Struct clap::builder::RangedU64ValueParser
source · Expand description
Parse number that fall within a range of values
Example
Usage:
let mut cmd = clap::Command::new("raw")
.arg(
clap::Arg::new("port")
.long("port")
.value_parser(clap::value_parser!(u64).range(3000..))
.takes_value(true)
.required(true)
);
let m = cmd.try_get_matches_from_mut(["cmd", "--port", "3001"]).unwrap();
let port: u64 = *m.get_one("port")
.expect("required");
assert_eq!(port, 3001);
Semantics:
let value_parser = clap::builder::RangedU64ValueParser::<u32>::new().range(0..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!(value_parser.parse_ref(&cmd, arg, OsStr::new("-1")).is_err());
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§
Trait Implementations§
source§impl<T: Clone + TryFrom<u64>> Clone for RangedU64ValueParser<T>
impl<T: Clone + TryFrom<u64>> Clone for RangedU64ValueParser<T>
source§fn clone(&self) -> RangedU64ValueParser<T>
fn clone(&self) -> RangedU64ValueParser<T>
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl<T: TryFrom<u64>, B: RangeBounds<u64>> From<B> for RangedU64ValueParser<T>
impl<T: TryFrom<u64>, B: RangeBounds<u64>> From<B> for RangedU64ValueParser<T>
source§impl<T: TryFrom<u64> + Clone + Send + Sync + 'static> TypedValueParser for RangedU64ValueParser<T>where
<T as TryFrom<u64>>::Error: Send + Sync + 'static + Error + ToString,
impl<T: TryFrom<u64> + Clone + Send + Sync + 'static> TypedValueParser for RangedU64ValueParser<T>where
<T as TryFrom<u64>>::Error: Send + Sync + 'static + Error + ToString,
source§fn parse_ref(
&self,
cmd: &Command<'_>,
arg: Option<&Arg<'_>>,
raw_value: &OsStr
) -> Result<Self::Value, Error>
fn parse_ref(
&self,
cmd: &Command<'_>,
arg: Option<&Arg<'_>>,
raw_value: &OsStr
) -> Result<Self::Value, Error>
Parse the argument value Read more
source§fn parse(
&self,
cmd: &Command<'_>,
arg: Option<&Arg<'_>>,
value: OsString
) -> Result<Self::Value, Error>
fn parse(
&self,
cmd: &Command<'_>,
arg: Option<&Arg<'_>>,
value: OsString
) -> Result<Self::Value, Error>
Parse the argument value Read more
source§fn possible_values(
&self
) -> Option<Box<dyn Iterator<Item = PossibleValue<'static>> + '_>>
fn possible_values(
&self
) -> Option<Box<dyn Iterator<Item = PossibleValue<'static>> + '_>>
Reflect on enumerated value properties Read more