Struct clippy_utils::sugg::DerefDelegate

struct DerefDelegate<'a, 'tcx> {
    cx: &'a LateContext<'tcx>,
    closure_span: Span,
    closure_arg_is_type_annotated_double_ref: bool,
    next_pos: BytePos,
    suggestion_start: String,
    applicability: Applicability,
}

Visitor struct used for tracking down dereferencing and borrowing of closure’s args

Fields

cx: &'a LateContext<'tcx>

The late context of the lint

closure_span: Span

The span of the input closure to adapt

closure_arg_is_type_annotated_double_ref: bool

Indicates if the arg of the closure is a type annotated double reference

next_pos: BytePos

last position of the span to gradually build the suggestion

suggestion_start: String

starting part of the gradually built suggestion

applicability: Applicability

confidence on the built suggestion

Implementations

impl<'tcx> DerefDelegate<'_, 'tcx>

pub fn finish(&mut self) -> String

build final suggestion:

• create the ending part of suggestion
• concatenate starting and ending parts
• potentially remove needless borrowing

fn func_takes_arg_by_double_ref(
    &self,
    parent_expr: &'tcx Expr<'_>,
    cmt_hir_id: HirId
) -> bool

indicates whether the function from parent_expr takes its args by double reference

Trait Implementations

impl<'tcx> Delegate<'tcx> for DerefDelegate<'_, 'tcx>

fn consume(&mut self, _: &PlaceWithHirId<'tcx>, _: HirId)

The value found at place is moved, depending on mode. Where diag_expr_id is the id used for diagnostics for place.

fn borrow(&mut self, cmt: &PlaceWithHirId<'tcx>, _: HirId, _: 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).

fn mutate(&mut self, _: &PlaceWithHirId<'tcx>, _: HirId)

The path at assignee_place is being assigned to. diag_expr_id is the id used for diagnostics (see consume for more details).

fn fake_read(&mut self, _: &PlaceWithHirId<'tcx>, _: FakeReadCause, _: HirId)

The place should be a fake read because of specified cause.

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).

fn bind(&mut self, binding_place: &PlaceWithHirId<'tcx>, diag_expr_id: HirId)

The path at binding_place is a binding that is being initialized.

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