Struct rustc_trait_selection::infer::InferCtxtBuilder
source · pub struct InferCtxtBuilder<'tcx> {
tcx: TyCtxt<'tcx>,
defining_use_anchor: DefiningAnchor,
considering_regions: bool,
fresh_typeck_results: Option<RefCell<TypeckResults<'tcx>>>,
normalize_fn_sig_for_diagnostic: Option<Rc<dyn Fn(&InferCtxt<'_, 'tcx>, Binder<'tcx, FnSig<'tcx>>) + 'static>>,
}
Expand description
A temporary returned by tcx.infer_ctxt()
. This is necessary
for multiple InferCtxt
to share the same in_progress_typeck_results
without using Rc
or something similar.
Fields
tcx: TyCtxt<'tcx>
defining_use_anchor: DefiningAnchor
considering_regions: bool
fresh_typeck_results: Option<RefCell<TypeckResults<'tcx>>>
normalize_fn_sig_for_diagnostic: Option<Rc<dyn Fn(&InferCtxt<'_, 'tcx>, Binder<'tcx, FnSig<'tcx>>) + 'static>>
Trait Implementations
sourceimpl<'tcx> InferCtxtBuilderExt<'tcx> for InferCtxtBuilder<'tcx>
impl<'tcx> InferCtxtBuilderExt<'tcx> for InferCtxtBuilder<'tcx>
sourcefn enter_canonical_trait_query<K, R>(
&mut self,
canonical_key: &Canonical<'tcx, K>,
operation: impl FnOnce(&InferCtxt<'_, 'tcx>, &mut dyn TraitEngine<'tcx>, K) -> Fallible<R>
) -> Fallible<CanonicalizedQueryResponse<'tcx, R>>where
K: TypeFoldable<'tcx>,
R: Debug + TypeFoldable<'tcx>,
Canonical<'tcx, QueryResponse<'tcx, R>>: ArenaAllocatable<'tcx>,
fn enter_canonical_trait_query<K, R>(
&mut self,
canonical_key: &Canonical<'tcx, K>,
operation: impl FnOnce(&InferCtxt<'_, 'tcx>, &mut dyn TraitEngine<'tcx>, K) -> Fallible<R>
) -> Fallible<CanonicalizedQueryResponse<'tcx, R>>where
K: TypeFoldable<'tcx>,
R: Debug + TypeFoldable<'tcx>,
Canonical<'tcx, QueryResponse<'tcx, R>>: ArenaAllocatable<'tcx>,
The “main method” for a canonicalized trait query. Given the
canonical key canonical_key
, this method will create a new
inference context, instantiate the key, and run your operation
op
. The operation should yield up a result (of type R
) as
well as a set of trait obligations that must be fully
satisfied. These obligations will be processed and the
canonical result created.
Returns NoSolution
in the event of any error.
(It might be mildly nicer to implement this on TyCtxt
, and
not InferCtxtBuilder
, but that is a bit tricky right now.
In part because we would need a for<'tcx>
sort of
bound for the closure and in part because it is convenient to
have 'tcx
be free on this function so that we can talk about
K: TypeFoldable<'tcx>
.)
Auto Trait Implementations
impl<'tcx> !RefUnwindSafe for InferCtxtBuilder<'tcx>
impl<'tcx> !Send for InferCtxtBuilder<'tcx>
impl<'tcx> !Sync for InferCtxtBuilder<'tcx>
impl<'tcx> Unpin for InferCtxtBuilder<'tcx>
impl<'tcx> !UnwindSafe for InferCtxtBuilder<'tcx>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
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: 696 bytes