Enum StateKeyError 

pub enum StateKeyError {
    Empty,
    UnknownScope {
        prefix: String,
        name: String,
    },
    ControlCharacter,
    TooLong {
        len: usize,
        max: usize,
    },
}

Why a string is not usable as a state key.

Variants

Empty

UnknownScope

A prefix that looks like a scope and is not one.

Refused rather than read as part of the name: app:tone treated as an ordinary key is stored under a name that says it is scoped to the application and is not, which is the mistake the prefixes exist to make visible.

Fields

prefix: String

name: String

ControlCharacter

TooLong

Fields

len: usize

max: usize

Trait Implementations

impl Clone for StateKeyError

fn clone(&self) -> StateKeyError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StateKeyError

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

Formats the value using the given formatter.

impl Display for StateKeyError

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

Formats the value using the given formatter.

impl Eq for StateKeyError

impl Error for StateKeyError

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 StateKeyError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for StateKeyError