Enum AstOption

pub enum AstOption<T> {
    None,
    Some(T),
}

This trait is used to replace Option because fmt::Display can not be implemented for Option<T>.

Variants

None

No value

Some(T)

Some value T

Trait Implementations

impl<T: Clone> Clone for AstOption<T>

fn clone(&self) -> AstOption<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for AstOption<T>

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

Formats the value using the given formatter.

impl<T: Display> Display for AstOption<T>

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

Formats the value using the given formatter.

impl<T> From<AstOption<T>> for Option<T>

fn from(val: AstOption<T>) -> Self

Converts to this type from the input type.

impl<T: Hash> Hash for AstOption<T>

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<T: ParseTo> ParseTo for AstOption<T>

fn parse_to(parser: &mut Parser<'_>) -> PResult<Self>

impl<T: PartialEq> PartialEq for AstOption<T>

fn eq(&self, other: &AstOption<T>) -> 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<T: Eq> Eq for AstOption<T>

impl<T> StructuralPartialEq for AstOption<T>