Struct rustc_hir::hir::Generics

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pub struct Generics<'hir> {
    pub params: &'hir [GenericParam<'hir>],
    pub predicates: &'hir [WherePredicate<'hir>],
    pub has_where_clause_predicates: bool,
    pub where_clause_span: Span,
    pub span: Span,
}
Expand description

Represents lifetimes and type parameters attached to a declaration of a function, enum, trait, etc.

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§params: &'hir [GenericParam<'hir>]§predicates: &'hir [WherePredicate<'hir>]§has_where_clause_predicates: bool§where_clause_span: Span§span: Span

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impl<'hir> Generics<'hir>

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pub const fn empty() -> &'hir Generics<'hir>

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pub fn get_named(&self, name: Symbol) -> Option<&GenericParam<'hir>>

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pub fn span_for_lifetime_suggestion(&self) -> Option<Span>

If there are generic parameters, return where to introduce a new one.

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pub fn span_for_param_suggestion(&self) -> Option<Span>

If there are generic parameters, return where to introduce a new one.

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pub fn tail_span_for_predicate_suggestion(&self) -> Span

Span where further predicates would be suggested, accounting for trailing commas, like in fn foo<T>(t: T) where T: Foo, so we don’t suggest two trailing commas.

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pub fn add_where_or_trailing_comma(&self) -> &'static str

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pub fn bounds_for_param( &self, param_def_id: LocalDefId, ) -> impl Iterator<Item = &WhereBoundPredicate<'hir>>

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pub fn outlives_for_param( &self, param_def_id: LocalDefId, ) -> impl Iterator<Item = &WhereRegionPredicate<'_>>

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pub fn bounds_span_for_suggestions( &self, param_def_id: LocalDefId, ) -> Option<(Span, Option<Span>)>

Returns a suggestable empty span right after the “final” bound of the generic parameter.

If that bound needs to be wrapped in parentheses to avoid ambiguity with subsequent bounds, it also returns an empty span for an open parenthesis as the second component.

E.g., adding + 'static after Fn() -> dyn Future<Output = ()> or Fn() -> &'static dyn Debug requires parentheses: Fn() -> (dyn Future<Output = ()>) + 'static and Fn() -> &'static (dyn Debug) + 'static, respectively.

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fn span_for_predicate_removal(&self, pos: usize) -> Span

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pub fn span_for_bound_removal( &self, predicate_pos: usize, bound_pos: usize, ) -> Span

Trait Implementations§

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impl<'hir> Clone for Generics<'hir>

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fn clone(&self) -> Generics<'hir>

Returns a copy 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<'hir> Debug for Generics<'hir>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'hir, __CTX> HashStable<__CTX> for Generics<'hir>
where __CTX: HashStableContext,

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fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

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impl<'hir> Copy for Generics<'hir>

Auto Trait Implementations§

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impl<'hir> DynSend for Generics<'hir>

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impl<'hir> DynSync for Generics<'hir>

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impl<'hir> Freeze for Generics<'hir>

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impl<'hir> RefUnwindSafe for Generics<'hir>

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impl<'hir> Send for Generics<'hir>

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impl<'hir> Sync for Generics<'hir>

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impl<'hir> Unpin for Generics<'hir>

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impl<'hir> UnwindSafe for Generics<'hir>

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

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

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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> 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>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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> 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

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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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<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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