Enum SurfaceRequirement 

pub enum SurfaceRequirement {
    Optional,
    Required,
}

Available on crate feature surface-model only.

Whether Clap requires an argument, as SurfaceArgument::requirement reports.

The set is closed, and the enum is not #[non_exhaustive]: Clap marks an argument required or leaves it optional.

Variants

Optional

The invocation can omit this argument.

Required

The invocation must provide this argument.

Trait Implementations

impl Clone for SurfaceRequirement

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 SurfaceRequirement

impl Debug for SurfaceRequirement

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

Formats the value using the given formatter.

impl Eq for SurfaceRequirement

impl PartialEq for SurfaceRequirement

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for SurfaceRequirement

Available on crate feature surface-serde only.

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 SurfaceRequirement