Trait DepNodeKey 

pub trait DepNodeKey<'tcx>: Debug + Sized {
    // Required methods
    fn key_fingerprint_style() -> KeyFingerprintStyle;
    fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint;
    fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String;
    fn try_recover_key(tcx: TyCtxt<'tcx>, dep_node: &DepNode) -> Option<Self>;
}

Trait for query keys as seen by dependency-node tracking.

Required Methods

fn key_fingerprint_style() -> KeyFingerprintStyle

fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

This method turns a query key into an opaque Fingerprint to be used in DepNode.

fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String

fn try_recover_key(tcx: TyCtxt<'tcx>, dep_node: &DepNode) -> Option<Self>

This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes during red-green evaluation. The query system will only call this method if fingerprint_style() is not FingerprintStyle::Opaque. It is always valid to return None here, in which case incremental compilation will treat the query as having changed instead of forcing it.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<'tcx> DepNodeKey<'tcx> for (DefId, DefId)

fn key_fingerprint_style() -> KeyFingerprintStyle

fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String

impl<'tcx> DepNodeKey<'tcx> for ()

fn key_fingerprint_style() -> KeyFingerprintStyle

fn to_fingerprint(&self, _: TyCtxt<'tcx>) -> Fingerprint

fn try_recover_key(_: TyCtxt<'tcx>, _: &DepNode) -> Option<Self>

impl<'tcx> DepNodeKey<'tcx> for HirId

fn key_fingerprint_style() -> KeyFingerprintStyle

fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String

fn try_recover_key(tcx: TyCtxt<'tcx>, dep_node: &DepNode) -> Option<Self>

impl<'tcx> DepNodeKey<'tcx> for OwnerId

fn key_fingerprint_style() -> KeyFingerprintStyle

fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String

fn try_recover_key(tcx: TyCtxt<'tcx>, dep_node: &DepNode) -> Option<Self>

impl<'tcx> DepNodeKey<'tcx> for CrateNum

fn key_fingerprint_style() -> KeyFingerprintStyle

fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String

fn try_recover_key(tcx: TyCtxt<'tcx>, dep_node: &DepNode) -> Option<Self>

impl<'tcx> DepNodeKey<'tcx> for DefId

fn key_fingerprint_style() -> KeyFingerprintStyle

fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String

fn try_recover_key(tcx: TyCtxt<'tcx>, dep_node: &DepNode) -> Option<Self>

impl<'tcx> DepNodeKey<'tcx> for LocalDefId

fn key_fingerprint_style() -> KeyFingerprintStyle

fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String

fn try_recover_key(tcx: TyCtxt<'tcx>, dep_node: &DepNode) -> Option<Self>

impl<'tcx> DepNodeKey<'tcx> for LocalModDefId

fn key_fingerprint_style() -> KeyFingerprintStyle

fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String

fn try_recover_key(tcx: TyCtxt<'tcx>, dep_node: &DepNode) -> Option<Self>

impl<'tcx> DepNodeKey<'tcx> for ModDefId

fn key_fingerprint_style() -> KeyFingerprintStyle

fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String

fn try_recover_key(tcx: TyCtxt<'tcx>, dep_node: &DepNode) -> Option<Self>

Implementors

impl<'tcx, T> DepNodeKey<'tcx> for T

where T: for<'a> HashStable<StableHashingContext<'a>> + Debug,