Struct WriteTraits

pub struct WriteTraits<'a, Trait: ?Sized + TraitQuery> { /* private fields */ }

Write-access to all components implementing a trait for a given entity.

This supports change detection and detection for added objects via

• WriteTraits::iter_changed
• WriteTraits::iter_added

Implementations

impl<Trait: ?Sized + TraitQuery> WriteTraits<'_, Trait>

pub fn iter(&self) -> CombinedReadTraitsIter<'_, Trait>

Returns an iterator over the components implementing Trait for the current entity.

pub fn iter_mut(&mut self) -> CombinedWriteTraitsIter<'_, Trait>

Returns a mutable iterator over the components implementing Trait for the current entity.

pub fn iter_added(&self) -> impl Iterator<Item = Ref<'_, Trait>>

Returns an iterator over the components implementing Trait for the current entity that were added since the last time the system was run.

pub fn iter_changed(&self) -> impl Iterator<Item = Ref<'_, Trait>>

Returns an iterator over the components implementing Trait for the current entity whose values were changed since the last time the system was run.

pub fn iter_added_mut(&mut self) -> impl Iterator<Item = Mut<'_, Trait>>

Returns a mutable iterator over the components implementing Trait for the current entity that were added since the last time the system was run.

pub fn iter_changed_mut(&mut self) -> impl Iterator<Item = Mut<'_, Trait>>

Returns a mutable iterator over the components implementing Trait for the current entity whose values were changed since the last time the system was run.

Trait Implementations

impl<'local, Trait: ?Sized + TraitQuery> IntoIterator for &'local WriteTraits<'_, Trait>

type Item = Ref<'local, Trait>

The type of the elements being iterated over.

type IntoIter = Chain<ReadTableTraitsIter<'local, Trait>, ReadSparseTraitsIter<'local, Trait>>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<'local, Trait: ?Sized + TraitQuery> IntoIterator for &'local mut WriteTraits<'_, Trait>

type Item = Mut<'local, Trait>

The type of the elements being iterated over.

type IntoIter = Chain<WriteTableTraitsIter<'local, Trait>, WriteSparseTraitsIter<'local, Trait>>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<'w, Trait: ?Sized + TraitQuery> IntoIterator for WriteTraits<'w, Trait>

type Item = Mut<'w, Trait>

The type of the elements being iterated over.

type IntoIter = Chain<WriteTableTraitsIter<'w, Trait>, WriteSparseTraitsIter<'w, Trait>>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.