Enum ErrorKind 

pub enum ErrorKind {
    Return(ConValue),
    Break(ConValue),
    BadBreak(ConValue),
    Continue,
    StackUnderflow,
    StackOverflow(usize),
    ScopeExit,
    TypeError(&'static str, &'static str),
    NotIterable,
    NotIndexable,
    OobIndex(usize, usize),
    NotPlace,
    NotDefined(Symbol),
    NotInitialized(Symbol),
    NotCallable(ConValue),
    ArgNumber {
        want: usize,
        got: usize,
    },
    PatFailed(Box<Pat>),
    MatchNonexhaustive(ConValue),
    Panic(String, usize),
    BuiltinError(String),
}

Represents any error thrown by the Environment

Variants

Return(ConValue)

Propagate a Return value

Break(ConValue)

Propagate a Break value

BadBreak(ConValue)

Break propagated across function bounds

Continue

Continue to the next iteration of a loop

StackUnderflow

Underflowed the stack

StackOverflow(usize)

Overflowed the stack

ScopeExit

Exited the last scope

TypeError(&'static str, &'static str)

Type incompatibility

NotIterable

In clause of For loop didn’t yield a Range

NotIndexable

A value could not be indexed

OobIndex(usize, usize)

An array index went out of bounds

NotPlace

An expression is not assignable

NotDefined(Symbol)

A name was not defined in scope before being used

NotInitialized(Symbol)

A name was defined but not initialized

NotCallable(ConValue)

A value was called, but is not callable

ArgNumber

A function was called with the wrong number of arguments

Fields

want: usize

got: usize

PatFailed(Box<Pat>)

A pattern failed to match

MatchNonexhaustive(ConValue)

Fell through a non-exhaustive match

Panic(String, usize)

Explicit panic

BuiltinError(String)

Error produced by a Builtin

Trait Implementations

impl Clone for ErrorKind

fn clone(&self) -> ErrorKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ErrorKind

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

Formats the value using the given formatter.

impl Display for ErrorKind

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

Formats the value using the given formatter.

impl Error for ErrorKind

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.