Struct ValueRange

pub struct ValueRange { /* private fields */ }

Values per occurrence for an argument

Implementations

impl ValueRange

pub const EMPTY: Self = _

Nor argument values, or a flag

pub const SINGLE: Self = _

A single argument value, the most common case for options

pub fn new(range: impl Into<Self>) -> Self

Create a range

Panics

If the end is less than the start (debug builds)

Examples

let range = ValueRange::new(5);
let range = ValueRange::new(5..10);
let range = ValueRange::new(5..=10);
let range = ValueRange::new(5..);
let range = ValueRange::new(..10);
let range = ValueRange::new(..=10);

While this will panic:

let range = ValueRange::new(10..5);  // Panics!

pub fn min_values(&self) -> usize

Fewest number of values the argument accepts

pub fn max_values(&self) -> usize

Most number of values the argument accepts

pub fn takes_values(&self) -> bool

Report whether the argument takes any values (ie is a flag)

Examples

let range = ValueRange::new(5);
assert!(range.takes_values());

let range = ValueRange::new(0);
assert!(!range.takes_values());

Trait Implementations

impl Clone for ValueRange

fn clone(&self) -> ValueRange

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ValueRange

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

Formats the value using the given formatter.

impl Default for ValueRange

fn default() -> Self

Returns the “default value” for a type.

impl Display for ValueRange

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

Formats the value using the given formatter.

impl From<Range<usize>> for ValueRange

fn from(range: Range<usize>) -> Self

Converts to this type from the input type.

impl From<RangeFrom<usize>> for ValueRange

fn from(range: RangeFrom<usize>) -> Self

Converts to this type from the input type.

impl From<RangeFull> for ValueRange

fn from(_: RangeFull) -> Self

Converts to this type from the input type.

impl From<RangeInclusive<usize>> for ValueRange

fn from(range: RangeInclusive<usize>) -> Self

Converts to this type from the input type.

impl From<RangeTo<usize>> for ValueRange

fn from(range: RangeTo<usize>) -> Self

Converts to this type from the input type.

impl From<RangeToInclusive<usize>> for ValueRange

fn from(range: RangeToInclusive<usize>) -> Self

Converts to this type from the input type.

impl From<usize> for ValueRange

fn from(fixed: usize) -> Self

Converts to this type from the input type.

impl Hash for ValueRange

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ValueRange

fn eq(&self, other: &ValueRange) -> 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 RangeBounds<usize> for ValueRange

fn start_bound(&self) -> Bound<&usize>

Start index bound.

fn end_bound(&self) -> Bound<&usize>

End index bound.

fn contains<U>(&self, item: &U) -> bool

where T: PartialOrd<U>, U: PartialOrd<T> + ?Sized,

Returns true if item is contained in the range.

impl Copy for ValueRange

impl Eq for ValueRange

impl StructuralPartialEq for ValueRange

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes