cases the key value can be reconstructed from this fingerprint; see KeyFingerprintStyle.

Implementations

impl DepNode

pub fn new_no_params<'tcx>(tcx: TyCtxt<'tcx>, kind: DepKind) -> DepNode

Creates a new, parameterless DepNode. This method will assert that the DepNode corresponding to the given DepKind actually does not require any parameters.

pub fn construct<'tcx, Key>( tcx: TyCtxt<'tcx>, kind: DepKind, key: &Key, ) -> DepNode

where Key: DepNodeKey<'tcx>,

pub fn from_def_path_hash<'tcx>( tcx: TyCtxt<'tcx>, def_path_hash: DefPathHash, kind: DepKind, ) -> Self

Construct a DepNode from the given DepKind and DefPathHash. This method will assert that the given DepKind actually requires a single DefId/DefPathHash parameter.

impl DepNode

pub fn extract_def_id(&self, tcx: TyCtxt<'_>) -> Option<DefId>

Extracts the DefId corresponding to this DepNode. This will work if two conditions are met:

1. The Fingerprint of the DepNode actually is a DefPathHash, and
2. the item that the DefPath refers to exists in the current tcx.

Condition (1) is determined by the DepKind variant of the DepNode. Condition (2) might not be fulfilled if a DepNode refers to something from the previous compilation session that has been removed.

pub fn from_label_string( tcx: TyCtxt<'_>, label: &str, def_path_hash: DefPathHash, ) -> Result<DepNode, ()>

pub fn has_label_string(label: &str) -> bool

Trait Implementations

impl Clone for DepNode

fn clone(&self) -> DepNode

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DepNode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for DepNode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for DepNode

fn eq(&self, other: &DepNode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for DepNode

impl Eq for DepNode

impl StructuralPartialEq for DepNode

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 18 bytes