struct UniversalRegionIndices<'tcx> {
    indices: FxHashMap<Region<'tcx>, RegionVid>,
}

Fields

indices: FxHashMap<Region<'tcx>, RegionVid>

For those regions that may appear in the parameter environment (’static and early-bound regions), we maintain a map from the ty::Region to the internal RegionVid we are using. This is used because trait matching and type-checking will feed us region constraints that reference those regions and we need to be able to map them our internal RegionVid. This is basically equivalent to an InternalSubsts, except that it also contains an entry for ReStatic – it might be nice to just use a substs, and then handle ReStatic another way.

Implementations

Initially, the UniversalRegionIndices map contains only the early-bound regions in scope. Once that is all setup, we come in later and instantiate the late-bound regions, and then we insert the ReFree version of those into the map as well. These are used for error reporting.

Converts r into a local inference variable: r can either by a ReVar (i.e., already a reference to an inference variable) or it can be 'static or some early-bound region. This is useful when taking the results from type-checking and trait-matching, which may sometimes reference those regions from the ParamEnv. It is also used during initialization. Relies on the indices map having been fully initialized.

Replaces all free regions in value with region vids, as returned by to_region_vid.

Trait Implementations

Formats the value using the given formatter. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

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