Enum Trap 

pub enum Trap {
    Code(TrapCode),
    Host(Box<dyn HostError>),
}

Error type which can be thrown by wasm code or by host environment.

Under some conditions, wasm execution may produce a Trap, which immediately aborts execution. Traps can’t be handled by WebAssembly code, but are reported to the embedder.

Variants

Code(TrapCode)

Traps during Wasm execution.

Host(Box<dyn HostError>)

Traps and errors during host execution.

Implementations

impl Trap

pub fn host<U>(host_error: U) -> Trap

where U: HostError,

Wraps the host error in a Trap.

pub fn is_host(&self) -> bool

Returns true if self trap originating from host code.

pub fn code(&self) -> Option<TrapCode>

Returns the TrapCode traps originating from Wasm execution.

Trait Implementations

impl Debug for Trap

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

Formats the value using the given formatter.

impl Display for Trap

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

Formats the value using the given formatter.

impl Error for Trap

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

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 Error

fn from(e: Trap) -> Error

Converts to this type from the input type.

impl From<Trap> for ResumableError

fn from(trap: Trap) -> Self

Converts to this type from the input type.

impl From<TrapCode> for Trap

fn from(error: TrapCode) -> Trap

Converts to this type from the input type.

impl<U> From<U> for Trap

where U: HostError,

fn from(e: U) -> Trap

Converts to this type from the input type.