Enum bevy::ecs::query::QueryEntityError

pub enum QueryEntityError {
    QueryDoesNotMatch(Entity),
    NoSuchEntity(Entity),
    AliasedMutability(Entity),
}

An error that occurs when retrieving a specific Entity’s query result from Query or QueryState.

Variants

QueryDoesNotMatch(Entity)

The given Entity’s components do not match the query.

Either it does not have a requested component, or it has a component which the query filters out.

NoSuchEntity(Entity)

The given Entity does not exist.

AliasedMutability(Entity)

The Entity was requested mutably more than once.

See QueryState::get_many_mut for an example.

Trait Implementations

impl Clone for QueryEntityError

fn clone(&self) -> QueryEntityError

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for QueryEntityError

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

Formats the value using the given formatter.

impl Display for QueryEntityError

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

Formats the value using the given formatter.

impl Error for QueryEntityError

fn source(&self) -> Option<&(dyn Error + 'static)>

The lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type based access to context intended for error reports.

impl PartialEq for QueryEntityError

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

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

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

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

impl Copy for QueryEntityError

impl Eq for QueryEntityError

impl StructuralEq for QueryEntityError

impl StructuralPartialEq for QueryEntityError