Enum rustc::mir::interpret::Scalar

pub enum Scalar {
    Bits {
        defined: u8,
        bits: u128,
    },
    Ptr(Pointer),
}

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A Scalar represents an immediate, primitive value existing outside of a memory::Allocation. It is in many ways like a small chunk of a Allocation, up to 8 bytes in size. Like a range of bytes in an Allocation, a Scalar can either represent the raw bytes of a simple value or a pointer into another Allocation

Variants

Bits

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The raw bytes of a simple value.

Fields of Bits

defined: u8	🔬 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? The first defined number of bits are valid
bits: u128	🔬 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?

Ptr(Pointer)

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A pointer into an Allocation. An Allocation in the memory module has a list of relocations, but a Scalar is only large enough to contain one, so we just represent the relocation and its associated offset together as a Pointer here.

Methods

impl<'tcx> Scalar

pub fn ptr_null<C: HasDataLayout>(cx: C) -> Self

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pub fn ptr_signed_offset<C: HasDataLayout>(     self,     i: i64,     cx: C ) -> EvalResult<'tcx, Self>

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pub fn ptr_offset<C: HasDataLayout>(     self,     i: Size,     cx: C ) -> EvalResult<'tcx, Self>

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pub fn ptr_wrapping_signed_offset<C: HasDataLayout>(     self,     i: i64,     cx: C ) -> EvalResult<'tcx, Self>

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pub fn is_null_ptr<C: HasDataLayout>(self, cx: C) -> EvalResult<'tcx, bool>

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pub fn to_value_with_len<C: HasDataLayout>(self, len: u64, cx: C) -> Value

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pub fn to_value_with_vtable(self, vtable: Pointer) -> Value

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pub fn to_value(self) -> Value

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impl<'tcx> Scalar

pub fn undef() -> Self

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pub fn from_bool(b: bool) -> Self

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pub fn from_char(c: char) -> Self

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pub fn to_bits(self, size: Size) -> EvalResult<'tcx, u128>

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pub fn to_ptr(self) -> EvalResult<'tcx, Pointer>

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pub fn is_bits(self) -> bool

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pub fn is_ptr(self) -> bool

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pub fn to_bool(self) -> EvalResult<'tcx, bool>

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Trait Implementations

impl<'a> HashStable<StableHashingContext<'a>> for Scalar

fn hash_stable<W: StableHasherResult>(     &self,     hcx: &mut StableHashingContext<'a>,     hasher: &mut StableHasher<W> )

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impl From<Pointer> for Scalar

fn from(ptr: Pointer) -> Self

Performs the conversion.

impl Clone for Scalar

fn clone(&self) -> Scalar

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Scalar

impl Debug for Scalar

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Eq for Scalar

fn assert_receiver_is_total_eq(&self)

impl PartialEq for Scalar

fn eq(&self, other: &Scalar) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Scalar) -> bool

This method tests for !=.

impl Ord for Scalar

fn cmp(&self, other: &Scalar) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl PartialOrd for Scalar

fn partial_cmp(&self, other: &Scalar) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Scalar) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Scalar) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Scalar) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Scalar) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Encodable for Scalar

fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>

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impl Decodable for Scalar

fn decode<__D: Decoder>(d: &mut __D) -> Result<Scalar, __D::Error>

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impl Hash for Scalar

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where     H: Hasher,

Feeds a slice of this type into the given [Hasher].