Struct Trigraph 

pub struct Trigraph(/* private fields */);

A 3-character country trigraph (e.g., USA, GBR, AUS). Validated against CVE country code list at rule-check time.

The inner bytes are private; construction goes through Trigraph::try_new which enforces ASCII-uppercase invariants so that Trigraph::as_str can return a &str infallibly without panicking at runtime.

Limitations

CAPCO also uses tetragraphs (NATO, FVEY, ACGU) and longer org codes (AUSTRALIA_GROUP). These are present in the CVE TRIGRAPHS list but cannot be represented by this type’s 3-byte constraint. A broader CountryCode type is planned for a future version.

Implementations

impl Trigraph

pub const USA: Trigraph

The always-valid USA trigraph constant.

pub const fn try_new(bytes: [u8; 3]) -> Option<Trigraph>

Attempt to construct a trigraph from 3 bytes.

Returns None unless every byte is an ASCII uppercase letter (A–Z), which is the invariant enforced by CAPCO for all valid country/entity codes.

pub fn as_str(&self) -> &str

Return the trigraph as a string slice.

Infallible because construction via Trigraph::try_new (or the Trigraph::USA constant) guarantees ASCII-uppercase bytes, which are always valid UTF-8.

Trait Implementations

impl Clone for Trigraph

fn clone(&self) -> Trigraph

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Trigraph

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

Formats the value using the given formatter.

impl Display for Trigraph

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

Formats the value using the given formatter.

impl Hash for Trigraph

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Trigraph

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Trigraph

impl Eq for Trigraph

impl StructuralPartialEq for Trigraph