Struct rustc_infer::infer::InferCtxtBuilder

pub struct InferCtxtBuilder<'tcx> {
    tcx: TyCtxt<'tcx>,
    fresh_typeck_results: Option<RefCell<TypeckResults<'tcx>>>,
}

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>).

Fields

tcx: TyCtxt<'tcx>

fresh_typeck_results: Option<RefCell<TypeckResults<'tcx>>>

Implementations

impl<'tcx> InferCtxtBuilder<'tcx>

pub fn with_fresh_in_progress_typeck_results(
    self,
    table_owner: LocalDefId
) -> Self

Used only by rustc_typeck during body type-checking/inference, will initialize in_progress_typeck_results with fresh TypeckResults.

pub fn enter_with_canonical<T, R>(
    &mut self,
    span: Span,
    canonical: &Canonical<'tcx, T>,
    f: impl for<'a> FnOnce(InferCtxt<'a, 'tcx>, T, CanonicalVarValues<'tcx>) -> R
) -> R where
    T: TypeFoldable<'tcx>, 

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).

pub fn enter<R>(
    &mut self,
    f: impl for<'a> FnOnce(InferCtxt<'a, 'tcx>) -> R
) -> R

Layout

Note: Most layout information is completely unstable and may be different between compiler versions and platforms. 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: 640 bytes