Struct DateTimeFunction 

pub struct DateTimeFunction<B = DefaultBackend> { /* private fields */ }

A date/time handler over the backend B: :datetime, :date, :time, or the unannotated one — the statics crate::DATETIME, crate::DATE, crate::TIME, crate::DATES over the default backend, or one built with the constructors over another.

Implementations

impl<B> DateTimeFunction<B>

pub const fn datetime(backend: B) -> Self

:datetime.

pub const fn date(backend: B) -> Self

:date.

pub const fn time(backend: B) -> Self

:time.

pub const fn unannotated(backend: B) -> Self

The handler of unannotated date/time values, for Registry::with_dates: a value is formatted as :datetime with no options would format it — its own override options apply — and if that resolution reports an error, it is a fallback value with that error. Named in a registry, it is :datetime.

pub const fn backend(&self) -> &B

The backend.

Trait Implementations

impl<B: Clone> Clone for DateTimeFunction<B>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<B: Copy> Copy for DateTimeFunction<B>

impl<B: Debug> Debug for DateTimeFunction<B>

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

Formats the value using the given formatter.

impl<B: Backend> Function for DateTimeFunction<B>

fn resolve<'a>( &self, cx: &FnContext<'_>, operand: Option<&Value<'a>>, options: &Options<'_, 'a>, errs: &mut dyn ErrorSink, ) -> Option<Value<'a>>

Function resolution (formatting.md): operand resolved — a Value::Fallback when it failed to resolve, so the handler decides (plans/03-runtime.md §2.6) — and options resolved with u:id/u:dir removed. None makes the expression a fallback value; the handler has reported why.

fn formattable( &self, cx: &FnContext<'_>, value: &Value<'_>, ) -> Result<(), FormatError>

Whether value can be formatted. Err(e): the placeholder is a fallback value and e is reported.

fn format(&self, cx: &FnContext<'_>, value: &Value<'_>, out: &mut dyn Sink)

Writes value’s formatted text.

fn format_parts( &self, cx: &FnContext<'_>, value: &Value<'_>, out: &mut dyn SubPartSink, )

Writes value’s formatted sub-parts (none by default).

fn part_kind(&self) -> &'static str

The type of this handler’s expression parts.

fn dir(&self, cx: &FnContext<'_>, value: &Value<'_>) -> Dir

The direction of value’s formatted text (Default Bidi Strategy); Auto = unknown.

fn selectable(&self, value: &Value<'_>) -> bool

Whether value supports selection (formatting.md, “Resolve Selectors”). A value that does not matches only *, with Bad Selector.

fn matches( &self, cx: &FnContext<'_>, value: &Value<'_>, key: &str, errs: &mut dyn ErrorSink, ) -> bool

Match(value, key); key is NFC. Report e.g. Bad Variant Key through errs.

fn better_than( &self, cx: &FnContext<'_>, value: &Value<'_>, key1: &str, key2: &str, ) -> bool

BetterThan(value, key1, key2), for two keys that both match.