Struct Repr 

pub struct Repr { /* private fields */ }

A data element’s representation — an..35, n8, a1 and friends.

This is the column every UN/EDIFACT directory prints beside a data element, and the thing partners actually reject on: a sender identification of 40 characters where the standard says an..35 is refused at the far end, long after it was sent.

Length is counted in characters

ISO 9735-1 §6: “one graphic character shall be counted as one character, irrespective of the number of bytes/octets required to encode it” — so ü is one, not two. §5 excludes the release character from the count, which is automatic here because release sequences are already resolved by the time a value reaches validation.

For a numeric value §10 excludes more: “the length … shall not include the minus sign (-), the decimal mark (. or ,), or the exponent mark (E or e) and its exponent”. -123.45 is therefore five characters long, not seven.

Implementations

impl Repr

pub const fn an(max: u16) -> Self

an{max} — exactly max alphanumeric characters.

pub const fn an_up_to(max: u16) -> Self

an..{max} — up to max alphanumeric characters.

pub const fn a(max: u16) -> Self

a{max} — exactly max alphabetic characters.

pub const fn a_up_to(max: u16) -> Self

a..{max} — up to max alphabetic characters.

pub const fn n(max: u16) -> Self

n{max} — exactly max numeric characters.

pub const fn n_up_to(max: u16) -> Self

n..{max} — up to max numeric characters.

pub const fn kind(self) -> ReprKind

The character class.

pub const fn max_length(self) -> u16

The maximum number of characters.

pub const fn min_length(self) -> u16

The minimum number of characters — max_length when fixed, else 1.

A data element is “present” only when it carries at least one character (§8.1), so a variable-length minimum is never zero.

pub const fn is_fixed(self) -> bool

Whether the length is fixed (an3) rather than variable (an..3).

pub fn measure(self, value: &str) -> usize

The number of characters value contributes toward its length limit.

For a numeric value this is §10’s count, which excludes the sign, the decimal mark, and the exponent.

pub fn permits_characters(self, value: &str) -> bool

Whether every character of value belongs to this representation’s class.

Trait Implementations

impl Clone for Repr

fn clone(&self) -> Repr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Repr

impl Debug for Repr

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

Formats the value using the given formatter.

impl Display for Repr

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

Formats the value using the given formatter.

impl Eq for Repr

impl Hash for Repr

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

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 Repr

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Repr