Struct rustc_middle::mir::coverage::ExpressionOperandId

pub struct ExpressionOperandId {
    private: u32,
}

An ExpressionOperandId value is assigned directly from either a CounterValueReference.as_u32() (which ascend from 1) or an ExpressionOperandId.as_u32() (which descend from u32::MAX). Id value 0 (zero) represents a virtual counter with a constant value of 0.

Fields

private: u32

Implementations

impl ExpressionOperandId

pub const MAX_AS_U32: u32

pub const MAX: Self

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

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

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

pub const fn index(self) -> usize

Extracts the value of this index as an integer.

pub const fn as_u32(self) -> u32

Extracts the value of this index as a u32.

pub const fn as_usize(self) -> usize

Extracts the value of this index as a usize.

impl ExpressionOperandId

pub const ZERO: Self

An expression operand for a “zero counter”, as described in the following references:

• https://github.com/rust-lang/llvm-project/blob/rustc/11.0-2020-10-12/llvm/docs/CoverageMappingFormat.rst#counter
• https://github.com/rust-lang/llvm-project/blob/rustc/11.0-2020-10-12/llvm/docs/CoverageMappingFormat.rst#tag
• https://github.com/rust-lang/llvm-project/blob/rustc/11.0-2020-10-12/llvm/docs/CoverageMappingFormat.rst#counter-expressions

This operand can be used to count two or more separate code regions with a single counter, if they run sequentially with no branches, by injecting the Counter in a BasicBlock for one of the code regions, and inserting CounterExpressions (“add ZERO to the counter”) in the coverage map for the other code regions.

Trait Implementations

impl Add<usize> for ExpressionOperandId

type Output = Self

The resulting type after applying the + operator.

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

Performs the + operation.

impl Clone for ExpressionOperandId

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for ExpressionOperandId

impl Debug for ExpressionOperandId

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

Formats the value using the given formatter.

impl<D: Decoder> Decodable<D> for ExpressionOperandId

fn decode(d: &mut D) -> Result<Self, D::Error>

impl<E: Encoder> Encodable<E> for ExpressionOperandId

fn encode(&self, e: &mut E) -> Result<(), E::Error>

impl Eq for ExpressionOperandId

impl From<CounterValueReference> for ExpressionOperandId

fn from(v: CounterValueReference) -> ExpressionOperandId

Performs the conversion.

impl From<InjectedExpressionId> for ExpressionOperandId

fn from(v: InjectedExpressionId) -> ExpressionOperandId

Performs the conversion.

impl From<u32> for ExpressionOperandId

fn from(value: u32) -> Self

Performs the conversion.

impl From<usize> for ExpressionOperandId

fn from(value: usize) -> Self

Performs the conversion.

impl Hash for ExpressionOperandId

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for ExpressionOperandId

fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

impl Idx for ExpressionOperandId

fn new(value: usize) -> Self

fn index(self) -> usize

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

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

impl<'tcx> Lift<'tcx> for ExpressionOperandId

type Lifted = Self

fn lift_to_tcx(self, _: TyCtxt<'tcx>) -> Option<Self>

impl Ord for ExpressionOperandId

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

This method returns an Ordering between self and other.

#[must_use]

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

Compares and returns the maximum of two values.

#[must_use]

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

Compares and returns the minimum of two values.

#[must_use]

pub fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<ExpressionOperandId> for ExpressionOperandId

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

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

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

This method tests for !=.

impl PartialOrd<ExpressionOperandId> for ExpressionOperandId

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

impl Step for ExpressionOperandId

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

🔬 This is a nightly-only experimental API. (step_trait)

recently redesigned

Returns the number of successor steps required to get from start to end.

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

🔬 This is a nightly-only experimental API. (step_trait_ext)

recently added

Returns the value that would be obtained by taking the successor of self count times.

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

🔬 This is a nightly-only experimental API. (step_trait_ext)

recently added

Returns the value that would be obtained by taking the predecessor of self count times.

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

🔬 This is a nightly-only experimental API. (step_trait_ext)

recently added

Returns the value that would be obtained by taking the successor of self count times.

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

🔬 This is a nightly-only experimental API. (unchecked_math)

niche optimization path

Returns the value that would be obtained by taking the successor of self count times.

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

🔬 This is a nightly-only experimental API. (step_trait_ext)

recently added

Returns the value that would be obtained by taking the predecessor of self count times.

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

🔬 This is a nightly-only experimental API. (unchecked_math)

niche optimization path

Returns the value that would be obtained by taking the predecessor of self count times.

impl StructuralEq for ExpressionOperandId

impl StructuralPartialEq for ExpressionOperandId

impl<'tcx> TypeFoldable<'tcx> for ExpressionOperandId

fn super_fold_with<F: TypeFolder<'tcx>>(self, _: &mut F) -> ExpressionOperandId

fn super_visit_with<F: TypeVisitor<'tcx>>(
    &self,
    _: &mut F
) -> ControlFlow<F::BreakTy>

fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self

fn visit_with<V: TypeVisitor<'tcx>>(
    &self,
    visitor: &mut V
) -> ControlFlow<V::BreakTy>

fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool

Returns true if self has any late-bound regions that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound regions that appear free.

fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool

Returns true if this self has any regions that escape binder (and hence are not bound by it).

fn has_escaping_bound_vars(&self) -> bool

fn has_type_flags(&self, flags: TypeFlags) -> bool

fn has_projections(&self) -> bool

fn has_opaque_types(&self) -> bool

fn references_error(&self) -> bool

fn has_param_types_or_consts(&self) -> bool

fn has_infer_regions(&self) -> bool

fn has_infer_types(&self) -> bool

fn has_infer_types_or_consts(&self) -> bool

fn needs_infer(&self) -> bool

fn has_placeholders(&self) -> bool

fn needs_subst(&self) -> bool

fn has_free_regions(&self) -> bool

“Free” regions in this context means that it has any region that is not (a) erased or (b) late-bound.

fn has_erased_regions(&self) -> bool

fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

fn is_global(&self) -> bool

Indicates whether this value references only ‘global’ generic parameters that are the same regardless of what fn we are in. This is used for caching.

fn has_late_bound_regions(&self) -> bool

True if there are any late-bound regions

fn still_further_specializable(&self) -> bool

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization.