pub enum Extern {
    Extractor {
        term: Ident,
        func: Ident,
        pos: Pos,
        infallible: bool,
    },
    Constructor {
        term: Ident,
        func: Ident,
        pos: Pos,
    },
    Const {
        name: Ident,
        ty: Ident,
        pos: Pos,
    },
}
Expand description

An external binding: an extractor or constructor function attached to a term.

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Extractor

Fields

§term: Ident

The term to which this external extractor is attached.

§func: Ident

The Rust function name.

§pos: Pos

The position of this decl.

§infallible: bool

Infallibility: if an external extractor returns (T1, T2, ...) rather than Option<(T1, T2, ...)>, and hence can never fail, it is declared as such and allows for slightly better code to be generated.

An external extractor: (extractor Term rustfunc) form.

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Constructor

Fields

§term: Ident

The term to which this external constructor is attached.

§func: Ident

The Rust function name.

§pos: Pos

The position of this decl.

An external constructor: (constructor Term rustfunc) form.

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Const

Fields

§name: Ident
§pos: Pos

An external constant: (const $IDENT type) form.

Trait Implementations§

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impl Clone for Extern

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fn clone(&self) -> Extern

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 Extern

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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 PartialEq<Extern> for Extern

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fn eq(&self, other: &Extern) -> 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 Extern

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impl StructuralEq for Extern

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impl StructuralPartialEq for Extern

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Blanket 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<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.