pub struct RangedI64ValueParser<T: TryFrom<i64> + Clone + Send + Sync = i64> { /* private fields */ }
Expand description

Parse number that fall within a range of values

NOTE: To capture negative values, you will also need to set Arg::allow_negative_numbers or Arg::allow_hyphen_values.

Example

Usage:

let mut cmd = clap::Command::new("raw")
    .arg(
        clap::Arg::new("port")
            .long("port")
            .value_parser(clap::value_parser!(u16).range(3000..))
            .action(clap::ArgAction::Set)
            .required(true)
    );

let m = cmd.try_get_matches_from_mut(["cmd", "--port", "3001"]).unwrap();
let port: u16 = *m.get_one("port")
    .expect("required");
assert_eq!(port, 3001);

Semantics:

let value_parser = clap::builder::RangedI64ValueParser::<i32>::new().range(-1..200);
assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("random")).is_err());
assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("")).is_err());
assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("-200")).is_err());
assert!(value_parser.parse_ref(&cmd, arg, OsStr::new("300")).is_err());
assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("-1")).unwrap(), -1);
assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("0")).unwrap(), 0);
assert_eq!(value_parser.parse_ref(&cmd, arg, OsStr::new("50")).unwrap(), 50);

Implementations§

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impl<T: TryFrom<i64> + Clone + Send + Sync> RangedI64ValueParser<T>

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pub fn new() -> Self

Select full range of i64

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pub fn range<B: RangeBounds<i64>>(self, range: B) -> Self

Narrow the supported range

Trait Implementations§

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impl<T: Clone + TryFrom<i64> + Clone + Send + Sync> Clone for RangedI64ValueParser<T>

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fn clone(&self) -> RangedI64ValueParser<T>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T: Debug + TryFrom<i64> + Clone + Send + Sync> Debug for RangedI64ValueParser<T>

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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<T: TryFrom<i64> + Clone + Send + Sync> Default for RangedI64ValueParser<T>

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<T: TryFrom<i64> + Clone + Send + Sync, B: RangeBounds<i64>> From<B> for RangedI64ValueParser<T>

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fn from(range: B) -> Self

Converts to this type from the input type.
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impl<T: TryFrom<i64> + Clone + Send + Sync + 'static> TypedValueParser for RangedI64ValueParser<T>where <T as TryFrom<i64>>::Error: Send + Sync + 'static + Error + ToString,

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type Value = T

Argument’s value type
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fn parse_ref( &self, cmd: &Command, arg: Option<&Arg>, raw_value: &OsStr ) -> Result<Self::Value, Error>

Parse the argument value Read more
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fn parse( &self, cmd: &Command, arg: Option<&Arg>, value: OsString ) -> Result<Self::Value, Error>

Parse the argument value Read more
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fn possible_values( &self ) -> Option<Box<dyn Iterator<Item = PossibleValue> + '_>>

Reflect on enumerated value properties Read more
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fn map<T, F>(self, func: F) -> MapValueParser<Self, F>where T: Send + Sync + Clone, F: Fn(Self::Value) -> T + Clone,

Adapt a TypedValueParser from one value to another Read more
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fn try_map<T, E, F>(self, func: F) -> TryMapValueParser<Self, F>where F: Fn(Self::Value) -> Result<T, E> + Clone + Send + Sync + 'static, T: Send + Sync + Clone, E: Into<Box<dyn Error + Send + Sync + 'static>>,

Adapt a TypedValueParser from one value to another Read more
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impl<T: Copy + TryFrom<i64> + Clone + Send + Sync> Copy for RangedI64ValueParser<T>

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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 Twhere 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 Twhere T: Clone,

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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, U> TryFrom<U> for Twhere U: Into<T>,

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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 Twhere U: TryFrom<T>,

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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.