Skip to main content

## ExpressionId

# Struct ExpressionId

Source

    pub struct ExpressionId {
        private_use_as_methods_instead: u32 is 0..=4294967040,
    }

Expand description

ID of a coverage-counter expression. Values ascend from 0.

Before MIR inlining, expression IDs are local to their enclosing function. After MIR inlining, coverage statements may have been inlined into another function, so use the statement’s source-scope to find which function/instance its IDs are meaningful for.

Note that LLVM handles expression IDs as `uint32_t`, so there is no need to use a larger representation on the Rust side.

## Fields§

§`private_use_as_methods_instead: u32 is 0..=4294967040`

## Implementations§

Source§

### impl ExpressionId

Source

#### pub const MAX_AS_U32: u32 = 4294967040

Maximum value the index can take, as a `u32`.

Source

#### pub const MAX: Self

Maximum value the index can take.

Source

#### pub const ZERO: Self

Zero value of the index.

Source

#### pub const fn from_usize(value: usize) -> Self

Creates a new index from a given `usize`.

##### §Panics

Will panic if `value` exceeds `MAX`.

Source

#### pub const fn from_u32(value: u32) -> Self

Creates a new index from a given `u32`.

##### §Panics

Will panic if `value` exceeds `MAX`.

Source

#### pub const fn from_u16(value: u16) -> Self

Creates a new index from a given `u16`.

##### §Panics

Will panic if `value` exceeds `MAX`.

Source

#### pub const unsafe fn from_u32_unchecked(value: u32) -> Self

Creates a new index from a given `u32`.

##### §Safety

The provided value must be less than or equal to the maximum value for the newtype. Providing a value outside this range is undefined due to layout restrictions.

Prefer using `from_u32`.

Source

#### pub const fn index(self) -> usize

Extracts the value of this index as a `usize`.

Source

#### pub const fn as_u32(self) -> u32

Extracts the value of this index as a `u32`.

Source

#### pub const fn as_usize(self) -> usize

Extracts the value of this index as a `usize`.

## Trait Implementations§

Source§

### impl Add<usize> for ExpressionId

Source§

#### type Output = ExpressionId

The resulting type after applying the `+` operator.
Source§

#### fn add(self, other: usize) -> Self

Performs the `+` operation. Read more
Source§

### impl AddAssign<usize> for ExpressionId

Source§

#### fn add_assign(&mut self, other: usize)

Performs the `+=` operation. Read more
Source§

### impl Clone for ExpressionId

Source§

#### fn clone(&self) -> ExpressionId

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from `source`. Read more
Source§

### impl Copy for ExpressionId

Source§

### impl Debug for ExpressionId

Source§

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

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

### impl<D: Decoder> Decodable<D> for ExpressionId

Source§

#### fn decode(d: &mut D) -> Self

Source§

### impl<E: Encoder> Encodable<E> for ExpressionId

Source§

#### fn encode(&self, e: &mut E)

Source§

### impl Eq for ExpressionId

Source§

### impl From<ExpressionId> for u32

Source§

#### fn from(v: ExpressionId) -> u32

Converts to this type from the input type.
Source§

### impl From<ExpressionId> for usize

Source§

#### fn from(v: ExpressionId) -> usize

Converts to this type from the input type.
Source§

### impl From<u32> for ExpressionId

Source§

#### fn from(value: u32) -> Self

Converts to this type from the input type.
Source§

### impl From<usize> for ExpressionId

Source§

#### fn from(value: usize) -> Self

Converts to this type from the input type.
Source§

### impl Hash for ExpressionId

Source§

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

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 Idx for ExpressionId

Source§

#### fn new(value: usize) -> Self

Source§

#### fn index(self) -> usize

Source§

#### fn increment_by(&mut self, amount: usize)

Source§

#### fn plus(self, amount: usize) -> Self

Source§

### impl Ord for ExpressionId

Source§

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

This method returns an `Ordering` between `self` and `other`. Read more
1.21.0 (const: unstable) · Source§

#### fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 (const: unstable) · Source§

#### fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 (const: unstable) · Source§

#### fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more
Source§

### impl PartialEq for ExpressionId

Source§

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

Equality operator `==`. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator `!=`. Read more
Source§

### impl PartialOrd for ExpressionId

Source§

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

This method returns an ordering between `self` and `other` values if one exists. Read more
1.0.0 (const: unstable) · Source§

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

Tests less than (for `self` and `other`) and is used by the `<` operator. Read more
1.0.0 (const: unstable) · Source§

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

Tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more
1.0.0 (const: unstable) · Source§

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

Tests greater than (for `self` and `other`) and is used by the `>` operator. Read more
1.0.0 (const: unstable) · Source§

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

Tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more
Source§

### impl StableHash for ExpressionId

Source§

#### fn stable_hash<__Hcx: StableHashCtxt>( &self, hcx: &mut __Hcx, hasher: &mut StableHasher, )

Source§

### impl Step for ExpressionId

Source§

#### fn steps_between(start: &Self, end: &Self) -> (usize, Option<usize>)

🔬This is a nightly-only experimental API. (`step_trait`)
Returns the bounds on the number of successor steps required to get from `start` to `end` like `Iterator::size_hint()`. Read more
Source§

#### fn forward_checked(start: Self, u: usize) -> Option<Self>

🔬This is a nightly-only experimental API. (`step_trait`)
Returns the value that would be obtained by taking the successor of `self` `count` times. Read more
Source§

#### fn backward_checked(start: Self, u: usize) -> Option<Self>

🔬This is a nightly-only experimental API. (`step_trait`)
Returns the value that would be obtained by taking the predecessor of `self` `count` times. Read more
Source§

#### fn forward_overflowing(start: Self, u: usize) -> (Self, bool)

🔬This is a nightly-only experimental API. (`step_trait`)
Returns the value that would be obtained by taking the successor of `self` `count` times along with a boolean tracking whether overflow occurred. Read more
Source§

#### fn backward_overflowing(start: Self, u: usize) -> (Self, bool)

🔬This is a nightly-only experimental API. (`step_trait`)
Returns the value that would be obtained by taking the successor of `self` `count` times along with a boolean tracking whether overflow occurred. Read more
Source§

#### fn forward(start: Self, count: usize) -> Self

🔬This is a nightly-only experimental API. (`step_trait`)
Returns the value that would be obtained by taking the successor of `self` `count` times. Read more
Source§

#### unsafe fn forward_unchecked(start: Self, count: usize) -> Self

🔬This is a nightly-only experimental API. (`step_trait`)
Returns the value that would be obtained by taking the successor of `self` `count` times. Read more
Source§

#### fn backward(start: Self, count: usize) -> Self

🔬This is a nightly-only experimental API. (`step_trait`)
Returns the value that would be obtained by taking the predecessor of `self` `count` times. Read more
Source§

#### unsafe fn backward_unchecked(start: Self, count: usize) -> Self

🔬This is a nightly-only experimental API. (`step_trait`)
Returns the value that would be obtained by taking the predecessor of `self` `count` times. Read more
Source§

### impl StructuralPartialEq for ExpressionId

## Auto Trait Implementations§

§

### impl DynSend for ExpressionId

§

### impl DynSync for ExpressionId

§

### impl Freeze for ExpressionId

§

### impl RefUnwindSafe for ExpressionId

§

### impl Send for ExpressionId

§

### impl Sync for ExpressionId

§

### impl Unpin for ExpressionId

§

### impl UnsafeUnpin for ExpressionId

§

### impl UnwindSafe for ExpressionId

## Blanket Implementations§

Source§

### impl<T> Aligned for T

Source§

#### const ALIGN: Alignment

Alignment of `Self`.
Source§

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

Source§

#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
Source§

### impl<T> AnyEq for T
where T: Any + PartialEq,

Source§

#### fn equals(&self, other: &(dyn Any + 'static)) -> bool

Source§

#### fn as_any(&self) -> &(dyn Any + 'static)

Source§

### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

Source§

#### fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

Source§

#### fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

Source§

### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

Source§

#### fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

Source§

#### fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

Source§

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

Source§

#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

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

Source§

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

Mutably borrows from an owned value. Read more
Source§

### impl<T> CloneToUninit for T
where T: Clone,

Source§

#### unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. Read more
Source§

### impl<T, R> CollectAndApply<T, R> for T

Source§

#### fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to `f(&iter.collect::<Vec<_>>())`.

Source§

#### type Output = R

Source§

### impl<Q, K> Comparable<K> for Q
where Q: Ord + ?Sized, K: Borrow<Q> + ?Sized,

Source§

#### fn compare(&self, key: &K) -> Ordering

Compare self to `key` and return their ordering.
Source§

### impl<'tcx, T> DepNodeKey<'tcx> for T
where T: StableHash + Debug,

Source§

#### default fn key_fingerprint_style() -> KeyFingerprintStyle

Source§

#### default fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

This method turns a query key into an opaque `Fingerprint` to be used in `DepNode`.
Source§

#### default fn try_recover_key(_: TyCtxt<'tcx>, _: &DepNode) -> Option<T>

This method tries to recover the query key from the given `DepNode`, something which is needed when forcing `DepNode`s during red-green evaluation. The query system will only call this method if `fingerprint_style()` is not `FingerprintStyle::Opaque`. It is always valid to return `None` here, in which case incremental compilation will treat the query as having changed instead of forcing it.
Source§

### impl<T> DynClone for T
where T: Clone,

Source§

#### fn __clone_box(&self, _: Private) -> *mut ()

Source§

### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

Source§

#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
Source§

### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

Source§

#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
Source§

### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

Source§

#### fn equivalent(&self, key: &K) -> bool

Compare self to `key` and return `true` if they are equal.
Source§

### impl<T> ErasedDestructor for T
where T: 'static,

Source§

### impl<T> From<T> for T

Source§

#### fn from(t: T) -> T

Returns the argument unchanged.

Source§

### impl<T> Instrument for T

Source§

#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more
Source§

#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
Source§

### impl<T, U> Into<U> for T
where 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> IntoEither for T

Source§

#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left` is `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
Source§

#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left(&self)` returns `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
Source§

### impl<K> IntoQueryKey<K> for K

Source§

#### fn into_query_key(self) -> K

Argument conversion from `Self` to `K`. This should always be a very cheap conversion, e.g. `LocalDefId::to_def_id`.
Source§

### impl<I, T> IntoSliceIdx<I, [T]> for I
where I: Idx,

Source§

#### type Output = usize

Source§

#### fn into_slice_idx(self) -> <I as IntoSliceIdx<I, [T]>>::Output

Source§

### impl<T> MaybeResult<T> for T

Source§

#### type Error = !

Source§

#### fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

Source§

#### fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

Source§

### impl<T> Pointable for T

Source§

#### const ALIGN: usize

The alignment of pointer.
Source§

#### type Init = T

The type for initializers.
Source§

#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
Source§

#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
Source§

#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
Source§

#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
Source§

### impl<T> Same for T

Source§

#### type Output = T

Should always be `Self`
Source§

### impl<T> ToOwned for T
where T: Clone,

Source§

#### 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 T
where U: Into<T>,

Source§

#### 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 T
where U: TryFrom<T>,

Source§

#### 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.
Source§

### impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

Source§

#### fn upcast(self, interner: I) -> U

Source§

### impl<I, T> UpcastFrom<I, T> for T

Source§

#### fn upcast_from(from: T, _tcx: I) -> T

Source§

### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

Source§

#### fn vzip(self) -> V

Source§

### impl<T> WithSubscriber for T

Source§

#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
Source§

#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more

## 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: 4 bytes