vcard-rs 0.2.0

vCard parser, validator, editor and builder library for Rust
Documentation 
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//! # REV lens
//!
//! The `REV` (revision) property lens: the timestamp of the card's latest
//! revision, decoded as a `VcardTimestamp` (RFC 6350 6.7.4).

use crate::{
    param::VcardParamKind,
    prop::VcardPropKind,
    tree::{
        line::VcardLine,
        prop::{cardinality::VcardPropCardinality, lens::VcardPropLens, spec::VcardPropSpec},
        value::cursor::VcardValueCursor,
    },
    value::{VcardValueKind, datetime::VcardTimestamp},
    version::VcardVersion,
};

/// The `REV` property lens.
pub struct REV;

impl VcardPropLens for REV {
    type Target<'v> = VcardTimestamp<'v>;

    type Cursor<'c, 'a>
        = VcardValueCursor<'c, 'a>
    where
        'a: 'c;

    fn cursor<'c, 'a>(line: &'c mut VcardLine<'a>) -> VcardValueCursor<'c, 'a> {
        VcardValueCursor { line }
    }
}

impl VcardPropSpec for REV {
    const KIND: VcardPropKind = VcardPropKind::Rev;

    fn cardinality(_version: VcardVersion) -> VcardPropCardinality {
        VcardPropCardinality::AtMostOne
    }

    fn allowed_values(_version: VcardVersion) -> &'static [VcardValueKind] {
        &[VcardValueKind::Timestamp]
    }

    fn allowed_params(_version: VcardVersion) -> &'static [VcardParamKind] {
        &[VcardParamKind::Value]
    }
}