Expand description
A single option.
For Opt(x, y)
:
x
isSome
character, orNone
if no option was found.y
isSome
string, orNone
if no argument was expected.
Example
use getopt::prelude::*;
// args = ["program", "-abc", "foo"];
let optstring = "ab:c";
let mut state = State::new();
assert_eq!(Opt(Some('a'), None), getopt(&args, optstring, &mut state)?);
assert_eq!(
Opt(Some('b'), Some("c".to_string())),
getopt(&args, optstring, &mut state)?
);
assert_eq!(Opt(None, None), getopt(&args, optstring, &mut state)?);
Tuple Fields
0: Option<char>
1: Option<String>
Trait Implementations
sourceimpl Ord for Opt
impl Ord for Opt
1.21.0 · sourcefn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Compares and returns the maximum of two values. Read more
1.21.0 · sourcefn min(self, other: Self) -> Selfwhere
Self: Sized,
fn min(self, other: Self) -> Selfwhere
Self: Sized,
Compares and returns the minimum of two values. Read more
1.50.0 · sourcefn clamp(self, min: Self, max: Self) -> Selfwhere
Self: Sized + PartialOrd<Self>,
fn clamp(self, min: Self, max: Self) -> Selfwhere
Self: Sized + PartialOrd<Self>,
Restrict a value to a certain interval. Read more
sourceimpl PartialOrd<Opt> for Opt
impl PartialOrd<Opt> for Opt
sourcefn partial_cmp(&self, other: &Opt) -> Option<Ordering>
fn partial_cmp(&self, other: &Opt) -> Option<Ordering>
1.0.0 · sourcefn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for
self
and other
) and is used by the <=
operator. Read moreimpl Eq for Opt
impl StructuralEq for Opt
impl StructuralPartialEq for Opt
Auto Trait Implementations
impl RefUnwindSafe for Opt
impl Send for Opt
impl Sync for Opt
impl Unpin for Opt
impl UnwindSafe for Opt
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more