[][src]Enum rustc_middle::mir::interpret::ConstValue

pub enum ConstValue<'tcx> {
    Slice {
        data: &'tcx Allocation,
        start: usize,
        end: usize,
    ByRef {
        alloc: &'tcx Allocation,
        offset: Size,

Represents a constant value in Rust. Scalar and Slice are optimizations for array length computations, enum discriminants and the pattern matching logic.



Used only for types with layout::abi::Scalar ABI and ZSTs.

Not using the enum Value to encode that this must not be Uninit.


Used only for &[u8] and &str

Fields of Slice

data: &'tcx Allocationstart: usizeend: usize

A value not represented/representable by Scalar or Slice

Fields of ByRef

alloc: &'tcx Allocation

The backing memory of the value, may contain more memory than needed for just the value in order to share Allocations between values

offset: Size

Offset into alloc


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

pub fn try_to_scalar(&self) -> Option<Scalar>[src]

pub fn try_to_str_slice(&self) -> Option<&'tcx str>[src]

pub fn try_to_bits(&self, size: Size) -> Option<u128>[src]

pub fn try_to_bool(&self) -> Option<bool>[src]

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

pub fn try_to_bits_for_ty(
    tcx: TyCtxt<'tcx>,
    param_env: ParamEnv<'tcx>,
    ty: Ty<'tcx>
) -> Option<u128>

pub fn from_bool(b: bool) -> Self[src]

pub fn from_u64(i: u64) -> Self[src]

pub fn from_machine_usize(i: u64, cx: &impl HasDataLayout) -> Self[src]

Trait Implementations

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

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

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

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

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

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

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

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

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

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

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

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

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

Auto Trait Implementations

impl<'tcx> RefUnwindSafe for ConstValue<'tcx>

impl<'tcx> Send for ConstValue<'tcx>

impl<'tcx> Sync for ConstValue<'tcx>

impl<'tcx> Unpin for ConstValue<'tcx>

impl<'tcx> UnwindSafe for ConstValue<'tcx>

Blanket Implementations

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

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

impl<T> Borrow<T> for T where
    T: ?Sized

impl<T> BorrowMut<T> for T where
    T: ?Sized

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

impl<T> Decodable for T where
    T: UseSpecializedDecodable

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

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

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

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

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

type Error = !

impl<T> ToOwned for T where
    T: Clone

type Owned = T

The resulting type after obtaining ownership.

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

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

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

The type returned in the event of a conversion error.

impl<T> WithConstness for T[src]