Enum Undefined

#[non_exhaustive]
pub enum Undefined {
    Mod,
    Var,
    Label,
    Filter(usize),
}

Type of an undefined symbol.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Mod

module

Var

variable

Label

label variable

Filter(usize)

filter with arity

Implementations

impl Undefined

pub fn as_str(&self) -> &'static str

String representation of an unexpected symbol type.

Trait Implementations

impl Debug for Undefined

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

Formats the value using the given formatter.