Enum ValueKind 

pub enum ValueKind {
    None,
    Required,
    Optional,
}

Whether a flag takes a value, and if so, whether it’s required.

Variants

None

The flag is a boolean switch; it takes no value.

Required

The flag must be given a value.

Optional

The flag may optionally be given a value.

Trait Implementations

impl Clone for ValueKind

fn clone(&self) -> ValueKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ValueKind

impl Debug for ValueKind

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

Formats the value using the given formatter.

impl Default for ValueKind

fn default() -> ValueKind

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ValueKind

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ValueKind

impl PartialEq for ValueKind

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ValueKind

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ValueKind