Enum Syntax 

#[non_exhaustive]
pub enum Syntax {
    Basic,
    Extended,
}

which syntax an expression is written in

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.

Basic

POSIX basic (grep): ( ) { } | + ? are the operators

Extended

POSIX extended (grep -E, egrep)

Trait Implementations

impl Clone for Syntax

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Syntax

impl Debug for Syntax

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

Formats the value using the given formatter.

impl Eq for Syntax

impl PartialEq for Syntax

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Syntax