[][src]Struct rustc::infer::combine::CombineFields

pub struct CombineFields<'infcx, 'gcx: 'infcx + 'tcx, 'tcx: 'infcx> {
    pub infcx: &'infcx InferCtxt<'infcx, 'gcx, 'tcx>,
    pub trace: TypeTrace<'tcx>,
    pub cause: Option<Cause>,
    pub param_env: ParamEnv<'tcx>,
    pub obligations: PredicateObligations<'tcx>,
}
🔬 This is a nightly-only experimental API. (rustc_private)

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Fields

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🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Methods

impl<'infcx, 'gcx, 'tcx> CombineFields<'infcx, 'gcx, 'tcx>
[src]

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🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

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Here dir is either EqTo, SubtypeOf, or SupertypeOf. The idea is that we should ensure that the type a_ty is equal to, a subtype of, or a supertype of (respectively) the type to which b_vid is bound.

Since b_vid has not yet been instantiated with a type, we will first instantiate b_vid with a generalized version of a_ty. Generalization introduces other inference variables wherever subtyping could occur.

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Attempts to generalize ty for the type variable for_vid. This checks for cycle -- that is, whether the type ty references for_vid. The dir is the "direction" for which we a performing the generalization (i.e., are we producing a type that can be used as a supertype etc).

Preconditions:

  • for_vid is a "root vid"

impl<'a, 'gcx, 'tcx> CombineFields<'a, 'gcx, 'tcx>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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The value consists of a pair (t, u) where t is the matcher and u is a value. The idea is to find a substitution S such that S(t) == b, and then return S(u). In other words, find values for the late-bound regions in a that can make t == b and then replace the LBR in u with those values.

This routine is (as of this writing) used in trait matching, particularly projection.

NB. It should not happen that there are LBR appearing in U that do not appear in T. If that happens, those regions are unconstrained, and this routine replaces them with 'static.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Trait Implementations

impl<'infcx, 'gcx: 'infcx + 'tcx, 'tcx: 'infcx> Clone for CombineFields<'infcx, 'gcx, 'tcx>
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Auto Trait Implementations

impl<'infcx, 'gcx, 'tcx> !Send for CombineFields<'infcx, 'gcx, 'tcx>

impl<'infcx, 'gcx, 'tcx> !Sync for CombineFields<'infcx, 'gcx, 'tcx>

Blanket Implementations

impl<T> MaybeResult for T
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

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impl<'a, T> Captures for T where
    T: ?Sized
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> From for T
[src]

Performs the conversion.

impl<T, U> Into for T where
    U: From<T>, 
[src]

Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
[src]

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
[src]

Important traits for &'a mut R

Immutably borrows from an owned value. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
[src]

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> BorrowMut for T where
    T: ?Sized
[src]

Important traits for &'a mut R

Mutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
[src]

🔬 This is a nightly-only experimental API. (get_type_id)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<E> SpecializationError for E
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

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Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S is the encoder/decoder state type, T is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more

impl<T> Erased for T
[src]

impl<T> Send for T where
    T: ?Sized
[src]

impl<T> Sync for T where
    T: ?Sized
[src]

impl<T> Erased for T