Enum Argument 

pub enum Argument {
    Flag(char),
    Option(char, String),
    Line(i64),
    Free(String),
    Stdin,
}

The type of argument encountered.

Variants

Flag(char)

Flag without a value, e.g. -h.

Option(char, String)

An option, or a flag with a value, e.g. -fbar.

Since a flag is always exactly the width of one character, the value will be the strong that follows until a space separator is found. For example -fbar will mean the flag is f with a value of bar.

Line(i64)

Flag indicating a line number location.

This is recognised by a + followed by a positive integer, for example +42.

Free(String)

Position argument that is not a flag or a value associated with a flag.

Stdin

Position argument indicating /dev/stdin, e.g. -.

Implementations

impl Argument

pub fn as_str(&self) -> Option<&str>

Get the flag’s value, if it has one.

Trait Implementations

impl Clone for Argument

fn clone(&self) -> Argument

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Argument

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

Formats the value using the given formatter.

impl Display for Argument

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

Formats the value using the given formatter.

impl PartialEq for Argument

fn eq(&self, other: &Argument) -> 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 Argument