Enum Error 

pub enum Error {
    SimplifyLimitExceeded,
    ParseError(String),
    RedexNotFound,
    InvalidRedex(u32, String),
    InvalidDisplayExp,
    InvalidInnerType,
    VarNotFound(String, u32),
}

Error type.

Variants

SimplifyLimitExceeded

Too many reductions

ParseError(String)

Can’t parse expression

RedexNotFound

Can’t find beta redex. Note that this error is often recovered as we will try to find anthor beta redex in the current expression.

InvalidRedex(u32, String)

Invalid redex

InvalidDisplayExp

Invalid display expression

InvalidInnerType

Invalid inner type of display expression

VarNotFound(String, u32)

Can’t find variable when doing replacement

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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.