Enum mexprp::errors::MathError

pub enum MathError {
    UndefinedVariable {
        name: String,
    },
    UndefinedFunction {
        name: String,
    },
    IncorrectArguments,
    DivideByZero,
    NaN,
    Other,
}

An error that can occur while evaluating an expression

Variants

UndefinedVariable

A variable that was not defined in the context was referenced

Fields of UndefinedVariable

name: String

The name of the variable

UndefinedFunction

A function that was not defined in the context was referenced

Fields of UndefinedFunction

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

Other

Another type of Error occurred.

Trait Implementations

impl Debug for MathError

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Fail for MathError

fn cause(&self) -> Option<&Fail>

Returns a reference to the underlying cause of this failure, if it is an error that wraps other errors.

fn backtrace(&self) -> Option<&Backtrace>

Returns a reference to the Backtrace carried by this failure, if it carries one.

fn context<D>(self, context: D) -> Context<D> where
    D: Display + Send + Sync + 'static, 

Provides context for this failure.

fn compat(self) -> Compat<Self>

Wraps this failure in a compatibility wrapper that implements std::error::Error.

fn causes(&self) -> Causes

Returns a iterator over the causes of this Fail with itself as the first item and the root_cause as the final item.

fn root_cause(&self) -> &(Fail + 'static)

Returns the "root cause" of this Fail - the last value in the cause chain which does not return an underlying cause.

impl Display for MathError

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

Formats the value using the given formatter.

impl From<MathError> for EvalError

fn from(t: MathError) -> EvalError

Performs the conversion.