rrule 0.14.0

A pure Rust implementation of recurrence rules as defined in the iCalendar RFC.
Documentation 
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use crate::validator::{ValidationError, YEAR_RANGE};

pub(crate) fn check_year_range(year: i32) -> Result<(), ValidationError> {
    if YEAR_RANGE.contains(&year) {
        Ok(())
    } else {
        Err(ValidationError::InvalidFieldValueRange {
            field: "YEAR".into(),
            value: year.to_string(),
            start_idx: YEAR_RANGE.start().to_string(),
            end_idx: YEAR_RANGE.end().to_string(),
        })
    }
}