Struct rustc_hir::hir::Expr

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pub struct Expr<'hir> {
    pub hir_id: HirId,
    pub kind: ExprKind<'hir>,
    pub span: Span,
}
Expand description

An expression.

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§hir_id: HirId§kind: ExprKind<'hir>§span: Span

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impl Expr<'_>

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pub fn precedence(&self) -> ExprPrecedence

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pub fn is_syntactic_place_expr(&self) -> bool

Whether this looks like a place expr, without checking for deref adjustments. This will return true in some potentially surprising cases such as CONSTANT.field.

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pub fn is_place_expr( &self, allow_projections_from: impl FnMut(&Self) -> bool ) -> bool

Whether this is a place expression.

allow_projections_from should return true if indexing a field or index expression based on the given expression should be considered a place expression.

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pub fn peel_drop_temps(&self) -> &Self

If Self.kind is ExprKind::DropTemps(expr), drill down until we get a non-DropTemps Expr. This is used in suggestions to ignore this ExprKind as it is semantically silent, only signaling the ownership system. By doing this, suggestions that check the ExprKind of any given Expr for presentation don’t have to care about DropTemps beyond remembering to call this function before doing analysis on it.

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pub fn peel_blocks(&self) -> &Self

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pub fn peel_borrows(&self) -> &Self

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pub fn can_have_side_effects(&self) -> bool

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pub fn is_approximately_pattern(&self) -> bool

To a first-order approximation, is this a pattern?

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pub fn method_ident(&self) -> Option<Ident>

Trait Implementations§

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impl<'tcx> ArenaAllocatable<'tcx, IsNotCopy> for Expr<'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 Expr<'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 Expr<'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 Expr<'hir>

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

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

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impl<'hir> Unpin for Expr<'hir>

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impl<'hir> UnwindSafe for Expr<'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: 64 bytes