Enum EvalError 

#[non_exhaustive]
pub enum EvalError {
    PathNotFound(String),
    InvalidPath(String),
    NonBoolCond(Value),
    TypeError {
        op: String,
        msg: String,
    },
    ArithError {
        op: String,
        msg: String,
    },
    DispatcherError {
        ref_: String,
        msg: String,
    },
    ExternError {
        ref_: String,
        msg: String,
    },
}

Evaluation error.

#[non_exhaustive]: new variants may be added in a minor release: match with a wildcard arm.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

PathNotFound(String)

A Path read did not resolve — the requested key is missing from ctx.

InvalidPath(String)

A Path string is malformed — see Path for the full syntax + rejection rules. Raised by the read_path / write_path compat wrappers when their &str argument fails to parse; never raised by Path::read / Path::write themselves (an already-parsed Path cannot represent malformed syntax).

NonBoolCond(Value)

Branch.cond evaluated to a non-boolean value.

TypeError

An expression or node received a value of the wrong type (e.g. a Len/In/comparison/arithmetic operand of the wrong JSON type, or a Fanout.items result that did not evaluate to an array).

Fields

op: String

The op (or synthetic label, e.g. "fanout.any") that raised.

msg: String

Human-readable description of the type mismatch.

ArithError

An arithmetic operation failed (division/modulo by zero, or a numeric result/operand that cannot be represented as f64).

Fields

op: String

The op (e.g. "div", "mod", "cmp") that raised.

msg: String

Human-readable description of the arithmetic failure.

DispatcherError

The Dispatcher returned an error for the given Step.ref.

Fields

ref_: String

The Step.ref that raised.

msg: String

The dispatcher’s error message.

ExternError

The Externs registry raised for the given call_extern.ref (e.g. unregistered ref, or the extern fn itself returned an error).

Fields

ref_: String

The call_extern.ref that raised.

msg: String

The extern fn’s error message.

Trait Implementations

impl Debug for EvalError

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

Formats the value using the given formatter.

impl Display for EvalError

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

Formats the value using the given formatter.

impl Error for EvalError

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.