Struct RuntimeError

pub struct RuntimeError { /* private fields */ }

A struct representing an aborted instruction execution, with a message indicating the cause.

Implementations

impl RuntimeError

pub fn new<I: Into<String>>(message: I) -> Self

Creates a new generic RuntimeError with the given message.

Example

let trap = wasmer_engine::RuntimeError::new("unexpected error");
assert_eq!("unexpected error", trap.message());

pub fn from_trap(trap: Trap) -> Self

Create a new RuntimeError from a Trap.

pub fn raise(error: Box<dyn Error + Send + Sync>) -> !

👎Deprecated since 2.1.1: return a Result from host functions instead

Raises a custom user Error

pub fn user(error: Box<dyn Error + Send + Sync>) -> Self

Creates a custom user Error.

This error object can be passed through Wasm frames and later retrieved using the downcast method.

pub fn message(&self) -> String

Returns a reference the message stored in Trap.

pub fn trace(&self) -> &[FrameInfo]

Returns a list of function frames in WebAssembly code that led to this trap happening.

pub fn downcast<T: Error + 'static>(self) -> Result<T, Self>

Attempts to downcast the RuntimeError to a concrete type.

pub fn to_trap(self) -> Option<TrapCode>

Returns trap code, if it’s a Trap

pub fn is<T: Error + 'static>(&self) -> bool

Returns true if the RuntimeError is the same as T

Trait Implementations

impl Clone for RuntimeError

fn clone(&self) -> RuntimeError

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for RuntimeError

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

Formats the value using the given formatter.

impl Display for RuntimeError

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

Formats the value using the given formatter.

impl Error for RuntimeError

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<Trap> for RuntimeError

fn from(trap: Trap) -> Self

Converts to this type from the input type.