Struct starlark::values::Demand

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pub struct Demand<'a, 'v> { /* private fields */ }
Expand description

Taken by StarlarkValue::provide to provide different data depending on the type.

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impl<'a, 'v> Demand<'a, 'v>

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pub fn provide_value<T: AnyLifetime<'v>>(&mut self, value: T)

Provide a value of given type.

If type matches the type requested from Value::request_value, the value is stored inside the Demand and later returned, otherwise the value is discarded.

Auto Trait Implementations§

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impl<'a, 'v> RefUnwindSafe for Demand<'a, 'v>

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impl<'a, 'v> !Send for Demand<'a, 'v>

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impl<'a, 'v> !Sync for Demand<'a, 'v>

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impl<'a, 'v> Unpin for Demand<'a, 'v>

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impl<'a, 'v> !UnwindSafe for Demand<'a, 'v>

Blanket Implementations§

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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> 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 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> ToAst for T

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fn ast(self, begin: usize, end: usize) -> Spanned<Self>

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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.