Trait rustc_middle::dep_graph::DepNodeExt

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pub trait DepNodeExt: Sized {
    // Required methods
    fn extract_def_id(&self, tcx: TyCtxt<'_>) -> Option<DefId>;
    fn from_label_string(
        tcx: TyCtxt<'_>,
        label: &str,
        def_path_hash: DefPathHash
    ) -> Result<Self, ()>;
    fn has_label_string(label: &str) -> bool;
}

Required Methods§

source

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.

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

Used in testing

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fn has_label_string(label: &str) -> bool

Used in testing

Implementors§