# Struct clap::builder::ValueRange

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    pub struct ValueRange { /* private fields */ }

Expand description

Values per occurrence for an argument

## Implementations

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### impl ValueRange

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#### pub const EMPTY: Self = _

Nor argument values, or a flag

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#### pub const SINGLE: Self = _

A single argument value, the most common case for options

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

Create a range

##### Panics

If the end is less than the start

##### 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!

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#### pub fn min_values(&self) -> usize

Fewest number of values the argument accepts

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#### pub fn max_values(&self) -> usize

Most number of values the argument accepts

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#### 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

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### impl Clone for ValueRange

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#### fn clone(&self) -> ValueRange

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from `source`. Read more

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### impl Debug for ValueRange

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

Formats the value using the given formatter. Read more

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### impl Default for ValueRange

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#### fn default() -> Self

Returns the “default value” for a type. Read more

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### impl Display for ValueRange

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

Formats the value using the given formatter. Read more

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### impl From<Range<usize>> for ValueRange

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

Converts to this type from the input type.

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### impl From<RangeFrom<usize>> for ValueRange

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

Converts to this type from the input type.

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### impl From<RangeFull> for ValueRange

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#### fn from(_: RangeFull) -> Self

Converts to this type from the input type.

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### impl From<RangeInclusive<usize>> for ValueRange

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

Converts to this type from the input type.

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### impl From<RangeTo<usize>> for ValueRange

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

Converts to this type from the input type.

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### impl From<RangeToInclusive<usize>> for ValueRange

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

Converts to this type from the input type.

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### impl From<usize> for ValueRange

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#### fn from(fixed: usize) -> Self

Converts to this type from the input type.

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### impl Hash for ValueRange

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

Feeds this value into the given `Hasher`. Read more

1.3.0 · source

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

Feeds a slice of this type into the given `Hasher`. Read more

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### impl<I: Into<ValueRange>> IntoResettable<ValueRange> for I

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#### fn into_resettable(self) -> Resettable<ValueRange>

Convert to the intended resettable type

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### impl PartialEq<ValueRange> for ValueRange

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#### fn eq(&self, other: &ValueRange) -> bool

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

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#### fn ne(&self, other: &ValueRange) -> bool

This method tests for `!=`.

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### impl RangeBounds<usize> for ValueRange

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

Start index bound. Read more

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

End index bound. Read more

1.35.0 · source

#### fn contains<U>(&self, item: &U) -> bool where
T: PartialOrd<U>,
U: PartialOrd<T> + ?Sized,

Returns `true` if `item` is contained in the range. Read more

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### impl Copy for ValueRange

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### impl Eq for ValueRange

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### impl StructuralEq for ValueRange

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### impl StructuralPartialEq for ValueRange

## Auto Trait Implementations

### impl RefUnwindSafe for ValueRange

### impl Send for ValueRange

### impl Sync for ValueRange

### impl Unpin for ValueRange

### impl UnwindSafe for ValueRange

## Blanket Implementations

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### impl<T> Any for T where
T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more

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### impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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### impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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### impl<T> From<T> for T

const: unstable · source

#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> ToOwned for T where
T: Clone,

#### type Owned = T

The resulting type after obtaining ownership.

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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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### impl<T> ToString for T where
T: Display + ?Sized,

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#### default fn to_string(&self) -> String

Converts the given value to a `String`. Read more

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### impl<T, U> TryFrom<U> for T where
U: Into<T>,

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

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### impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.