Struct clippy_utils::usage::BindingUsageFinder

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pub struct BindingUsageFinder<'a, 'tcx> {
    cx: &'a LateContext<'tcx>,
    binding_ids: Vec<HirId>,
    usage_found: bool,
}

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§cx: &'a LateContext<'tcx>§binding_ids: Vec<HirId>§usage_found: bool

Implementations§

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impl<'a, 'tcx> BindingUsageFinder<'a, 'tcx>

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pub fn are_params_used( cx: &'a LateContext<'tcx>, body: &'tcx Body<'tcx>, ) -> bool

Trait Implementations§

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impl<'a, 'tcx> Visitor<'tcx> for BindingUsageFinder<'a, 'tcx>

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type NestedFilter = OnlyBodies

Override this type to control which nested HIR are visited; see NestedFilter for details. If you override this type, you must also override nested_visit_map. Read more
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fn visit_expr(&mut self, expr: &'tcx Expr<'tcx>)

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fn visit_path(&mut self, path: &Path<'tcx>, _: HirId)

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fn nested_visit_map(&mut self) -> Self::Map

If type NestedFilter is set to visit nested items, this method must also be overridden to provide a map to retrieve nested items.
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type Map = <Self::NestedFilter as NestedFilter<'v>>::Map

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type Result = ()

The result type of the visit_* methods. Can be either (), or ControlFlow<T>.
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fn visit_nested_item(&mut self, id: ItemId) -> Self::Result

Invoked when a nested item is encountered. By default, when Self::NestedFilter is nested_filter::None, this method does nothing. You probably don’t want to override this method – instead, override Self::NestedFilter or use the “shallow” or “deep” visit patterns described at rustc_hir::intravisit. The only reason to override this method is if you want a nested pattern but cannot supply a Map; see nested_visit_map for advice.
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fn visit_nested_trait_item(&mut self, id: TraitItemId) -> Self::Result

Like visit_nested_item(), but for trait items. See visit_nested_item() for advice on when to override this method.
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fn visit_nested_impl_item(&mut self, id: ImplItemId) -> Self::Result

Like visit_nested_item(), but for impl items. See visit_nested_item() for advice on when to override this method.
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fn visit_nested_foreign_item(&mut self, id: ForeignItemId) -> Self::Result

Like visit_nested_item(), but for foreign items. See visit_nested_item() for advice on when to override this method.
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fn visit_nested_body(&mut self, id: BodyId) -> Self::Result

Invoked to visit the body of a function, method or closure. Like visit_nested_item, does nothing by default unless you override Self::NestedFilter.
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fn visit_param(&mut self, param: &'v Param<'v>) -> Self::Result

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fn visit_item(&mut self, i: &'v Item<'v>) -> Self::Result

Visits the top-level item and (optionally) nested items / impl items. See visit_nested_item for details.
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fn visit_body(&mut self, b: &Body<'v>) -> Self::Result

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fn visit_id(&mut self, _hir_id: HirId) -> Self::Result

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fn visit_name(&mut self, _name: Symbol) -> Self::Result

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fn visit_ident(&mut self, ident: Ident) -> Self::Result

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fn visit_mod(&mut self, m: &'v Mod<'v>, _s: Span, n: HirId) -> Self::Result

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fn visit_foreign_item(&mut self, i: &'v ForeignItem<'v>) -> Self::Result

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fn visit_local(&mut self, l: &'v LetStmt<'v>) -> Self::Result

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fn visit_block(&mut self, b: &'v Block<'v>) -> Self::Result

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fn visit_stmt(&mut self, s: &'v Stmt<'v>) -> Self::Result

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fn visit_arm(&mut self, a: &'v Arm<'v>) -> Self::Result

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fn visit_pat(&mut self, p: &'v Pat<'v>) -> Self::Result

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fn visit_pat_field(&mut self, f: &'v PatField<'v>) -> Self::Result

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fn visit_array_length(&mut self, len: &'v ArrayLen<'v>) -> Self::Result

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fn visit_anon_const(&mut self, c: &'v AnonConst) -> Self::Result

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fn visit_inline_const(&mut self, c: &'v ConstBlock) -> Self::Result

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fn visit_const_arg(&mut self, c: &'v ConstArg<'v>) -> Self::Result

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fn visit_expr_field(&mut self, field: &'v ExprField<'v>) -> Self::Result

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fn visit_ty(&mut self, t: &'v Ty<'v>) -> Self::Result

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fn visit_pattern_type_pattern(&mut self, _p: &'v Pat<'v>)

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fn visit_generic_param(&mut self, p: &'v GenericParam<'v>) -> Self::Result

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fn visit_const_param_default( &mut self, _param: HirId, ct: &'v ConstArg<'v>, ) -> Self::Result

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fn visit_generics(&mut self, g: &'v Generics<'v>) -> Self::Result

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fn visit_where_predicate( &mut self, predicate: &'v WherePredicate<'v>, ) -> Self::Result

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fn visit_fn_ret_ty(&mut self, ret_ty: &'v FnRetTy<'v>) -> Self::Result

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fn visit_fn_decl(&mut self, fd: &'v FnDecl<'v>) -> Self::Result

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fn visit_fn( &mut self, fk: FnKind<'v>, fd: &'v FnDecl<'v>, b: BodyId, _: Span, id: LocalDefId, ) -> Self::Result

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fn visit_use( &mut self, path: &'v Path<'v, SmallVec<[Res; 3]>>, hir_id: HirId, ) -> Self::Result

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fn visit_trait_item(&mut self, ti: &'v TraitItem<'v>) -> Self::Result

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fn visit_trait_item_ref(&mut self, ii: &'v TraitItemRef) -> Self::Result

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fn visit_impl_item(&mut self, ii: &'v ImplItem<'v>) -> Self::Result

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fn visit_foreign_item_ref(&mut self, ii: &'v ForeignItemRef) -> Self::Result

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fn visit_impl_item_ref(&mut self, ii: &'v ImplItemRef) -> Self::Result

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fn visit_trait_ref(&mut self, t: &'v TraitRef<'v>) -> Self::Result

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fn visit_param_bound(&mut self, bounds: &'v GenericBound<'v>) -> Self::Result

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fn visit_precise_capturing_arg( &mut self, arg: &'v PreciseCapturingArg<'v>, ) -> Self::Result

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fn visit_poly_trait_ref(&mut self, t: &'v PolyTraitRef<'v>) -> Self::Result

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fn visit_variant_data(&mut self, s: &'v VariantData<'v>) -> Self::Result

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fn visit_field_def(&mut self, s: &'v FieldDef<'v>) -> Self::Result

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fn visit_enum_def( &mut self, enum_definition: &'v EnumDef<'v>, item_id: HirId, ) -> Self::Result

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fn visit_variant(&mut self, v: &'v Variant<'v>) -> Self::Result

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fn visit_label(&mut self, label: &'v Label) -> Self::Result

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fn visit_infer(&mut self, inf: &'v InferArg) -> Self::Result

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fn visit_generic_arg(&mut self, generic_arg: &'v GenericArg<'v>) -> Self::Result

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fn visit_lifetime(&mut self, lifetime: &'v Lifetime) -> Self::Result

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fn visit_qpath( &mut self, qpath: &'v QPath<'v>, id: HirId, _span: Span, ) -> Self::Result

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fn visit_path_segment( &mut self, path_segment: &'v PathSegment<'v>, ) -> Self::Result

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fn visit_generic_args( &mut self, generic_args: &'v GenericArgs<'v>, ) -> Self::Result

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fn visit_assoc_item_constraint( &mut self, constraint: &'v AssocItemConstraint<'v>, ) -> Self::Result

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fn visit_attribute(&mut self, _attr: &'v Attribute) -> Self::Result

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fn visit_associated_item_kind( &mut self, kind: &'v AssocItemKind, ) -> Self::Result

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fn visit_defaultness(&mut self, defaultness: &'v Defaultness) -> Self::Result

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fn visit_inline_asm( &mut self, asm: &'v InlineAsm<'v>, id: HirId, ) -> Self::Result

Auto Trait Implementations§

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impl<'a, 'tcx> Freeze for BindingUsageFinder<'a, 'tcx>

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impl<'a, 'tcx> !RefUnwindSafe for BindingUsageFinder<'a, 'tcx>

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impl<'a, 'tcx> !Send for BindingUsageFinder<'a, 'tcx>

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impl<'a, 'tcx> !Sync for BindingUsageFinder<'a, 'tcx>

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impl<'a, 'tcx> Unpin for BindingUsageFinder<'a, 'tcx>

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impl<'a, 'tcx> !UnwindSafe for BindingUsageFinder<'a, 'tcx>

Blanket Implementations§

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impl<T> Any for T
where 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 T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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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

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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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 T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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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: 40 bytes