Struct rustc_infer::infer::InferCtxtBuilder[][src]

pub struct InferCtxtBuilder<'tcx> {
    tcx: TyCtxt<'tcx>,
    fresh_typeck_results: Option<RefCell<TypeckResults<'tcx>>>,
    defining_use_anchor: LocalDefId,
Expand description

Helper type of a temporary returned by tcx.infer_ctxt(). Necessary because we can’t write the following bound: F: for<'b, 'tcx> where 'tcx FnOnce(InferCtxt<'b, 'tcx>).


tcx: TyCtxt<'tcx>fresh_typeck_results: Option<RefCell<TypeckResults<'tcx>>>defining_use_anchor: LocalDefId


Used only by rustc_typeck during body type-checking/inference, will initialize in_progress_typeck_results with fresh TypeckResults. Will also change the scope for opaque type defining use checks to the given owner.

Whenever the InferCtxt should be able to handle defining uses of opaque types, you need to call this function. Otherwise the opaque type will be treated opaquely.

It is only meant to be called in two places, for typeck (via with_fresh_in_progress_typeck_results) and for the inference context used in mir borrowck.

Given a canonical value C as a starting point, create an inference context that contains each of the bound values within instantiated as a fresh variable. The f closure is invoked with the new infcx, along with the instantiated value V and a substitution S. This substitution S maps from the bound values in C to their instantiated values in V (in other words, S(C) = V).

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Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

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.


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: 656 bytes