Enum Effect 

pub enum Effect {
    Pure,
    MayRead,
    MayThrow,
    MayWrite,
    Unknown,
}

Variants

Pure

无可观察效果、结果确定。可自由移动/重求值。

MayRead

只读（局部变量等）。与纯读之间可重排；被写依赖阻断。

MayThrow

可能抛异常 / 读堆内存（字段、数组）等。

MayWrite

可能写内存。

Unknown

完全未知（未知调用等）。一律视为不可简化。

Implementations

impl Effect

pub fn is_pure(self) -> bool

pub fn worst(self, other: Effect) -> Effect

Trait Implementations

impl Clone for Effect

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Effect

impl Debug for Effect

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

Formats the value using the given formatter.

impl Eq for Effect

impl Ord for Effect

fn cmp(&self, other: &Effect) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Effect

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for Effect

fn partial_cmp(&self, other: &Effect) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Effect