Enum EvalError 

pub enum EvalError {
    UnboundVar(VarId),
    ArityMismatch {
        context: &'static str,
        expected: usize,
        got: usize,
    },
    TypeMismatch {
        expected: &'static str,
        got: ValueKind,
    },
    NoMatchingAlt,
    InfiniteLoop(ThunkId),
    UnsupportedPrimOp(PrimOpKind),
    HeapExhausted,
    NotAFunction,
    UnboundJoin(JoinId),
    UserError,
    Undefined,
    DepthLimit,
    InternalError(String),
}

Evaluation error.

Variants

UnboundVar(VarId)

Variable not found in environment

ArityMismatch

Arity mismatch (wrong number of arguments or fields)

Fields

context: &'static str

expected: usize

got: usize

TypeMismatch

Type mismatch during evaluation

Fields

expected: &'static str

got: ValueKind

NoMatchingAlt

No matching alternative in case expression

InfiniteLoop(ThunkId)

Infinite loop detected (thunk forced itself)

UnsupportedPrimOp(PrimOpKind)

Unsupported primop

HeapExhausted

Heap exhausted

NotAFunction

Application of non-function value

UnboundJoin(JoinId)

Jump to unknown join point

UserError

Haskell error "..." called

Undefined

Haskell undefined forced

DepthLimit

Recursion depth limit exceeded during deep_force

InternalError(String)

Internal invariant violation (should never happen)

Trait Implementations

impl Clone for EvalError

fn clone(&self) -> EvalError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EvalError

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

Formats the value using the given formatter.

impl Display for EvalError

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

Formats the value using the given formatter.

impl Error for EvalError

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.