Enum DomainError 

pub enum DomainError {
    Run(RunError),
    NotAMap {
        found: &'static str,
    },
    KeyNotALabel {
        found: &'static str,
    },
    Unrepresentable {
        field: String,
        found: &'static str,
    },
    Refused {
        keyword: &'static str,
        message: String,
    },
}

Why a blue value could not become a domain type.

Variants

Run(RunError)

The blue program itself failed to parse, type-check or run.

NotAMap

A domain is built from a map; the program produced something else.

Fields

found: &'static str

KeyNotALabel

A map key blue can write that a domain cannot name (a number, a string).

Fields

found: &'static str

Unrepresentable

A value with no Lisp spelling: a function, a promise, an error object.

Fields

field: String

found: &'static str

Refused

The form was well-shaped and the domain still refused it: an unknown field, a missing required one, a wrong type. The message is the domain’s own, which names the field.

Fields

keyword: &'static str

message: String

Trait Implementations

impl Debug for DomainError

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

Formats the value using the given formatter.

impl Display for DomainError

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

Formats the value using the given formatter.

impl Error for DomainError

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<RunError> for DomainError

fn from(source: RunError) -> Self

Converts to this type from the input type.