Enum Arg

pub enum Arg<'a> {
    Short(char),
    Long(&'a str),
    Value(OsString),
}

A command line argument found by Parser, either an option or a positional argument.

Variants

Short(char)

A short option, e.g. Short('q') for -q.

Long(&'a str)

A long option, e.g. Long("verbose") for --verbose. (The dashes are not included.)

Value(OsString)

A positional argument, e.g. /dev/null.

Implementations

impl Arg<'_>

pub fn unexpected(self) -> Error

Convert an unexpected argument into an error.

Trait Implementations

impl<'a> Clone for Arg<'a>

fn clone(&self) -> Arg<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Arg<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq for Arg<'a>

fn eq(&self, other: &Arg<'a>) -> 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<'a> Eq for Arg<'a>

impl<'a> StructuralPartialEq for Arg<'a>