Enum precis_core::DerivedPropertyValue

pub enum DerivedPropertyValue {
    PValid,
    SpecClassPval,
    SpecClassDis,
    ContextJ,
    ContextO,
    Disallowed,
    Unassigned,
}

Derived property value

Notes

• SpecClassPVal maps to those code points that are allowed to be used in specific string classes such as IdentifierClass and FreeformClass. PRECIS framework defines two allowed values for above classes (ID_PVAL adn FREE_PVAL). In practice, the derived property ID_PVAL is not used in this specification, because every ID_PVAL code point is PVALID, so only FREE_PVAL is actually mapped to SpecClassPVal.
• SpecClassDis maps to those code points that are not to be included in one of the string classes but that might be permitted in others. PRECIS framework defines “FREE_DIS” for the FreeformClass and “ID_DIS” for the IdentifierClass. In practice, the derived property FREE_DIS is not used in this specification, because every FREE_DIS code point is DISALLOWED, so only ID_DIS is mapped to SpecClassDis. Both SpecClassPVal and SpecClassDis values are used to ease extension if more classes are added beyond IdentifierClass and FreeformClass in the future.

Variants

PValid

Value assigned to all those code points that are allowed to be used in any PRECIS string class.

SpecClassPval

Value assigned to all those code points that are allowed to be used in an specific PRECIS string class.

SpecClassDis

Value assigned to all those code points that are disallowed by a specific PRECIS string class.

ContextJ

Contextual rule required for Join_controls Unicode codepoints.

ContextO

Contextual rule required for Others Unicode codepoints.

Disallowed

Those code points that are not permitted in any PRECIS string class.

Unassigned

Those code points that are not designated in the Unicode Standard.

Trait Implementations

impl Clone for DerivedPropertyValue

fn clone(&self) -> DerivedPropertyValue

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DerivedPropertyValue

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

Formats the value using the given formatter.

impl Display for DerivedPropertyValue

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

Formats the value using the given formatter.

impl PartialEq for DerivedPropertyValue

fn eq(&self, other: &DerivedPropertyValue) -> 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 DerivedPropertyValue

impl Eq for DerivedPropertyValue

impl StructuralPartialEq for DerivedPropertyValue