# Struct rustc_type_ir::FnSig

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    pub struct FnSig<I: Interner> {
        pub inputs_and_output: I::Tys,
        pub c_variadic: bool,
        pub safety: I::Safety,
        pub abi: I::Abi,
    }

## Fields§

§`inputs_and_output: I::Tys`§`c_variadic: bool`§`safety: I::Safety`§`abi: I::Abi`

## Implementations§

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### impl<I: Interner> FnSig<I>

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#### pub fn split_inputs_and_output(self) -> (I::FnInputTys, I::Ty)

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#### pub fn inputs(self) -> I::FnInputTys

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#### pub fn output(self) -> I::Ty

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#### pub fn is_fn_trait_compatible(self) -> bool

## Trait Implementations§

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### impl<I: Interner> Clone for FnSig<I>

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#### fn clone(&self) -> Self

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<I: Interner> Debug for FnSig<I>

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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<I: Interner, __D: TyDecoder<I = I>> Decodable<__D> for FnSig<I>
where I::Tys: Decodable<__D>, I::Safety: Decodable<__D>, I::Abi: Decodable<__D>,

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#### fn decode(__decoder: &mut __D) -> Self

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### impl<I: Interner> Display for FnSig<I>

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

Formats the value using the given formatter. Read more
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### impl<I: Interner, __E: TyEncoder<I = I>> Encodable<__E> for FnSig<I>
where I::Tys: Encodable<__E>, I::Safety: Encodable<__E>, I::Abi: Encodable<__E>,

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#### fn encode(&self, __encoder: &mut __E)

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### impl<I: Interner> Hash for FnSig<I>

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#### fn hash<__HI>(&self, __state: &mut __HI)
where __HI: Hasher,

Feeds this value into the given `Hasher`. Read more
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#### fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given `Hasher`. Read more
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### impl<I: Interner, __CTX> HashStable<__CTX> for FnSig<I>
where I::Tys: HashStable<__CTX>, I::Safety: HashStable<__CTX>, I::Abi: HashStable<__CTX>,

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

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### impl<I, J> Lift<J> for FnSig<I>
where I: Interner, J: Interner, I::Tys: Lift<J, Lifted = J::Tys>, bool: Lift<J, Lifted = bool>, I::Safety: Lift<J, Lifted = J::Safety>, I::Abi: Lift<J, Lifted = J::Abi>,

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#### type Lifted = FnSig<J>

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#### fn lift_to_tcx(self, interner: J) -> Option<Self::Lifted>

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### impl<I: Interner> PartialEq for FnSig<I>

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#### fn eq(&self, other: &Self) -> bool

This method tests for `self` and `other` values to be equal, and is used by `==`.
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#### fn ne(&self, other: &Rhs) -> bool

This method tests for `!=`. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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### impl<I: Interner> Relate<I> for FnSig<I>

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#### fn relate<R: TypeRelation<I>>( relation: &mut R, a: FnSig<I>, b: FnSig<I>, ) -> RelateResult<I, FnSig<I>>

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### impl<I> TypeFoldable<I> for FnSig<I>
where I: Interner, I::Tys: TypeFoldable<I>, I::Safety: TypeFoldable<I>, I::Abi: TypeFoldable<I>,

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#### fn try_fold_with<__F: FallibleTypeFolder<I>>( self, __folder: &mut __F, ) -> Result<Self, __F::Error>

The entry point for folding. To fold a value `t` with a folder `f` call: `t.try_fold_with(f)`. Read more
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#### fn fold_with<F: TypeFolder<I>>(self, folder: &mut F) -> Self

A convenient alternative to `try_fold_with` for use with infallible folders. Do not override this method, to ensure coherence with `try_fold_with`.
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### impl<I> TypeVisitable<I> for FnSig<I>
where I: Interner, I::Tys: TypeVisitable<I>, I::Safety: TypeVisitable<I>, I::Abi: TypeVisitable<I>,

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#### fn visit_with<__V: TypeVisitor<I>>(&self, __visitor: &mut __V) -> __V::Result

The entry point for visiting. To visit a value `t` with a visitor `v` call: `t.visit_with(v)`. Read more
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### impl<I: Interner> Copy for FnSig<I>

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### impl<I: Interner> Eq for FnSig<I>

## Auto Trait Implementations§

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### impl<I> DynSend for FnSig<I>
where <I as Interner>::Tys: DynSend, <I as Interner>::Safety: DynSend, <I as Interner>::Abi: DynSend,

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### impl<I> DynSync for FnSig<I>
where <I as Interner>::Tys: DynSync, <I as Interner>::Safety: DynSync, <I as Interner>::Abi: DynSync,

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### impl<I> Freeze for FnSig<I>
where <I as Interner>::Tys: Freeze, <I as Interner>::Safety: Freeze, <I as Interner>::Abi: Freeze,

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### impl<I> RefUnwindSafe for FnSig<I>
where <I as Interner>::Tys: RefUnwindSafe, <I as Interner>::Safety: RefUnwindSafe, <I as Interner>::Abi: RefUnwindSafe,

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### impl<I> Send for FnSig<I>
where <I as Interner>::Tys: Send, <I as Interner>::Safety: Send, <I as Interner>::Abi: Send,

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### impl<I> Sync for FnSig<I>
where <I as Interner>::Tys: Sync, <I as Interner>::Safety: Sync, <I as Interner>::Abi: Sync,

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### impl<I> Unpin for FnSig<I>
where <I as Interner>::Tys: Unpin, <I as Interner>::Safety: Unpin, <I as Interner>::Abi: Unpin,

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### impl<I> UnwindSafe for FnSig<I>
where <I as Interner>::Tys: UnwindSafe, <I as Interner>::Safety: UnwindSafe, <I as Interner>::Abi: UnwindSafe,

## 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<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, 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<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Compare self to `key` and return `true` if they are equal.
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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> ToString for T
where T: Display + ?Sized,

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#### default fn to_string(&self) -> String

Converts the given value to a `String`. 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> TypeVisitableExt<I> for T
where I: Interner, T: TypeVisitable<I>,

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#### fn has_type_flags(&self, flags: TypeFlags) -> bool

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#### fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool

Returns `true` if `self` has any late-bound regions that are either bound by `binder` or bound by some binder outside of `binder`. If `binder` is `ty::INNERMOST`, this indicates whether there are any late-bound regions that appear free.
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#### fn error_reported(&self) -> Result<(), <I as Interner>::ErrorGuaranteed>

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#### fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool

Returns `true` if this type has any regions that escape `binder` (and hence are not bound by it).
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#### fn has_escaping_bound_vars(&self) -> bool

Return `true` if this type has regions that are not a part of the type. For example, `for<'a> fn(&'a i32)` return `false`, while `fn(&'a i32)` would return `true`. The latter can occur when traversing through the former. Read more
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#### fn has_aliases(&self) -> bool

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#### fn has_inherent_projections(&self) -> bool

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#### fn has_opaque_types(&self) -> bool

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#### fn has_coroutines(&self) -> bool

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#### fn references_error(&self) -> bool

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#### fn has_non_region_param(&self) -> bool

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#### fn has_infer_regions(&self) -> bool

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#### fn has_infer_types(&self) -> bool

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#### fn has_non_region_infer(&self) -> bool

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#### fn has_infer(&self) -> bool

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#### fn has_placeholders(&self) -> bool

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#### fn has_non_region_placeholders(&self) -> bool

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#### fn has_param(&self) -> bool

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#### fn has_free_regions(&self) -> bool

“Free” regions in this context means that it has any region that is not (a) erased or (b) late-bound.
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#### fn has_erased_regions(&self) -> bool

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#### fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.
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#### fn is_global(&self) -> bool

Indicates whether this value references only ‘global’ generic parameters that are the same regardless of what fn we are in. This is used for caching.
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#### fn has_bound_regions(&self) -> bool

True if there are any late-bound regions
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#### fn has_non_region_bound_vars(&self) -> bool

True if there are any late-bound non-region variables
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#### fn has_bound_vars(&self) -> bool

True if there are any bound variables
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#### fn still_further_specializable(&self) -> bool

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of `impl` specialization.
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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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### impl<I, T> UpcastFrom<I, T> for T

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

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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: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.