pub struct Block<'hir> {
pub stmts: &'hir [Stmt<'hir>],
pub expr: Option<&'hir Expr<'hir>>,
pub hir_id: HirId,
pub rules: BlockCheckMode,
pub span: Span,
pub targeted_by_break: bool,
}
Expand description
A block of statements { .. }
, which may have a label (in this case the
targeted_by_break
field will be true
) and may be unsafe
by means of
the rules
being anything but DefaultBlock
.
Fields§
§stmts: &'hir [Stmt<'hir>]
Statements in a block.
expr: Option<&'hir Expr<'hir>>
An expression at the end of the block without a semicolon, if any.
hir_id: HirId
§rules: BlockCheckMode
Distinguishes between unsafe { ... }
and { ... }
.
span: Span
§targeted_by_break: bool
If true, then there may exist break 'a
values that aim to
break out of this block early.
Used by 'label: {}
blocks and by try {}
blocks.
Implementations§
Trait Implementations§
source§impl<'hir, __CTX> HashStable<__CTX> for Block<'hir>where
__CTX: HashStableContext,
impl<'hir, __CTX> HashStable<__CTX> for Block<'hir>where __CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
impl<'hir> Copy for Block<'hir>
Auto Trait Implementations§
impl<'hir> RefUnwindSafe for Block<'hir>
impl<'hir> !Send for Block<'hir>
impl<'hir> !Sync for Block<'hir>
impl<'hir> Unpin for Block<'hir>
impl<'hir> UnwindSafe for Block<'hir>
Blanket Implementations§
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
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