Enum EvalError

pub enum EvalError<E1, E2> {
    InvalidVariableValue(String),
    Overflow,
    DivisionByZero,
    LeftShiftingNegative,
    ReverseShifting,
    AssignmentToValue,
    GetVariableError(E1),
    AssignVariableError(E2),
}

Cause of an evaluation error

The type parameters E1 and E2 define the types of errors returned by the Env::get_variable and Env::assign_variable methods, respectively.

Variants

InvalidVariableValue(String)

A variable value that is not a valid number

Overflow

Result out of bounds

DivisionByZero

Division by zero

LeftShiftingNegative

Left bit-shifting with a negative left-hand-side operand

ReverseShifting

Bit-shifting with a negative right-hand-side operand

AssignmentToValue

Assignment with a left-hand-side operand not being a variable

GetVariableError(E1)

Error accessing a variable value.

The associated value is the error returned by the Env::get_variable method.

AssignVariableError(E2)

Error assigning a variable value.

The associated value is the error returned by the Env::assign_variable method.

Trait Implementations

impl<E1: Clone, E2: Clone> Clone for EvalError<E1, E2>

fn clone(&self) -> EvalError<E1, E2>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<E1: Debug, E2: Debug> Debug for EvalError<E1, E2>

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

Formats the value using the given formatter.

impl<E1, E2> Display for EvalError<E1, E2>

where E1: Display, E2: Display,

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

Formats the value using the given formatter.

impl<E1, E2> Error for EvalError<E1, E2>

where E1: Error, E2: Error, Self: Debug + Display,

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<E1, E2> From<EvalError<E1, E2>> for ErrorCause<E1, E2>

fn from(source: EvalError<E1, E2>) -> Self

Converts to this type from the input type.

impl<E1: Hash, E2: Hash> Hash for EvalError<E1, E2>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<E1: PartialEq, E2: PartialEq> PartialEq for EvalError<E1, E2>

fn eq(&self, other: &EvalError<E1, E2>) -> 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<E1: Eq, E2: Eq> Eq for EvalError<E1, E2>

impl<E1, E2> StructuralPartialEq for EvalError<E1, E2>