Struct rustc_hir::hir::Let

pub struct Let<'hir> {
    pub hir_id: HirId,
    pub span: Span,
    pub pat: &'hir Pat<'hir>,
    pub ty: Option<&'hir Ty<'hir>>,
    pub init: &'hir Expr<'hir>,
}

Represents a let <pat>[: <ty>] = <expr> expression (not a Local), occurring in an if-let or let-else, evaluating to a boolean. Typically the pattern is refutable.

In an if-let, imagine it as if (let <pat> = <expr>) { ... }; in a let-else, it is part of the desugaring to if-let. Only let-else supports the type annotation at present.

Fields

hir_id: HirId

span: Span

pat: &'hir Pat<'hir>

ty: Option<&'hir Ty<'hir>>

init: &'hir Expr<'hir>

Trait Implementations

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

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

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

impl<'hir> Debug for Let<'hir>

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

Formats the value using the given formatter.

impl<'hir, __CTX> HashStable<__CTX> for Let<'hir>where __CTX: HashStableContext,

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

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: 40 bytes