Enum CommandError 

pub enum CommandError {
    UnknownElement(GlobalId),
    DuplicateElement(GlobalId),
    NotAHost {
        host: GlobalId,
        class: String,
    },
    NotAnOpening(GlobalId),
    SelfReference(GlobalId),
    StillReferenced {
        global_id: GlobalId,
        relationship: &'static str,
    },
    NoSuchRelationship {
        relationship: &'static str,
        a: GlobalId,
        b: GlobalId,
    },
    RelationshipExists {
        relationship: &'static str,
        a: GlobalId,
        b: GlobalId,
    },
    NotSpatial(GlobalId),
    InvalidRepresentation(GlobalId),
    NothingToUndo,
    NothingToRedo,
}

Why a command was rejected.

Commands are validated before they mutate anything: a rejected command leaves the model exactly as it was.

Variants

UnknownElement(GlobalId)

DuplicateElement(GlobalId)

NotAHost

Fields

host: GlobalId

class: String

NotAnOpening(GlobalId)

SelfReference(GlobalId)

StillReferenced

Fields

global_id: GlobalId

relationship: &'static str

NoSuchRelationship

Fields

relationship: &'static str

a: GlobalId

b: GlobalId

RelationshipExists

Fields

relationship: &'static str

a: GlobalId

b: GlobalId

NotSpatial(GlobalId)

InvalidRepresentation(GlobalId)

NothingToUndo

NothingToRedo

Trait Implementations

impl Clone for CommandError

fn clone(&self) -> CommandError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CommandError

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

Formats the value using the given formatter.

impl Display for CommandError

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

Formats the value using the given formatter.

impl Error for CommandError

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 PartialEq for CommandError

fn eq(&self, other: &CommandError) -> 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 StructuralPartialEq for CommandError