Enum NeedPlaceholder 

pub enum NeedPlaceholder {
    Yes(u32),
    No,
}

用于标记是否需要为外部库预留占位资源。

Variants

Yes(u32)

需要预留占位资源及预留的数量。

No

不需要预留占位资源。

Trait Implementations

impl Clone for NeedPlaceholder

fn clone(&self) -> NeedPlaceholder

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NeedPlaceholder

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

Formats the value using the given formatter.

impl Default for NeedPlaceholder

fn default() -> NeedPlaceholder

Returns the “default value” for a type.

impl Hash for NeedPlaceholder

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for NeedPlaceholder

fn cmp(&self, other: &NeedPlaceholder) -> 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.

impl PartialEq for NeedPlaceholder

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for NeedPlaceholder

fn partial_cmp(&self, other: &NeedPlaceholder) -> 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 Copy for NeedPlaceholder

impl Eq for NeedPlaceholder

impl StructuralPartialEq for NeedPlaceholder