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Evaluator

Struct Evaluator 

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pub struct Evaluator { /* private fields */ }
Expand description

位并行求值器:把表达式在全部 3^n 组赋值上求值。

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impl Evaluator

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pub fn new(algebra: Algebra) -> Self

新建求值器。

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pub fn algebra(&self) -> Algebra

语义体系。

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pub fn variables(&self) -> &[String]

变量名列表。

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pub fn declare(&mut self, name: impl Into<String>) -> usize

登记变量(重复登记返回原编号)。

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pub fn assignment_count(&self) -> Result<u64, LimitError>

赋值总数 3^n;3^n 超出 u64 时返回 LimitError::CountOverflow。

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pub fn chunk_planes(&self, base: u64) -> Result<Vec<TriBit>, LimitError>

构造一个 64 组分块中各变量的位平面。

base 是该分块首个赋值的编号,必须是 64 的倍数且 base + 63 不溢出; 否则返回 LimitError::ChunkBase。变量 i 的取值由赋值编号的第 i 个三进制位决定(0 → 0,1 → 1,2 → X)。

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pub fn evaluate<F>(&self, f: F) -> Result<TruthTable, LimitError>
where F: Fn(&[TriBit]) -> TriBit,

在全部 3^n 组赋值上求值(默认预算)。

内部按 64 组一块做位并行计算,再展开为逐组结果。

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pub fn evaluate_within<F>( &self, f: F, limits: Limits, ) -> Result<TruthTable, LimitError>
where F: Fn(&[TriBit]) -> TriBit,

同 Evaluator::evaluate,但可指定变量数与行数预算。

预算在分配结果表之前检查:3^n 用 checked 计算,行数先与 Limits::max_rows 比较,再做可失败转换与分配。

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impl Clone for Evaluator

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Evaluator

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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> 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, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

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.