Enum FcError 

pub enum FcError {
    InvalidInput {
        message: String,
    },
    Unsupported {
        message: String,
    },
    OutOfBounds {
        message: String,
    },
}

The structured error every crate in the workspace returns across the boundary.

A String across a WASM boundary loses the distinction between “the user typed something invalid” and “we have a bug”, and those need different handling at each end. This is serialized rather than thrown so the JS side can branch on kind without string matching.

Variants

InvalidInput

Well-formed but semantically invalid, e.g. a range with end before start. Usually the caller’s fault and worth surfacing to the user.

Fields

message: String

Unsupported

Cannot be satisfied in the current state, e.g. undo on an empty history. Expected in normal operation.

Fields

message: String

OutOfBounds

An index outside the bounds of a document or model. Indicates a bug, so it is logged rather than displayed.

Fields

message: String

Implementations

impl FcError

pub fn kind(&self) -> &'static str

A short machine-readable tag, for callers that branch without parsing.

pub fn message(&self) -> &str

The human-facing message, without the kind prefix.

Trait Implementations

impl Clone for FcError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FcError

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FcError

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<FcError> for JsValue

Available on crate feature bindgen only.

fn from(err: FcError) -> Self

A tagged primitive retains classification without linking JS object APIs.

impl Serialize for FcError

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.