ical-rs 0.2.0

iCalendar parser, validator, editor and builder library for Rust
Documentation 
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//! # Property cardinality
//!
//! How many times a property may appear in its component, per RFC 5545 section
//! 3.6.

/// The RFC 5545 property multiplicity: how many times a property may appear in
/// its component. Prop multiplicity, not value structure, so it is not
/// derivable from the value kind (`FN` and `NOTE` are both text but differ).
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum IcalPropCardinality {
    /// Exactly one (required, single).
    ExactlyOne,
    /// At most one (optional, single).
    AtMostOne,
    /// One or more (required, repeatable).
    OneOrMore,
    /// Any number, including zero (optional, repeatable).
    Any,
}