Struct rustc_hir::hir::Arm

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pub struct Arm<'hir> {
    pub hir_id: HirId,
    pub span: Span,
    pub pat: &'hir Pat<'hir>,
    pub guard: Option<Guard<'hir>>,
    pub body: &'hir Expr<'hir>,
}
Expand description

Represents a single arm of a match expression, e.g. <pat> (if <guard>) => <body>.

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§hir_id: HirId§span: Span§pat: &'hir Pat<'hir>

If this pattern and the optional guard matches, then body is evaluated.

§guard: Option<Guard<'hir>>

Optional guard clause.

§body: &'hir Expr<'hir>

The expression the arm evaluates to if this arm matches.

Trait Implementations§

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impl<'tcx> ArenaAllocatable<'tcx, IsNotCopy> for Arm<'tcx>

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fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut Self

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fn allocate_from_iter<'a>(
    arena: &'a Arena<'tcx>,
    iter: impl IntoIterator<Item = Self>
) -> &'a mut [Self]

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impl<'hir> Debug for Arm<'hir>

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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<'hir, __CTX> HashStable<__CTX> for Arm<'hir>where
    __CTX: HashStableContext,

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fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

Auto Trait Implementations§

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impl<'hir> RefUnwindSafe for Arm<'hir>

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impl<'hir> !Send for Arm<'hir>

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impl<'hir> !Sync for Arm<'hir>

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impl<'hir> Unpin for Arm<'hir>

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impl<'hir> UnwindSafe for Arm<'hir>

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, 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: 48 bytes