Struct rustc_hir_typeck::upvar::InferBorrowKind
source · struct InferBorrowKind<'tcx> {
closure_def_id: LocalDefId,
capture_information: Vec<(Place<'tcx>, CaptureInfo)>,
fake_reads: Vec<(Place<'tcx>, FakeReadCause, HirId)>,
}
Fields§
§closure_def_id: LocalDefId
§capture_information: Vec<(Place<'tcx>, CaptureInfo)>
For each Place that is captured by the closure, we track the minimal kind of access we need (ref, ref mut, move, etc) and the expression that resulted in such access.
Consider closure where s.str1 is captured via an ImmutableBorrow and s.str2 via a MutableBorrow
struct SomeStruct { str1: String, str2: String };
// Assume that the HirId for the variable definition is `V1`
let mut s = SomeStruct { str1: format!("s1"), str2: format!("s2") };
let fix_s = |new_s2| {
// Assume that the HirId for the expression `s.str1` is `E1`
println!("Updating SomeStruct with str1={0}", s.str1);
// Assume that the HirId for the expression `*s.str2` is `E2`
s.str2 = new_s2;
};
For closure fix_s
, (at a high level) the map contains
ⓘ
Place { V1, [ProjectionKind::Field(Index=0, Variant=0)] } : CaptureKind { E1, ImmutableBorrow }
Place { V1, [ProjectionKind::Field(Index=1, Variant=0)] } : CaptureKind { E2, MutableBorrow }
fake_reads: Vec<(Place<'tcx>, FakeReadCause, HirId)>
Trait Implementations§
source§impl<'tcx> Delegate<'tcx> for InferBorrowKind<'tcx>
impl<'tcx> Delegate<'tcx> for InferBorrowKind<'tcx>
source§fn fake_read(
&mut self,
place: &PlaceWithHirId<'tcx>,
cause: FakeReadCause,
diag_expr_id: HirId
)
fn fake_read( &mut self, place: &PlaceWithHirId<'tcx>, cause: FakeReadCause, diag_expr_id: HirId )
The
place
should be a fake read because of specified cause
.source§fn consume(&mut self, place_with_id: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)
fn consume(&mut self, place_with_id: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)
The value found at
place
is moved, depending
on mode
. Where diag_expr_id
is the id used for diagnostics for place
. Read moresource§fn borrow(
&mut self,
place_with_id: &PlaceWithHirId<'tcx>,
diag_expr_id: HirId,
bk: BorrowKind
)
fn borrow( &mut self, place_with_id: &PlaceWithHirId<'tcx>, diag_expr_id: HirId, bk: BorrowKind )
The value found at
place
is being borrowed with kind bk
.
diag_expr_id
is the id used for diagnostics (see consume
for more details).source§fn mutate(&mut self, assignee_place: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)
fn mutate(&mut self, assignee_place: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)
The path at
assignee_place
is being assigned to.
diag_expr_id
is the id used for diagnostics (see consume
for more details).source§fn copy(&mut self, place_with_id: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)
fn copy(&mut self, place_with_id: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)
The value found at
place
is being copied.
diag_expr_id
is the id used for diagnostics (see consume
for more details).Auto Trait Implementations§
impl<'tcx> !RefUnwindSafe for InferBorrowKind<'tcx>
impl<'tcx> Send for InferBorrowKind<'tcx>
impl<'tcx> Sync for InferBorrowKind<'tcx>
impl<'tcx> Unpin for InferBorrowKind<'tcx>
impl<'tcx> !UnwindSafe for InferBorrowKind<'tcx>
Blanket Implementations§
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: 56 bytes