Enum Presence 

pub enum Presence {
    Present,
    Unknown,
    Inapplicable,
}

What a column says about one position.

Variants

Present

A value is recorded.

Unknown

The value exists but was not recorded.

Inapplicable

The field does not apply here.

Implementations

impl Presence

pub const fn is_present(self) -> bool

Returns true when a value is recorded.

Trait Implementations

impl Clone for Presence

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 Presence

impl Debug for Presence

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

Formats the value using the given formatter.

impl Default for Presence

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Presence

impl Hash for Presence

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 PartialEq for Presence

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Presence