Enum abi_stable::sabi_types::MaybeCmp

#[repr(u8)]
pub enum MaybeCmp<T> {
    Just(T),
    Nothing,
}

An Option-like type which is only compares equal if it contains a value.

Example

use abi_stable::sabi_types::MaybeCmp;

assert_eq!( MaybeCmp::Just(10), MaybeCmp::Just(10) );

assert_ne!( MaybeCmp::Just(0), MaybeCmp::Just(10) );
assert_ne!( MaybeCmp::Just(0), MaybeCmp::Nothing );
assert_ne!( MaybeCmp::Nothing, MaybeCmp::Just(0) );
assert_ne!( MaybeCmp::<u32>::Nothing, MaybeCmp::Nothing );

Variants

Just(T)

Nothing

Trait Implementations

impl<T: Clone> Clone for MaybeCmp<T>

fn clone(&self) -> MaybeCmp<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Copy> Copy for MaybeCmp<T>

impl<T: Debug> Debug for MaybeCmp<T>

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

Formats the value using the given formatter.

impl<T> Eq for MaybeCmp<T> where
    T: Eq, 

impl<T> GetStaticEquivalent_ for MaybeCmp<T> where
    T: __StableAbi, 

type StaticEquivalent = _static_MaybeCmp<__GetStaticEquivalent<T>>

impl<T: Hash> Hash for MaybeCmp<T>

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, 

Feeds a slice of this type into the given [Hasher].

impl<T> PartialEq<MaybeCmp<T>> for MaybeCmp<T> where
    T: PartialEq, 

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

This method tests for self and other values to be equal, and is used by ==.

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl<T> PartialOrd<MaybeCmp<T>> for MaybeCmp<T> where
    T: PartialOrd, 

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

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

#[must_use] fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

#[must_use] fn le(&self, other: &Rhs) -> bool

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

#[must_use] fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

#[must_use] fn ge(&self, other: &Rhs) -> bool

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

impl<T> SharedStableAbi for MaybeCmp<T> where
    T: __StableAbi, 

type IsNonZeroType = False

Whether this type has a single invalid bit-pattern.

type Kind = __ValueKind

The kind of abi stability of this type,there are 2:

const S_LAYOUT: &'static TypeLayout

The layout of the type provided by implementors.

const S_ABI_CONSTS: AbiConsts