vcard-rs 0.2.1

vCard parser, validator, editor and builder library for Rust
Documentation 
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//! # LANGUAGE lens
//!
//! The `LANGUAGE` property lens: the default language of the card's
//! free-text values, decoded as an RFC 5646 language tag.
//!
//! See RFC 9554.

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

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

impl VcardPropLens for LANGUAGE {
    type Target<'v> = VcardLanguageTag<'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 LANGUAGE {
    const KIND: VcardPropKind = VcardPropKind::Language;

    fn allowed_versions() -> &'static [VcardVersion] {
        &[VcardVersion::V4_0]
    }

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

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

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