Enum Xor

pub enum Xor<L, R> {
    Left(L),
    Right(R),
}

A Query which matches if the L or R queries match, but not both.

Variants

Left(L)

Only the left query matched.

Right(R)

Only the right query matched.

Implementations

impl<L, R> Xor<L, R>

pub fn map<F, G, M, S>(self, f: F, g: G) -> Xor<M, S>

where F: FnOnce(L) -> M, G: FnOnce(R) -> S,

Convert Xor<L, R> to Xor<M, S> using the supplied closures.

pub const fn as_ref(&self) -> Xor<&L, &R>

Convert &Xor<L, R> to Xor<&L, &R>.

pub fn as_mut(&mut self) -> Xor<&mut L, &mut R>

Convert &mut Xor<L, R> to Xor<&mut L, &mut R>.

Trait Implementations

impl<L, R> Clone for Xor<L, R>

where L: Clone, R: Clone,

fn clone(&self) -> Xor<L, R>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<L, R> Debug for Xor<L, R>

where L: Debug, R: Debug,

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

Formats the value using the given formatter.

impl<L, R> Hash for Xor<L, R>

where L: Hash, R: Hash,

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

where __H: Hasher,

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<L, R> Ord for Xor<L, R>

where L: Ord, R: Ord,

fn cmp(&self, other: &Xor<L, R>) -> 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<L, R> PartialEq for Xor<L, R>

where L: PartialEq, R: PartialEq,

fn eq(&self, other: &Xor<L, R>) -> 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<L, R> PartialOrd for Xor<L, R>

where L: PartialOrd, R: PartialOrd,

fn partial_cmp(&self, other: &Xor<L, R>) -> 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<L, R> Query for Xor<L, R>

where L: Query, R: Query,

type Item<'a> = Xor<<L as Query>::Item<'a>, <R as Query>::Item<'a>>

The item returned by this query. This is usually the same type as Self, but with a modified lifetime.

type ArchState = Xor<<L as Query>::ArchState, <R as Query>::ArchState>

Per-archetype state, e.g. pointers to archetype columns.

type State = (<L as Query>::State, <R as Query>::State)

Cached data for fetch initialization, e.g. component indices.

fn init( world: &mut World, config: &mut HandlerConfig, ) -> Result<(ComponentAccess, <Xor<L, R> as Query>::State), InitError>

Initialize the query. Returns an expression describing the components accessed by the query and a new instance of Self::State.

fn new_state(world: &mut World) -> <Xor<L, R> as Query>::State

Returns a new Self::State instance.

fn new_arch_state( arch: &Archetype, _: &mut <Xor<L, R> as Query>::State, ) -> Option<<Xor<L, R> as Query>::ArchState>

Returns a new Self::ArchState instance.

unsafe fn get<'a>( state: &<Xor<L, R> as Query>::ArchState, row: ArchetypeRow, ) -> <Xor<L, R> as Query>::Item<'a>

Gets the query item at the given row in the archetype.

impl<L, R> Copy for Xor<L, R>

where L: Copy, R: Copy,

impl<L, R> Eq for Xor<L, R>

where L: Eq, R: Eq,

impl<L, R> ReadOnlyQuery for Xor<L, R>

where L: ReadOnlyQuery, R: ReadOnlyQuery,

impl<L, R> StructuralPartialEq for Xor<L, R>