Enum OpenError 

pub enum OpenError {
    Engine(String),
    Migration {
        step: usize,
        reason: String,
    },
    Invalid(String),
}

The error the substrate’s constructors fail with (open, reactivity start, adapter construction, construction-time migrations).

Variants

Engine(String)

An engine open or a reactivity start failed at construction (the substrate’s open fails loudly — the family posture ADR-024 §1 records as established).

Migration

A construction-time migration step failed (loud — the store refuses service; ADR-024 §1). step is the ordered step’s position; concurrent-open races do not surface here (the re-key verification swallows the benign case — ADR-024 §3).

Fields

step: usize

The position of the failing step in the ordered set.

reason: String

The engine failure’s message (message-only — no engine source types on the surface).

Invalid(String)

Invalid construction input (a path or options shape a constructor rejects before touching the engine).

Trait Implementations

impl Clone for OpenError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OpenError

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

Formats the value using the given formatter.

impl Display for OpenError

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

Formats the value using the given formatter.

impl Eq for OpenError

impl Error for OpenError

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 OpenError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OpenError