Enum Tag 

pub enum Tag {
    End,
    Byte(i8),
    Short(i16),
    Int(i32),
    Long(i64),
    Float(u32),
    Double(u64),
    ByteArray(Vec<u8>),
    String(JavaString),
    List(Vec<Tag>),
    Compound(BTreeMap<JavaString, Tag>),
    IntArray(Vec<i32>),
    LongArray(Vec<i64>),
}

Float and double variants hold their IEEE bit patterns. Java’s disk output canonicalizes NaNs (DataOutputStream.writeFloat); its network output keeps their bits (Netty’s ByteBuf.writeFloat). Loading, like vanilla’s valueOf factories, normalizes negative zero to positive zero.

Variants

End

Byte(i8)

Short(i16)

Int(i32)

Long(i64)

Float(u32)

Double(u64)

ByteArray(Vec<u8>)

String(JavaString)

List(Vec<Tag>)

Compound(BTreeMap<JavaString, Tag>)

IntArray(Vec<i32>)

LongArray(Vec<i64>)

Implementations

impl Tag

pub fn id(&self) -> u8

pub fn get(&self, key: &str) -> Option<&Tag>

pub fn get_mut(&mut self, key: &str) -> Option<&mut Tag>

pub fn compound( entries: impl IntoIterator<Item = (impl Into<JavaString>, Tag)>, ) -> Tag

impl Tag

pub fn to_network_bytes(&self) -> Result<Vec<u8>, Error>

Encode a nameless network root. End (also vanilla’s null marker) is [0]. Uses the engine’s network writer, preserving NaN bits; refuses depth over 512 and strings whose modified UTF-8 exceeds 65535 bytes. Vanilla applies heap quotas when reading, not writing.

pub fn from_network_bytes( bytes: &[u8], quota: Option<u64>, ) -> Result<(Tag, usize), Error>

Decode one nameless network root and return its consumed byte count. Trailing bytes remain unread. None uses vanilla’s 2 MiB heap quota; Some(quota) supplies a caller quota in NbtAccounter bytes, not encoded bytes. Container nesting is limited to 512. End represents vanilla null. Malformed input, quota exhaustion and excessive depth return an Error.

Trait Implementations

impl Clone for Tag

fn clone(&self) -> Tag

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Tag

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

Formats the value using the given formatter.

impl Eq for Tag

impl From<&BTreeMap<JavaString, Tag>> for Tag

fn from(compound: &BTreeMap<JavaString, Tag>) -> Tag

Converts to this type from the input type.

impl Hash for Tag

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

where __H: Hasher,

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 Tag

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Tag

impl TryFrom<&Tag> for Vec<u8>

A tag as its network NBT bytes (write_network), the form it crosses to a wasm mod in; a tag past the default limits is refused, with the reason.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(tag: &Tag) -> Result<Vec<u8>, Error>

Performs the conversion.

impl TryFrom<Tag> for BTreeMap<JavaString, Tag>

The compound a compound tag holds; any other tag is refused as itself.

type Error = Tag

The type returned in the event of a conversion error.

fn try_from(tag: Tag) -> Result<BTreeMap<JavaString, Tag>, Tag>

Performs the conversion.

impl TryFrom<Vec<u8>> for Tag

A tag read from its network NBT bytes (read_network).

type Error = Error

The type returned in the event of a conversion error.

fn try_from(bytes: Vec<u8>) -> Result<Tag, Error>

Performs the conversion.

impl Wire for Tag

const MIN: usize = 4

Minimum encoded size, used to reject impossible collection lengths.

fn put(&self, out: &mut Writer)

Encodes this value, recording failures on the writer.

fn put_owned(self, out: &mut Writer)

Consumes owned data when a resource’s ownership must cross the boundary.

fn take(input: &mut Reader<'_>) -> Result<Tag, WireError>

Decodes one value, leaving any following bytes for the caller.