Struct rustc_middle::middle::region::FirstStatementIndex

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pub struct FirstStatementIndex {
    private_use_as_methods_instead: u32,
}
Expand description

Represents a subscope of block for a binding that is introduced by block.stmts[first_statement_index]. Such subscopes represent a suffix of the block. Note that each subscope does not include the initializer expression, if any, for the statement indexed by first_statement_index.

For example, given { let (a, b) = EXPR_1; let c = EXPR_2; ... }:

  • The subscope with first_statement_index == 0 is scope of both a and b; it does not include EXPR_1, but does include everything after that first let. (If you want a scope that includes EXPR_1 as well, then do not use Scope::Remainder, but instead another Scope that encompasses the whole block, e.g., Scope::Node.

  • The subscope with first_statement_index == 1 is scope of c, and thus does not include EXPR_2, but covers the ....

Fields§

§private_use_as_methods_instead: u32

Implementations§

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impl FirstStatementIndex

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pub const MAX_AS_U32: u32 = 4_294_967_040u32

Maximum value the index can take, as a u32.

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pub const MAX: Self = _

Maximum value the index can take.

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pub const ZERO: Self = _

Zero value of the index.

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

Creates a new index from a given usize.

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Will panic if value exceeds MAX.

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

Creates a new index from a given u32.

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Will panic if value exceeds MAX.

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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.

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pub const fn index(self) -> usize

Extracts the value of this index as a usize.

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pub const fn as_u32(self) -> u32

Extracts the value of this index as a u32.

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pub const fn as_usize(self) -> usize

Extracts the value of this index as a usize.

Trait Implementations§

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impl Add<usize> for FirstStatementIndex

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type Output = FirstStatementIndex

The resulting type after applying the + operator.
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fn add(self, other: usize) -> Self

Performs the + operation. Read more
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impl Clone for FirstStatementIndex

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fn clone(&self) -> FirstStatementIndex

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for FirstStatementIndex

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

Formats the value using the given formatter. Read more
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impl<D: Decoder> Decodable<D> for FirstStatementIndex

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

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

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

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impl From<FirstStatementIndex> for u32

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fn from(v: FirstStatementIndex) -> u32

Converts to this type from the input type.
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impl From<FirstStatementIndex> for usize

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fn from(v: FirstStatementIndex) -> usize

Converts to this type from the input type.
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impl From<u32> for FirstStatementIndex

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fn from(value: u32) -> Self

Converts to this type from the input type.
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impl From<usize> for FirstStatementIndex

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fn from(value: usize) -> Self

Converts to this type from the input type.
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impl Hash for FirstStatementIndex

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

Feeds this value into the given Hasher. Read more
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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
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impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for FirstStatementIndex

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

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impl Idx for FirstStatementIndex

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fn new(value: usize) -> Self

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fn index(self) -> usize

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fn increment_by(&mut self, amount: usize)

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

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impl Ord for FirstStatementIndex

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

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for FirstStatementIndex

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

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

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

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

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

🔬This is a nightly-only experimental API. (step_trait)
Returns the number of successor steps required to get from start to end. Read more
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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
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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
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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
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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
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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
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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
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impl Copy for FirstStatementIndex

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impl Eq for FirstStatementIndex

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impl StructuralPartialEq for FirstStatementIndex

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impl TrustedStep for FirstStatementIndex

Auto Trait Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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impl<T> AnyEq for T
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fn equals(&self, other: &(dyn Any + 'static)) -> bool

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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
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fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T

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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
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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<_>>()).

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type Output = R

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

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

Compare self to key and return their ordering.
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impl<Tcx, T> DepNodeParams<Tcx> for T
where Tcx: DepContext, T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

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default fn fingerprint_style() -> FingerprintStyle

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default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint

This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don’t need to if the corresponding DepNode is anonymous).
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default fn to_debug_str(&self, _: Tcx) -> String

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default fn recover(_: Tcx, _: &DepNode) -> Option<T>

This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes 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.
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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

Checks if this value is equivalent to the given key. Read more
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

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Calls U::from(self).

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where F: FnOnce(&Self) -> bool,

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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