Enum OptValueType 

pub enum OptValueType {
    None,
    Optional,
    Required,
}

Option’s value type.

See OptSpecs::option method for more information.

Variants

None

Option does not accept a value.

Optional

Option accepts an optional value.

Required

Option requires a value.

Trait Implementations

impl Debug for OptValueType

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

Formats the value using the given formatter.

impl PartialEq for OptValueType

fn eq(&self, other: &OptValueType) -> 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 StructuralPartialEq for OptValueType