Enum Nargs 

pub enum Nargs {
    Precisely(u8),
    Any,
    AtLeastOne,
}

The cardinality of inputs to match for an argument/option.

Inspired by argparse: https://docs.python.org/3/library/argparse.html#nargs

Variants

Precisely(u8)

N: Precisely N values.

Any

*: May be any number of values, including 0.

AtLeastOne

+: At least one value must be specified.

Trait Implementations

impl Clone for Nargs

fn clone(&self) -> Nargs

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Nargs

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

Formats the value using the given formatter.

impl Display for Nargs

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

Formats the value using the given formatter.

impl PartialEq for Nargs

fn eq(&self, other: &Nargs) -> 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 Copy for Nargs

impl Eq for Nargs

impl StructuralPartialEq for Nargs