pub enum Constant<'tcx> {
Show 14 variants Adt(Const<'tcx>), Str(String), Binary(Lrc<[u8]>), Char(char), Int(u128), F32(f32), F64(f64), Bool(bool), Vec(Vec<Constant<'tcx>>), Repeat(Box<Constant<'tcx>>, u64), Tuple(Vec<Constant<'tcx>>), RawPtr(u128), Ref(Box<Constant<'tcx>>), Err,
}
Expand description

A LitKind-like enum to fold constant Exprs into.

Variants§

§

Adt(Const<'tcx>)

§

Str(String)

A String (e.g., “abc”).

§

Binary(Lrc<[u8]>)

A binary string (e.g., b"abc").

§

Char(char)

A single char (e.g., 'a').

§

Int(u128)

An integer’s bit representation.

§

F32(f32)

An f32.

§

F64(f64)

An f64.

§

Bool(bool)

true or false.

§

Vec(Vec<Constant<'tcx>>)

An array of constants.

§

Repeat(Box<Constant<'tcx>>, u64)

Also an array, but with only one constant, repeated N times.

§

Tuple(Vec<Constant<'tcx>>)

A tuple of constants.

§

RawPtr(u128)

A raw pointer.

§

Ref(Box<Constant<'tcx>>)

A reference

§

Err

A literal with syntax error.

Implementations§

source§

impl<'tcx> Constant<'tcx>

source

pub fn partial_cmp( tcx: TyCtxt<'_>, cmp_type: Ty<'_>, left: &Self, right: &Self ) -> Option<Ordering>

source

pub fn int_value( &self, cx: &LateContext<'_>, val_type: Ty<'_> ) -> Option<FullInt>

Returns the integer value or None if self or val_type is not integer type.

source

pub fn peel_refs(self) -> Self

Trait Implementations§

source§

impl<'tcx> Clone for Constant<'tcx>

source§

fn clone(&self) -> Constant<'tcx>

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl<'tcx> Debug for Constant<'tcx>

source§

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

Formats the value using the given formatter. Read more
source§

impl<'tcx> Hash for Constant<'tcx>

source§

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

Feeds this value into the given Hasher. Read more
1.3.0 · source§

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

Feeds a slice of this type into the given Hasher. Read more
source§

impl<'tcx> PartialEq<Constant<'tcx>> for Constant<'tcx>

source§

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

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

Auto Trait Implementations§

§

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

§

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

§

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

§

impl<'tcx> Unpin for Constant<'tcx>

§

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

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for Twhere T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for Twhere T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> ToOwned for Twhere T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

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

fn clone_into(&self, target: &mut T)

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

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

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

§

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

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 48 bytes

Size for each variant:

  • Adt: 40 bytes
  • Str: 32 bytes
  • Binary: 24 bytes
  • Char: 12 bytes
  • Int: 32 bytes
  • F32: 12 bytes
  • F64: 16 bytes
  • Bool: 9 bytes
  • Vec: 32 bytes
  • Repeat: 24 bytes
  • Tuple: 32 bytes
  • RawPtr: 32 bytes
  • Ref: 16 bytes
  • Err: 0 bytes