Enum Error 

pub enum Error {
    UnexpectedChar {
        at: Position,
        ch: char,
    },
    UnexpectedEnd {
        expected: &'static str,
    },
    UnexpectedToken {
        at: Position,
        expected: &'static str,
        found: String,
    },
    UnboundVariable {
        name: VarName,
    },
    FuelExhausted {
        limit: u64,
    },
    DanglingReference {
        address: Address,
    },
    NotAReference {
        found: String,
    },
    NotAFunction {
        found: String,
    },
    NotAnObject {
        found: String,
    },
    PropertyNotFound {
        name: VarName,
    },
    Thrown(Box<ThrownPayload>),
    UncaughtException {
        value: Value,
    },
}

All errors in lambda-throw-cat.

Variants

UnexpectedChar

The lexer encountered a character that does not begin any token.

Fields

at: Position

Byte offset.

ch: char

The offending character.

UnexpectedEnd

Input ended while the parser still required more tokens.

Fields

expected: &'static str

What was expected.

UnexpectedToken

The parser found a token that does not satisfy the current production.

Fields

at: Position

Byte offset.

expected: &'static str

What was expected.

found: String

Token that was actually found.

UnboundVariable

Evaluation referenced a variable not bound in the current environment.

Fields

name: VarName

The unbound name.

FuelExhausted

Evaluation exceeded its step budget.

Fields

limit: u64

The configured step limit.

DanglingReference

A dereference, store, field access, or field assignment targeted an address not present in the heap.

Fields

address: Address

The address that could not be resolved.

NotAReference

Dereference or assignment was attempted on a value that is not a cell reference.

Fields

found: String

Rendering of the offending non-reference value.

NotAFunction

Application was attempted with a non-function value.

Fields

found: String

Rendering of the offending non-function value.

NotAnObject

Field access or extend targeted a value that is not (or does not resolve to) an object.

Fields

found: String

Rendering of the offending non-object value.

PropertyNotFound

Field access walked the prototype chain to its end without finding the requested property.

Fields

name: VarName

The missing property name.

Thrown(Box<ThrownPayload>)

A throw is propagating up the evaluation stack. Carries a boxed ThrownPayload with the value, heap, and fuel at the throw site so an enclosing try-catch can resume from there. Boxed to keep the Result discriminant small.

UncaughtException

A throw escaped the top-level evaluation without being caught.

Fields

value: Value

The value that was thrown.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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 Error

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

impl StructuralPartialEq for Error