Struct Tag

pub struct Tag(pub u64);

A semantic tag for a CBOR data item.

See RFC 7049 § 2.4: Table 3 and the CBOR Tags IANA Registry

Tuple Fields

0: u64

Implementations

impl Tag

pub const DATETIME: Tag

A “Standard date/time string”; must only be applied to a text string (or the indefinite variant of) data item.

See RFC 7049 § 2.4.1 for more details on how to interpret the string.

Defined in RFC 7049 § 2.4: Table 3.

pub const EPOCH_DATETIME: Tag

An “Epoch-based date/time”; must only be applied to an unsigned integer, negative integer or floating point data item.

See RFC 7049 § 2.4.1 for more details on how to interpret the value.

Defined in RFC 7049 § 2.4: Table 3.

pub const POSITIVE_BIGNUM: Tag

A “positive bignum”; must only be applied to a byte string (or the indefinite variant of) data item.

See RFC 7049 § 2.4.2 for more details on how to interpret the bytes.

Defined in RFC 7049 § 2.4: Table 3.

pub const NEGATIVE_BIGNUM: Tag

A “negative bignum”; must only be applied to a byte string (or the indefinite variant of) data item.

See RFC 7049 § 2.4.2 for more details on how to interpret the bytes.

Defined in RFC 7049 § 2.4: Table 3.

pub const DECIMAL_FRACTION: Tag

A “decimal fraction”; must only be applied to an array containing exactly two data items, the first must be either a unsigned integer or negative integer, the second can be either of those or additionally a positive or negative bignum.

See RFC 7049 § 2.4.3 for more details on how to interpret the values.

Defined in RFC 7049 § 2.4: Table 3.

pub const BIGFLOAT: Tag

A “bigfloat”; must only be applied to an array containing exactly two data items, the first must be either a unsigned integer or negative integer, the second can be either of those or additionally a positive or negative bignum.

See RFC 7049 § 2.4.3 for more details on how to interpret the values.

Defined in RFC 7049 § 2.4: Table 3.

pub const ENCODED_BASE64URL: Tag

Sets the expected encoding of any byte strings contained in the data item to be “base64url”; can be applied to any sort of data item.

See RFC 7049 § 2.4.4.2 for more details on how the expected encoding is applied.

Defined in RFC 7049 § 2.4: Table 3.

pub const ENCODED_BASE64: Tag

Sets the expected encoding of any byte strings contained in the data item to be “base64”; can be applied to any sort of data item.

See RFC 7049 § 2.4.4.2 for more details on how the expected encoding is applied.

Defined in RFC 7049 § 2.4: Table 3.

pub const ENCODED_BASE16: Tag

Sets the expected encoding of any byte strings contained in the data item to be “base16”; can be applied to any sort of data item.

See RFC 7049 § 2.4.4.2 for more details on how the expected encoding is applied.

Defined in RFC 7049 § 2.4: Table 3.

pub const ENCODED_CBOR: Tag

Marks this item as being an encoded CBOR data item; must only be applied to a byte string (or the indefinite variant of) data item.

See RFC 7049 § 2.4.4.1 for more details on what this means.

Defined in RFC 7049 § 2.4: Table 3.

pub const SHAREABLE: Tag

Marks this item as being potentially shared and referenced by a later Tag::SHARED_REF; can be applied to any sort of data item.

See http://cbor.schmorp.de/value-sharing for more details on what this means.

pub const SHARED_REF: Tag

Marks this item as being a reference to a previous Tag::SHAREABLE item; can only be applied to an unsigned integer date item.

See http://cbor.schmorp.de/value-sharing for more details on what this means.

pub const URI: Tag

Marks this item as being a valid URI; must only be applied to a text string (or the indefinite variant of) data item.

See RFC 7049 § 2.4.4.3 for more details on what this means.

Defined in RFC 7049 § 2.4: Table 3.

pub const BASE64URL: Tag

Marks this item as being a base64url encoded string; must only be applied to a text string (or the indefinite variant of) data item.

See RFC 7049 § 2.4.4.3 for more details on what this means.

Defined in RFC 7049 § 2.4: Table 3.

pub const BASE64: Tag

Marks this item as being a base64 encoded string; must only be applied to a text string (or the indefinite variant of) data item.

See RFC 7049 § 2.4.4.3 for more details on what this means.

Defined in RFC 7049 § 2.4: Table 3.

pub const REGEX: Tag

Marks this item as being a regex; must only be applied to a text string (or the indefinite variant of) data item.

See RFC 7049 § 2.4.4.3 for more details on what this means.

Defined in RFC 7049 § 2.4: Table 3.

pub const MIME: Tag

Marks this item as being a MIME message; must only be applied to a text string (or the indefinite variant of) data item.

See RFC 7049 § 2.4.4.3 for more details on what this means.

Defined in RFC 7049 § 2.4: Table 3.

pub const UUID: Tag

Marks this item as being a binary UUID; must only be applied to a byte string (or the indefinite variant of) data item.

See the spec for more details on what this means.

Defined in non-RFC specification.

pub const ENCODED_CBOR_SEQ: Tag

Marks this item as being an encoded CBOR sequence; must only be applied to a byte string (or the indefinite variant of) data item.

See RFC 8742 for more details on what this means.

Defined in draft-bormann-cbor-notable-tags § 2.1.

pub const IPV4: Tag

Marks this item as being an IPv4 address and/or prefix; must only be applied to a four-byte byte string (or the indefinite variant of) or 2-element array data item.

Defined in RFC 9164.

pub const IPV6: Tag

Marks this item as being an IPv6 address and/or prefix; must only be applied to a sixteen-byte byte string (or the indefinite variant of) or 2/3-element array data item.

Defined in RFC 9164.

pub const TYPED_ARRAY_U8: Tag

Mark this item as being an encoding of an array of u8 values; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_U16_BIG_ENDIAN: Tag

Mark this item as being an encoding of an array of u16 values in big endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_U32_BIG_ENDIAN: Tag

Mark this item as being an encoding of an array of u32 values in big endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_U64_BIG_ENDIAN: Tag

Mark this item as being an encoding of an array of u64 values in big endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_U8_CLAMPED: Tag

Mark this item as being an encoding of an array of u8 values (with JS specific “clamping”); must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_U16_LITTLE_ENDIAN: Tag

Mark this item as being an encoding of an array of u16 values in little endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_U32_LITTLE_ENDIAN: Tag

Mark this item as being an encoding of an array of u32 values in little endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_U64_LITTLE_ENDIAN: Tag

Mark this item as being an encoding of an array of u64 values in little endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_I8: Tag

Mark this item as being an encoding of an array of i8 values in twos-complement encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_I16_BIG_ENDIAN: Tag

Mark this item as being an encoding of an array of i16 values in big endian twos-complement encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_I32_BIG_ENDIAN: Tag

Mark this item as being an encoding of an array of i32 values in big endian twos-complement encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_I64_BIG_ENDIAN: Tag

Mark this item as being an encoding of an array of i64 values in big endian twos-complement encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_I16_LITTLE_ENDIAN: Tag

Mark this item as being an encoding of an array of i16 values in little endian twos-complement encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_I32_LITTLE_ENDIAN: Tag

Mark this item as being an encoding of an array of i32 values in little endian twos-complement encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_I64_LITTLE_ENDIAN: Tag

Mark this item as being an encoding of an array of i64 values in little endian twos-complement encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_F16_BIG_ENDIAN: Tag

Mark this item as being an encoding of an array of f16 values in big endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_F32_BIG_ENDIAN: Tag

Mark this item as being an encoding of an array of f32 values in big endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_F64_BIG_ENDIAN: Tag

Mark this item as being an encoding of an array of f64 values in big endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_F128_BIG_ENDIAN: Tag

Mark this item as being an encoding of an array of f128 values in big endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_F16_LITTLE_ENDIAN: Tag

Mark this item as being an encoding of an array of f16 values in little endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_F32_LITTLE_ENDIAN: Tag

Mark this item as being an encoding of an array of f32 values in little endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_F64_LITTLE_ENDIAN: Tag

Mark this item as being an encoding of an array of f64 values in little endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const TYPED_ARRAY_F128_LITTLE_ENDIAN: Tag

Mark this item as being an encoding of an array of f128 values in little endian encoding; must only be applied to a bytes string (or the [indefinite variant][DataItem::IndefiniteByteString) of) data item.

Defined in RFC 8746.

pub const EPOCH_DATE: Tag

Number of days since the epoch date 1970-01-01; must only be applied to an unsigned integer or negative integer data item.

Defined in RFC 8943.

pub const NETWORK_ADDRESS: Tag

Marks this item as being a Network Address (IPv4 or IPv6 or MAC Address); must only be applied to a byte string (or the indefinite variant of) data item.

See the spec for more details on what this means.

Defined in non-RFC specification.

[RFC 9164][] recommends usage of Tag::IPV4 or Tag::IPV6 instead where possible.

[RFC 9164]

pub const DATE: Tag

A “Standard date string”; must only be applied to a text string (or the indefinite variant of) data item.

Defined in RFC 8943, uses format from RFC 3339.

pub const SELF_DESCRIBE_CBOR: Tag

Marks this item as being CBOR, a no-op; can be applied to any type of data item.

See RFC 7049 § 2.4.5 for more details on why this is useful.

Defined in RFC 7049 § 2.4: Table 3.

Trait Implementations

impl Clone for Tag

fn clone(&self) -> Tag

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Tag

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

Formats the value using the given formatter.

impl PartialEq for Tag

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

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

const 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 Tag

impl Eq for Tag

impl StructuralPartialEq for Tag