Enum MathError 

pub enum MathError {
    UndefinedVariable {
        name: String,
    },
    UndefinedFunction {
        name: String,
    },
    IncorrectArguments,
    DivideByZero,
    NaN,
    CmpError,
    Unimplemented {
        op: String,
        num_type: String,
    },
    Other,
}

An error that can occur while evaluating an expression

Variants

UndefinedVariable

A variable that was not defined in the context was referenced

Fields

name: String

The name of the variable

UndefinedFunction

A function that was not defined in the context was referenced

Fields

name: String

The name of the function

IncorrectArguments

A function was given arguments in an incorrect form

DivideByZero

Attempted to divide by zero

NaN

A NaN value was used in a way that is not possible

CmpError

Tried to compare a value that can’t be compared (eg NaN, Infinity, etc.)

Unimplemented

Attempted an operation on a Number that wasn’t implemented for that type

Fields

op: String

The name of the operation that was attempted

num_type: String

The type of number it was attempted for

Other

Another type of Error occurred.

Trait Implementations

impl Debug for MathError

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

Formats the value using the given formatter.

impl Display for MathError

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

Formats the value using the given formatter.

impl Error for MathError

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.

impl From<MathError> for EvalError

fn from(t: MathError) -> EvalError

Converts to this type from the input type.