Enum ArchetypeAccessError 

#[non_exhaustive]
pub enum ArchetypeAccessError {
    NoSuchArchetype {
        id: u32,
    },
    Empty {
        id: u32,
    },
    NotVisible {
        id: u32,
        scope: Entity,
    },
}

Why a lookup by archetype id was turned down.

An archetype id is the row it was registered at, so a stale id keeps naming a different archetype instead of naming nothing. These variants are what a caller checks against.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

NoSuchArchetype

No archetype was ever registered under this id.

Fields

id: u32

The id that was looked up.

Empty

The archetype exists, but it holds no row to look at.

Fields

id: u32

The id that was looked up.

NotVisible

The archetype holds rows this scope cannot reach.

Fields

id: u32

The id that was looked up.

scope: Entity

The scope the lookup was made from.

Trait Implementations

impl Clone for ArchetypeAccessError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ArchetypeAccessError

impl Debug for ArchetypeAccessError

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

Formats the value using the given formatter.

impl Display for ArchetypeAccessError

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

Formats the value using the given formatter.

impl Eq for ArchetypeAccessError

impl Error for ArchetypeAccessError

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

Returns 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 From<ArchetypeAccessError> for EntityAccessError

fn from(source: ArchetypeAccessError) -> Self

Converts to this type from the input type.

impl PartialEq for ArchetypeAccessError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ArchetypeAccessError