Struct rustc_span::hygiene::ExpnId

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pub struct ExpnId {
    pub krate: CrateNum,
    pub local_id: ExpnIndex,
}
Expand description

A unique ID associated with a macro invocation and expansion.

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§krate: CrateNum§local_id: ExpnIndex

Implementations§

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impl ExpnId

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pub const fn root() -> ExpnId

The ID of the theoretical expansion that generates freshly parsed, unexpanded AST. Invariant: we do not create any ExpnId with local_id == 0 and krate != 0.

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pub fn expn_hash(self) -> ExpnHash

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pub fn from_hash(hash: ExpnHash) -> Option<ExpnId>

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pub fn as_local(self) -> Option<LocalExpnId>

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pub fn expect_local(self) -> LocalExpnId

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pub fn expn_data(self) -> ExpnData

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pub fn is_descendant_of(self, ancestor: ExpnId) -> bool

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pub fn outer_expn_is_descendant_of(self, ctxt: SyntaxContext) -> bool

expn_id.outer_expn_is_descendant_of(ctxt) is equivalent to but faster than expn_id.is_descendant_of(ctxt.outer_expn()).

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pub fn expansion_cause(self) -> Option<Span>

Returns span for the macro which originally caused this expansion to happen.

Stops backtracing at include! boundary.

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impl Clone for ExpnId

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fn clone(&self) -> ExpnId

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 ExpnId

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

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

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default fn decode(_: &mut D) -> Self

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

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default fn encode(&self, _: &mut E)

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impl Hash for ExpnId

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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: HashStableContext> HashStable<CTX> for ExpnId

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fn hash_stable(&self, ctx: &mut CTX, hasher: &mut StableHasher)

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impl PartialEq<ExpnId> for ExpnId

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fn eq(&self, other: &ExpnId) -> 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 Copy for ExpnId

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impl Eq for ExpnId

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impl StructuralEq for ExpnId

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impl StructuralPartialEq for ExpnId

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source§

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · 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.

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impl<T> ToOwned for Twhere
T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

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

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,

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

The type returned in the event of a conversion error.
const: unstable · 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: 8 bytes