[][src]Struct rustc_middle::ty::sty::Const

pub struct Const<'tcx> {
    pub ty: Ty<'tcx>,
    pub val: ConstKind<'tcx>,
}
⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Typed constant value.

Fields

ty: Ty<'tcx>
⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

val: ConstKind<'tcx>
⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Implementations

impl<'tcx> Const<'tcx>[src]

pub fn from_anon_const(tcx: TyCtxt<'tcx>, def_id: LocalDefId) -> &'tcx Self[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Literals and const generic parameters are eagerly converted to a constant, everything else becomes Unevaluated.

pub fn from_value(
    tcx: TyCtxt<'tcx>,
    val: ConstValue<'tcx>,
    ty: Ty<'tcx>
) -> &'tcx Self
[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Interns the given value as a constant.

pub fn from_scalar(tcx: TyCtxt<'tcx>, val: Scalar, ty: Ty<'tcx>) -> &'tcx Self[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Interns the given scalar as a constant.

pub fn from_bits(
    tcx: TyCtxt<'tcx>,
    bits: u128,
    ty: ParamEnvAnd<'tcx, Ty<'tcx>>
) -> &'tcx Self
[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Creates a constant with the given integer value and interns it.

pub fn zero_sized(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> &'tcx Self[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Creates an interned zst constant.

pub fn from_bool(tcx: TyCtxt<'tcx>, v: bool) -> &'tcx Self[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Creates an interned bool constant.

pub fn from_usize(tcx: TyCtxt<'tcx>, n: u64) -> &'tcx Self[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Creates an interned usize constant.

pub fn try_eval_bits(
    &self,
    tcx: TyCtxt<'tcx>,
    param_env: ParamEnv<'tcx>,
    ty: Ty<'tcx>
) -> Option<u128>
[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Attempts to evaluate the given constant to bits. Can fail to evaluate in the presence of generics (or erroneous code) or if the value can't be represented as bits (e.g. because it contains const generic parameters or pointers).

pub fn eval(&self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> &Const<'tcx>[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Tries to evaluate the constant if it is Unevaluated. If that doesn't succeed, return the unevaluated constant.

pub fn try_eval_bool(
    &self,
    tcx: TyCtxt<'tcx>,
    param_env: ParamEnv<'tcx>
) -> Option<bool>
[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

pub fn try_eval_usize(
    &self,
    tcx: TyCtxt<'tcx>,
    param_env: ParamEnv<'tcx>
) -> Option<u64>
[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

pub fn eval_bits(
    &self,
    tcx: TyCtxt<'tcx>,
    param_env: ParamEnv<'tcx>,
    ty: Ty<'tcx>
) -> u128
[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Panics if the value cannot be evaluated or doesn't contain a valid integer of the given type.

pub fn eval_usize(&self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> u64[src]

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Panics if the value cannot be evaluated or doesn't contain a valid usize.

Trait Implementations

impl<'tcx> Borrow<Const<'tcx>> for Interned<'tcx, Const<'tcx>>[src]

impl<'tcx> Clone for Const<'tcx>[src]

impl<'tcx> Copy for Const<'tcx>[src]

impl<'tcx> Debug for Const<'tcx>[src]

impl<'tcx> Decodable for Const<'tcx>[src]

impl<'tcx> Display for &'tcx Const<'tcx>[src]

impl<'tcx> Encodable for Const<'tcx>[src]

impl<'tcx> Eq for Const<'tcx>[src]

impl<'tcx> EqUnifyValue for &'tcx Const<'tcx>[src]

impl<'tcx> From<&'tcx Const<'tcx>> for GenericArg<'tcx>[src]

impl<'tcx> Hash for Const<'tcx>[src]

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for Const<'tcx>[src]

impl<'tcx> Key for &'tcx Const<'tcx>[src]

type CacheSelector = DefaultCacheSelector

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

impl<'a, 'tcx> Lift<'tcx> for &'a Const<'a>[src]

type Lifted = &'tcx Const<'tcx>

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

impl<'tcx> Ord for Const<'tcx>[src]

impl<'tcx> PartialEq<Const<'tcx>> for Const<'tcx>[src]

impl<'tcx> PartialOrd<Const<'tcx>> for Const<'tcx>[src]

impl<'tcx, P: Printer<'tcx>> Print<'tcx, P> for &'tcx Const<'tcx>[src]

type Output = P::Const

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

type Error = P::Error

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

impl<'tcx> Relate<'tcx> for &'tcx Const<'tcx>[src]

impl<'_x, '_y, 'a, 'tcx> SpecializedDecoder<&'_x Const<'_y>> for CacheDecoder<'a, 'tcx> where
    &'_x Const<'_y>: UseSpecializedDecodable
[src]

impl<'tcx> StructuralEq for Const<'tcx>[src]

impl<'tcx> StructuralPartialEq for Const<'tcx>[src]

impl<'tcx> TypeFoldable<'tcx> for &'tcx Const<'tcx>[src]

Auto Trait Implementations

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

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

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

impl<'tcx> Unpin for Const<'tcx>

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

Blanket Implementations

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

impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where
    T: Copy
[src]

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

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

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

impl<T> Cast for T

impl<T> Decodable for T where
    T: UseSpecializedDecodable
[src]

impl<Ctxt, T> DepNodeParams<Ctxt> for T where
    Ctxt: DepContext,
    T: HashStable<<Ctxt as DepContext>::StableHashingContext> + Debug
[src]

impl<T> Encodable for T where
    T: UseSpecializedEncodable + ?Sized
[src]

impl<Q, K> Equivalent<K> for Q where
    K: Borrow<Q> + ?Sized,
    Q: Eq + ?Sized
[src]

impl<T> Erased for T[src]

impl<T> From<T> for T[src]

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

impl<T> MaybeResult<T> for T[src]

type Error = !

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

impl<T> Same<T> for T

type Output = T

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

Should always be Self

impl<E> SpecializationError for E[src]

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

type Owned = T

The resulting type after obtaining ownership.

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

type Error = Infallible

The type returned in the event of a conversion error.

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

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

The type returned in the event of a conversion error.

impl<T> WithConstness for T[src]