Enum EvalError 

pub enum EvalError {
    SyntaxError {
        expression: String,
        reason: String,
    },
    UndefinedVariable(String),
    UndefinedFunction(String),
    TypeError {
        expected: String,
        got: String,
    },
    DivisionByZero,
    EvalFailed(String),
}

Errors that can occur during expression evaluation.

Variants

SyntaxError

Syntax error in expression

Fields

expression: String

reason: String

UndefinedVariable(String)

Undefined variable

UndefinedFunction(String)

Undefined function

TypeError

Type mismatch

Fields

expected: String

got: String

DivisionByZero

Division by zero

EvalFailed(String)

Generic evaluation error

Trait Implementations

impl Clone for EvalError

fn clone(&self) -> EvalError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EvalError

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

Formats the value using the given formatter.

impl Display for EvalError

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

Formats the value using the given formatter.

impl Error for EvalError

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<EvalexprError> for EvalError

fn from(err: EvalexprError) -> Self

Converts to this type from the input type.

impl PartialEq for EvalError

fn eq(&self, other: &EvalError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for EvalError