Enum MachineIOError 

pub enum MachineIOError {
    FactExists,
    FactNotFound,
    Internal,
    Bug(Bug),
}

An I/O error.

Variants

FactExists

Attempted to create a fact that already exists

FactNotFound

Attempt to access a fact that does not exist)

Internal

Some internal operation has failed

Bug(Bug)

Bug

Trait Implementations

impl Debug for MachineIOError

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

Formats the value using the given formatter.

impl Display for MachineIOError

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

Formats the value using the given formatter.

impl Error for MachineIOError

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<Bug> for MachineIOError

fn from(bug: Bug) -> Self

Converts to this type from the input type.

impl From<MachineIOError> for MachineError

fn from(value: MachineIOError) -> Self

Converts to this type from the input type.

impl PartialEq for MachineIOError

fn eq(&self, other: &MachineIOError) -> 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 Eq for MachineIOError

impl StructuralPartialEq for MachineIOError