Struct oxygengine::prelude::QueryOne

pub struct QueryOne<'a, Q>where
    Q: Query,{ /* private fields */ }

A borrow of a World sufficient to execute the query Q on a single entity

Implementations

impl<'a, Q> QueryOne<'a, Q>where Q: Query,

pub fn get(&mut self) -> Option<<Q as Query>::Item<'_>>

Get the query result, or None if the entity does not satisfy the query

Must be called at most once.

Panics if called more than once or if it would construct a borrow that clashes with another pre-existing borrow.

pub fn with<R>(self) -> QueryOne<'a, With<Q, R>>where R: Query,

Transform the query into one that requires another query be satisfied

See QueryBorrow::with

pub fn without<R>(self) -> QueryOne<'a, Without<Q, R>>where R: Query,

Transform the query into one that skips entities satisfying another

See QueryBorrow::without for details.

Trait Implementations

impl<Q> Drop for QueryOne<'_, Q>where Q: Query,

fn drop(&mut self)

Executes the destructor for this type.

impl<Q> Send for QueryOne<'_, Q>where Q: Query,

impl<Q> Sync for QueryOne<'_, Q>where Q: Query,