pub struct Signature {
    pub type_signature: TypeSignature,
    pub volatility: Volatility,
}
Expand description

The signature of a function defines the supported argument types and its volatility.

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§type_signature: TypeSignature

type_signature - The types that the function accepts. See TypeSignature for more information.

§volatility: Volatility

volatility - The volatility of the function. See Volatility for more information.

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impl Signature

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pub fn new(type_signature: TypeSignature, volatility: Volatility) -> Self

new - Creates a new Signature from any type signature and the volatility.

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pub fn variadic(common_types: Vec<DataType>, volatility: Volatility) -> Self

variadic - Creates a variadic signature that represents an arbitrary number of arguments all from a type in common_types.

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pub fn variadic_equal(volatility: Volatility) -> Self

variadic_equal - Creates a variadic signature that represents an arbitrary number of arguments of the same type.

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pub fn variadic_any(volatility: Volatility) -> Self

variadic_any - Creates a variadic signature that represents an arbitrary number of arguments of any type.

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pub fn uniform( arg_count: usize, valid_types: Vec<DataType>, volatility: Volatility ) -> Self

uniform - Creates a function with a fixed number of arguments of the same type, which must be from valid_types.

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pub fn exact(exact_types: Vec<DataType>, volatility: Volatility) -> Self

exact - Creates a signature which must match the types in exact_types in order.

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pub fn any(arg_count: usize, volatility: Volatility) -> Self

any - Creates a signature which can a be made of any type but of a specified number

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pub fn one_of( type_signatures: Vec<TypeSignature>, volatility: Volatility ) -> Self

one_of Creates a signature which can match any of the TypeSignatures which are passed in.

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impl Clone for Signature

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fn clone(&self) -> Signature

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 Debug for Signature

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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 Hash for Signature

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fn hash<__H: Hasher>(&self, state: &mut __H)

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 PartialEq<Signature> for Signature

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fn eq(&self, other: &Signature) -> 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 Eq for Signature

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impl StructuralEq for Signature

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impl StructuralPartialEq for Signature

Auto Trait Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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<Q, K> Equivalent<K> for Qwhere 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 Qwhere 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, U> Into<U> for Twhere 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> ToOwned for Twhere 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 Twhere 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 Twhere 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<T> Allocation for Twhere T: RefUnwindSafe + Send + Sync,