Enum OptionError 

pub enum OptionError {
    NotFound(String),
    AlreadyExists(String),
    ValidationFailed {
        name: String,
        reason: String,
    },
    TypeMismatch {
        name: String,
        expected: &'static str,
        got: &'static str,
    },
    AliasConflict(String),
    ScopeMismatch {
        name: String,
        option_scope: OptionScope,
        requested: OptionScopeId,
    },
}

Error type for option operations.

Variants

NotFound(String)

Option not found in registry.

AlreadyExists(String)

Option already registered.

ValidationFailed

Validation failed.

Fields

name: String

Option name

reason: String

Reason for failure

TypeMismatch

Type mismatch.

Fields

name: String

Option name

expected: &'static str

Expected type

got: &'static str

Actual type

AliasConflict(String)

Alias conflicts with existing name.

ScopeMismatch

Scope mismatch (e.g., setting buffer-local for global-only option).

Fields

name: String

Option name

option_scope: OptionScope

Option’s declared scope

requested: OptionScopeId

Requested scope

Trait Implementations

impl Clone for OptionError

fn clone(&self) -> OptionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OptionError

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

Formats the value using the given formatter.

impl Display for OptionError

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

Formats the value using the given formatter.

impl Error for OptionError

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 OptionError

fn eq(&self, other: &OptionError) -> 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 OptionError

impl StructuralPartialEq for OptionError