pub struct InferCtxtBuilder<'tcx> {
    tcx: TyCtxt<'tcx>,
    defining_use_anchor: DefiningAnchor,
    considering_regions: bool,
    skip_leak_check: bool,
    intercrate: bool,
    next_trait_solver: bool,
}
Expand description

Used to configure inference contexts before their creation.

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§tcx: TyCtxt<'tcx>§defining_use_anchor: DefiningAnchor§considering_regions: bool§skip_leak_check: bool§intercrate: bool

Whether we are in coherence mode.

§next_trait_solver: bool

Whether we should use the new trait solver in the local inference context, which affects things like which solver is used in predicate_may_hold.

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impl<'tcx> InferCtxtBuilder<'tcx>

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pub fn with_opaque_type_inference( self, defining_use_anchor: DefiningAnchor ) -> Self

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 Inherited::build) and for the inference context used in mir borrowck.

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pub fn with_next_trait_solver(self, next_trait_solver: bool) -> Self

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pub fn intercrate(self, intercrate: bool) -> Self

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pub fn ignoring_regions(self) -> Self

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pub fn skip_leak_check(self, skip_leak_check: bool) -> Self

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pub fn build_with_canonical<T>( &mut self, span: Span, canonical: &Canonical<'tcx, T> ) -> (InferCtxt<'tcx>, T, CanonicalVarValues<'tcx>)where T: TypeFoldable<TyCtxt<'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).

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pub fn build(&mut self) -> InferCtxt<'tcx>

Auto Trait Implementations§

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impl<'tcx> !RefUnwindSafe for InferCtxtBuilder<'tcx>

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impl<'tcx> !Send for InferCtxtBuilder<'tcx>

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impl<'tcx> !Sync for InferCtxtBuilder<'tcx>

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impl<'tcx> Unpin for InferCtxtBuilder<'tcx>

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impl<'tcx> !UnwindSafe for InferCtxtBuilder<'tcx>

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::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: 16 bytes