Enum CalcError 

pub enum CalcError {
    NameNotFound(String),
    NameAlreadyBound(String),
    IncorrectArity(usize, usize),
    ParseNum,
    ParseError,
    IOError,
    Unknown,
}

The error type returned when functions in this crate go wrong.

Variants

NameNotFound(String)

Symbol is not in context.

NameAlreadyBound(String)

Use tried to assign a value to a name that already has a value assigned to it.

IncorrectArity(usize, usize)

Function called with incorrect number of arguments. IncorrectArity(expected, found).

ParseNum

There was an error when parsing a number.

ParseError

There was a parsing error.

IOError

An error with IO like stdin not working.

Unknown

Error in astro_float.

Trait Implementations

impl Clone for CalcError

fn clone(&self) -> CalcError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CalcError

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

Formats the value using the given formatter.

impl Display for CalcError

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

Formats the value using the given formatter.

impl Error for CalcError

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.