Enum ExecuteError 

pub enum ExecuteError<Txn: Transaction = UniverseTransaction> {
    Merge(<Txn as Merge>::Conflict),
    Check(<Txn as Transaction>::Mismatch),
    Commit(CommitError),
    Handle(HandleError),
}

Error type from Transaction::execute() and Transactional::transact().

Variants

Merge(<Txn as Merge>::Conflict)

A conflict was discovered between parts that were to be assembled into the transaction.

This error cannot be produced by Transaction::execute(), but only by Transactional::transact().

Check(<Txn as Transaction>::Mismatch)

The transaction’s preconditions were not met; it does not apply to the current state of the target. No change has been made.

Commit(CommitError)

An unexpected error occurred while applying the transaction’s effects. See the documentation of Transaction::commit() for the unfortunate implications of this.

Handle(HandleError)

Executing the transaction required accessing a Handle that was unavailable.

The HandleError will include the name of the problematic handle.

This error may be transient, and unlike ExecuteError::Commit, does not indicate data corruption, but code which triggers it should generally be considered incorrect.

Note that not all cases of failure due to handle access will return this error; those means of transaction execution which are specifically asked to act on a handle do, whereas handles read during the check phase will produce ExecuteError::Check, and so on. This may change in the future.

Trait Implementations

impl<Txn> Clone for ExecuteError<Txn>

where Txn: Transaction<Mismatch: Clone> + Merge<Conflict: Clone>,

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Txn> Debug for ExecuteError<Txn>

where Txn: Transaction<Mismatch: Debug> + Merge<Conflict: Debug>,

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

Formats the value using the given formatter.

impl<Txn> Display for ExecuteError<Txn>

where Txn: Transaction<Mismatch: Display> + Merge<Conflict: Display>,

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

Formats the value using the given formatter.

impl<Txn> Error for ExecuteError<Txn>

where Txn: Transaction<Mismatch: Error + 'static> + Merge<Conflict: Error + 'static>,

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<ExecuteError<SpaceTransaction>> for InGenError

fn from(error: ExecuteError<SpaceTransaction>) -> Self

Converts to this type from the input type.

impl From<ExecuteError> for GenError

fn from(error: ExecuteError<UniverseTransaction>) -> Self

Converts to this type from the input type.

impl From<ExecuteError> for InGenError

fn from(error: ExecuteError<UniverseTransaction>) -> Self

Converts to this type from the input type.

impl<Txn> PartialEq for ExecuteError<Txn>

where Txn: Transaction<Mismatch: PartialEq> + Merge<Conflict: PartialEq>,

Note: ExecuteError::Commit never compares equal, because it contains arbitrary errors which may not implement PartialEq. TODO: push this down to impl PartialEq for CommitError for more precision.

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