Struct WasmError 

pub struct WasmError {
    pub code: ErrorCode,
    pub message: String,
    pub details: Option<String>,
    pub recoverable: bool,
}

A structured WASM error.

Fields

code: ErrorCode

Error category.

message: String

Human-readable message.

details: Option<String>

Optional additional detail (stack trace, inner error, etc.).

recoverable: bool

true if the caller may retry or recover; false for fatal errors.

Implementations

impl WasmError

pub fn new(code: ErrorCode, message: impl Into<String>) -> Self

Create a new, recoverable error.

pub fn with_details(self, details: impl Into<String>) -> Self

Attach additional detail text (builder pattern).

pub fn unrecoverable(self) -> Self

Mark the error as unrecoverable (builder pattern).

pub fn to_json(&self) -> String

Serialise to a compact JSON string.

pub fn from_code(code: u32, message: &str) -> Option<Self>

Convenience constructor: attempt to build from a numeric code.

Returns None when code does not map to a known ErrorCode.

pub fn is_client_error(&self) -> bool

Returns true for “client-side” errors: codes 1, 4, 7, 8.

pub fn is_server_error(&self) -> bool

Returns true for “server/transport” errors: codes 2, 5, 6.

Trait Implementations

impl Clone for WasmError

fn clone(&self) -> WasmError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WasmError

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

Formats the value using the given formatter.

impl Display for WasmError

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

Formats the value using the given formatter.

impl Error for WasmError

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.