Enum BorrowedFormatItem

#[non_exhaustive]
pub enum BorrowedFormatItem<'a> {
    Literal(&'a [u8]),
    Component(Component),
    Compound(&'a [Self]),
    Optional(&'a Self),
    First(&'a [Self]),
}

Available on crate features formatting or parsing only.

A complete description of how to format and parse a type.

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.

Literal(&'a [u8])

Bytes that are formatted as-is.

Note: These bytes should be UTF-8, but are not required to be. The value is passed through String::from_utf8_lossy when necessary.

Component(Component)

A minimal representation of a single non-literal item.

Compound(&'a [Self])

A series of literals or components that collectively form a partial or complete description.

Optional(&'a Self)

A FormatItem that may or may not be present when parsing. If parsing fails, there will be no effect on the resulting struct.

This variant has no effect on formatting, as the value is guaranteed to be present.

First(&'a [Self])

A series of FormatItems where, when parsing, the first successful parse is used. When formatting, the first element of the slice is used. An empty slice is a no-op when formatting or parsing.

Trait Implementations

impl AnyFormatItem for BorrowedFormatItem<'_>

Available on crate feature parsing only.

fn parse_item<'a>( &self, parsed: &mut Parsed, input: &'a [u8], ) -> Result<&'a [u8], ParseFromDescription>

Parse a single item, returning the remaining input on success.

impl<'a> Clone for BorrowedFormatItem<'a>

fn clone(&self) -> BorrowedFormatItem<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BorrowedFormatItem<'_>

Available on crate feature alloc only.

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

Formats the value using the given formatter.

impl<'a> Eq for BorrowedFormatItem<'a>

#[doc(hidden)] fn assert_receiver_is_total_eq(&self)

impl<'a> From<&'a [BorrowedFormatItem<'_>]> for BorrowedFormatItem<'a>

fn from(items: &'a [BorrowedFormatItem<'_>]) -> Self

Converts to this type from the input type.

impl From<&BorrowedFormatItem<'_>> for OwnedFormatItem

Available on crate feature alloc only.

fn from(item: &BorrowedFormatItem<'_>) -> Self

Converts to this type from the input type.

impl From<BorrowedFormatItem<'_>> for OwnedFormatItem

Available on crate feature alloc only.

fn from(item: BorrowedFormatItem<'_>) -> Self

Converts to this type from the input type.

impl From<Component> for BorrowedFormatItem<'_>

fn from(component: Component) -> Self

Converts to this type from the input type.

impl PartialEq<&[BorrowedFormatItem<'_>]> for BorrowedFormatItem<'_>

fn eq(&self, rhs: &&[Self]) -> 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 PartialEq<BorrowedFormatItem<'_>> for &[BorrowedFormatItem<'_>]

fn eq(&self, rhs: &BorrowedFormatItem<'_>) -> 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 PartialEq<BorrowedFormatItem<'_>> for Component

fn eq(&self, rhs: &BorrowedFormatItem<'_>) -> 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 PartialEq<Component> for BorrowedFormatItem<'_>

fn eq(&self, rhs: &Component) -> 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<'a> PartialEq for BorrowedFormatItem<'a>

fn eq(&self, other: &BorrowedFormatItem<'a>) -> 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 Sealed for BorrowedFormatItem<'_>

Available on crate feature formatting only.

fn format_into( &self, output: &mut impl Write, date: Option<Date>, time: Option<Time>, offset: Option<UtcOffset>, ) -> Result<usize, Format>

Format the item into the provided output, returning the number of bytes written.

fn format( &self, date: Option<Date>, time: Option<Time>, offset: Option<UtcOffset>, ) -> Result<String, Format>

Format the item directly to a String.

impl Sealed for BorrowedFormatItem<'_>

Available on crate feature parsing only.

fn parse_into<'a>( &self, input: &'a [u8], parsed: &mut Parsed, ) -> Result<&'a [u8], Parse>

Parse the item into the provided Parsed struct.

fn parse(&self, input: &[u8]) -> Result<Parsed, Parse>

Parse the item into a new Parsed struct.

fn parse_date(&self, input: &[u8]) -> Result<Date, Parse>

Parse a Date from the format description.

fn parse_time(&self, input: &[u8]) -> Result<Time, Parse>

Parse a Time from the format description.

fn parse_offset(&self, input: &[u8]) -> Result<UtcOffset, Parse>

Parse a UtcOffset from the format description.

fn parse_primitive_date_time( &self, input: &[u8], ) -> Result<PrimitiveDateTime, Parse>

Parse a PrimitiveDateTime from the format description.

fn parse_utc_date_time(&self, input: &[u8]) -> Result<UtcDateTime, Parse>

Parse a UtcDateTime from the format description.

fn parse_offset_date_time(&self, input: &[u8]) -> Result<OffsetDateTime, Parse>

Parse a OffsetDateTime from the format description.

impl TryFrom<BorrowedFormatItem<'_>> for Component

type Error = DifferentVariant

The type returned in the event of a conversion error.

fn try_from(value: BorrowedFormatItem<'_>) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a> TryFrom<BorrowedFormatItem<'a>> for &[BorrowedFormatItem<'a>]

type Error = DifferentVariant

The type returned in the event of a conversion error.

fn try_from(value: BorrowedFormatItem<'a>) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a> TryFrom<Item<'a>> for BorrowedFormatItem<'a>

Available on crate feature alloc only.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(item: Item<'a>) -> Result<Self, Self::Error>

Performs the conversion.

impl Formattable for BorrowedFormatItem<'_>

Available on crate feature formatting only.

impl Parsable for BorrowedFormatItem<'_>

Available on crate feature parsing only.

impl<'a> StructuralPartialEq for BorrowedFormatItem<'a>