Enum NationalOption 

#[non_exhaustive]
pub enum NationalOption {
    English,
    German,
    SwedishFinnishHungarian,
    Italian,
    French,
    PortugueseSpanish,
    CzechSlovak,
    Reserved(u8),
}

Available on crate feature teletext only.

The C12/C13/C14 “National Option Character Subset” selector (ETSI EN 300 706 Table 2, page header control bits) — decoded per Table 32’s first group (0000XXX, “Latin 0”), which clause 15.1 states is the interpretation at presentation Level 1 (“the national option sub-set in use on the page is defined by the C12, C13 and C14 control bits in the page header alone”).

Only NationalOption::English’s character substitutions are applied by latin_g0_char; the other variants are decoded and labelled (spec fidelity — every value of this 3-bit field has a name) but fall back to the base Latin G0 glyph at the 13 nationally-substitutable positions, a documented gap (see the module docs and docs/teletext-subtitles.md).

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

English

000 — English. The only option whose Table 36 substitutions are implemented (see latin_g0_char).

German

001 — German.

SwedishFinnishHungarian

010 — Swedish/Finnish/Hungarian.

Italian

011 — Italian.

French

100 — French.

PortugueseSpanish

101 — Portuguese/Spanish.

CzechSlovak

110 — Czech/Slovak.

Reserved(u8)

111 — reserved (Table 32’s first group defines no option here); the raw 3-bit value is retained.

Implementations

impl NationalOption

pub fn from_bits(v: u8) -> Self

Decode from the packed 3-bit value (c12 << 2) | (c13 << 1) | c14.

pub fn name(&self) -> &'static str

Spec token (issue #204 label convention).

Trait Implementations

impl Clone for NationalOption

fn clone(&self) -> NationalOption

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for NationalOption

impl Debug for NationalOption

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for NationalOption

Available on crate feature serde only.

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for NationalOption

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for NationalOption

impl PartialEq for NationalOption

fn eq(&self, other: &NationalOption) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for NationalOption

Available on crate feature serde only.

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for NationalOption