Enum egg::RecExprParseError

pub enum RecExprParseError<E> {
    EmptySexp,
    HeadList(Sexp),
    BadOp(E),
    BadSexp(SexpError),
}

An error type for failures when attempting to parse an s-expression as a RecExpr<L>.

Variants

EmptySexp

An empty s-expression was found. Usually this is caused by an empty list “()” somewhere in the input.

HeadList(Sexp)

A list was found where an operator was expected. This is caused by s-expressions of the form “((a b c) d e f).”

BadOp(E)

Attempting to parse an operator into a value of type L failed.

BadSexp(SexpError)

An error occurred while parsing the s-expression itself, generally because the input had an invalid structure (e.g. unpaired parentheses).

Trait Implementations

impl<E: Debug> Debug for RecExprParseError<E>

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

Formats the value using the given formatter.

impl<E> Display for RecExprParseError<E>

where E: Display,

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

Formats the value using the given formatter.

impl<E> Error for RecExprParseError<E>

where E: Error, Self: Debug + Display,

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

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.