Enum EvalError

pub enum EvalError {
    DivisionByZero,
    UndefinedFunction {
        ident: String,
    },
    ArgCountDoesNotMatch {
        ident: &'static str,
        expected: usize,
        actual: usize,
    },
    VariableNotFound {
        ident: String,
    },
}

Error in eval stage.

Variants

DivisionByZero

zero division occurred. ‘100 / 0’

UndefinedFunction

undefined function called. ‘foo(100)’

Fields

ident: String

Undefined function identifier.

ArgCountDoesNotMatch

Expected args not provided. ‘pow(2)’

Fields

ident: &'static str

Evaluated function identifier.

expected: usize

Expected arg count.

actual: usize

Actual arg count.

VariableNotFound

Given variable not found in scope.

Fields

ident: String

Evaluated variable identifier.

Trait Implementations

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 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