Struct Len 

pub struct Len<const MIN: usize, const MAX: usize = { usize::MAX }>;

Requires the length of a string or collection to be in a range.

Both ends are inclusive. Strings count characters, collections items (see Length). The code of the violation is the name of the validator: len, min_len (MinLen) or max_len (MaxLen). It has the parameters min and max (if they are set).

use deser_validate::{Len, MaxLen, Validator};

assert!(Len::<1, 3>::validate("abc").is_ok());
assert_eq!(
    Len::<1, 3>::validate("abcd").unwrap_err().message(),
    "length must be between 1 and 3"
);
assert!(MaxLen::<2>::validate(&vec![1, 2, 3]).is_err());

Trait Implementations

impl<T: Length + ?Sized, const MIN: usize, const MAX: usize> Validator<T> for Len<MIN, MAX>

fn validate(value: &T) -> Result<(), Violation>

Validates the value.