Struct rustc_middle::ty::CrateVariancesMap

pub struct CrateVariancesMap<'tcx> {
    pub variances: FxHashMap<DefId, &'tcx [Variance]>,
}

The crate variances map is computed during typeck and contains the variance of every item in the local crate. You should not use it directly, because to do so will make your pass dependent on the HIR of every item in the local crate. Instead, use tcx.variances_of() to get the variance for a particular item.

Fields

variances: FxHashMap<DefId, &'tcx [Variance]>

For each item with generics, maps to a vector of the variance of its generics. If an item has no generics, it will have no entry.

Trait Implementations

impl<'tcx> Debug for CrateVariancesMap<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for CrateVariancesMap<'tcx>

fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

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: 32 bytes