Enum ExtFnError 

pub enum ExtFnError {
    NotFound(String),
    ArityMismatch {
        name: String,
        expected: usize,
        got: usize,
    },
    TypeMismatch {
        name: String,
        position: usize,
        expected: ValueType,
        got: Option<ValueType>,
    },
    LanguageUnavailable(String),
    Runtime {
        message: String,
        stderr: String,
    },
    Timeout(Duration),
    Sandbox(String),
}

Errors from resolving or evaluating an external function. The engine will convert these to a Value::Error at the call site (see error_value); this API returns Result so the caller decides.

Variants

NotFound(String)

ArityMismatch

Fields

name: String

expected: usize

got: usize

TypeMismatch

Fields

name: String

position: usize

expected: ValueType

got: Option<ValueType>

LanguageUnavailable(String)

Runtime

Fields

message: String

stderr: String

Timeout(Duration)

Sandbox(String)

The OS sandbox the host policy requires is unavailable (fail closed).

Trait Implementations

impl Debug for ExtFnError

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

Formats the value using the given formatter.

impl Display for ExtFnError

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

Formats the value using the given formatter.

impl Error for ExtFnError

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.