[][src]Struct rustc_typeck::collect::ItemCtxt

pub struct ItemCtxt<'a, 'tcx: 'a> {
    tcx: TyCtxt<'a, 'tcx, 'tcx>,
    item_def_id: DefId,
}
🔬 This is a nightly-only experimental API. (rustc_private)

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Context specific to some particular item. This is what implements AstConv. It has information about the predicates that are defined on the trait. Unfortunately, this predicate information is available in various different forms at various points in the process. So we can't just store a pointer to e.g. the AST or the parsed ty form, we have to be more flexible. To this end, the ItemCtxt is parameterized by a DefId that it uses to satisfy get_type_parameter_bounds requests, drawing the information from the AST (hir::Generics), recursively.

Fields

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

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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?

Methods

impl<'a, 'tcx> ItemCtxt<'a, 'tcx>
[src]

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

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impl<'a, 'tcx> ItemCtxt<'a, 'tcx>
[src]

🔬 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?

impl<'a, 'tcx> ItemCtxt<'a, 'tcx>
[src]

Important traits for Vec<u8>

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

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Find bounds from hir::Generics. This requires scanning through the AST. We do this to avoid having to convert all the bounds, which would create artificial cycles. Instead we can only convert the bounds for a type parameter X if X::Foo is used.

Trait Implementations

impl<'a, 'tcx> AstConv<'tcx, 'tcx> for ItemCtxt<'a, 'tcx>
[src]

🔬 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?

Returns the set of bounds in scope for the type parameter with the given id. Read more

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

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What lifetime should we use when a lifetime is omitted (and not elided)?

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

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What type should we use when a type is omitted?

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

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Projecting an associated type from a (potentially) higher-ranked trait reference is more complicated, because of the possibility of late-bound regions appearing in the associated type binding. This is not legal in function signatures for that reason. In a function body, we can always handle it because we can use inference variables to remove the late-bound regions. Read more

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

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Normalize an associated type coming from the user.

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

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Invoked when we encounter an error from some prior pass (e.g. resolve) that is translated into a ty-error. This is used to help suppress derived errors typeck might otherwise report. Read more

🔬 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?

Same as ty_infer, but with a known type parameter definition.

Auto Trait Implementations

impl<'a, 'tcx> !Send for ItemCtxt<'a, 'tcx>

impl<'a, 'tcx> !Sync for ItemCtxt<'a, 'tcx>

Blanket Implementations

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

impl<T> MaybeResult for T
[src]

🔬 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?

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