lambdas

Struct ProgramDepth

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pub struct ProgramDepth {}
Expand description

depth of a program. For example a leaf is depth 1.

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impl CostFunction<Lambda> for ProgramDepth

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type Cost = i32

The Cost type. It only requires PartialOrd so you can use floating point types, but failed comparisons (NaNs) will result in a panic.
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fn cost<C>(&mut self, enode: &Lambda, costs: C) -> Self::Cost
where C: FnMut(Id) -> Self::Cost,

Calculates the cost of an enode whose children are Costs. Read more
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fn cost_rec(&mut self, expr: &RecExpr<L>) -> Self::Cost

Calculates the total cost of a RecExpr. Read more

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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, 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.