DoubleNegations

rustc_lint::builtin

Struct DoubleNegations 

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pub struct DoubleNegations;
Expand description

Lint for expressions of the form --x that can be confused with C’s prefix decrement operator.

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impl Clone for DoubleNegations

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fn clone(&self) -> DoubleNegations

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl EarlyLintPass for DoubleNegations

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fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &Expr)

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fn check_param(&mut self, _: &EarlyContext<'_>, _: &Param)

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fn check_ident(&mut self, _: &EarlyContext<'_>, _: &Ident)

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fn check_crate(&mut self, _: &EarlyContext<'_>, _: &Crate)

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fn check_crate_post(&mut self, _: &EarlyContext<'_>, _: &Crate)

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fn check_item(&mut self, _: &EarlyContext<'_>, _: &Item)

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fn check_item_post(&mut self, _: &EarlyContext<'_>, _: &Item)

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fn check_local(&mut self, _: &EarlyContext<'_>, _: &Local)

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fn check_block(&mut self, _: &EarlyContext<'_>, _: &Block)

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fn check_stmt(&mut self, _: &EarlyContext<'_>, _: &Stmt)

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fn check_arm(&mut self, _: &EarlyContext<'_>, _: &Arm)

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fn check_pat(&mut self, _: &EarlyContext<'_>, _: &Pat)

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fn check_pat_post(&mut self, _: &EarlyContext<'_>, _: &Pat)

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fn check_expr_post(&mut self, _: &EarlyContext<'_>, _: &Expr)

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fn check_ty(&mut self, _: &EarlyContext<'_>, _: &Ty)

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fn check_generic_arg(&mut self, _: &EarlyContext<'_>, _: &GenericArg)

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fn check_generic_param(&mut self, _: &EarlyContext<'_>, _: &GenericParam)

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fn check_generics(&mut self, _: &EarlyContext<'_>, _: &Generics)

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fn check_poly_trait_ref(&mut self, _: &EarlyContext<'_>, _: &PolyTraitRef)

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fn check_fn(&mut self, _: &EarlyContext<'_>, _: FnKind<'_>, _: Span, _: NodeId)

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fn check_trait_item(&mut self, _: &EarlyContext<'_>, _: &AssocItem)

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fn check_trait_item_post(&mut self, _: &EarlyContext<'_>, _: &AssocItem)

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fn check_impl_item(&mut self, _: &EarlyContext<'_>, _: &AssocItem)

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fn check_impl_item_post(&mut self, _: &EarlyContext<'_>, _: &AssocItem)

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fn check_variant(&mut self, _: &EarlyContext<'_>, _: &Variant)

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fn check_attribute(&mut self, _: &EarlyContext<'_>, _: &Attribute)

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fn check_attributes(&mut self, _: &EarlyContext<'_>, _: &[Attribute])

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fn check_attributes_post(&mut self, _: &EarlyContext<'_>, _: &[Attribute])

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fn check_mac_def(&mut self, _: &EarlyContext<'_>, _: &MacroDef)

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fn check_mac(&mut self, _: &EarlyContext<'_>, _: &MacCall)

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fn enter_where_predicate(&mut self, _: &EarlyContext<'_>, _: &WherePredicate)

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fn exit_where_predicate(&mut self, _: &EarlyContext<'_>, _: &WherePredicate)

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impl LintPass for DoubleNegations

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fn name(&self) -> &'static str

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fn get_lints(&self) -> LintVec

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impl Copy for DoubleNegations

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Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment

Alignment of Self.
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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<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<T> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

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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<P> IntoQueryParam<P> for P

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fn into_query_param(self) -> P

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impl<T> MaybeResult<T> for T

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type Error = !

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fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

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unsafe fn deref<'a>(ptr: usize) -> &'a T

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unsafe fn drop(ptr: usize)

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. 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.
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impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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fn upcast(self, interner: I) -> U

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fn upcast_from(from: T, _tcx: I) -> T

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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

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impl<T> ErasedDestructor for T
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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.

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