Enum DecodeError 

pub enum DecodeError {
    Truncated,
    UnsupportedMajorType(u8),
    UnsupportedAdditionalInfo(u8),
    UnsupportedAdditionalInfoEncoding(u8),
    TrailingBytes,
    InvalidUtf8,
    UnrepresentableFloat,
    NestingTooDeep,
}

Variants

Truncated

The buffer ended before a complete value could be read.

UnsupportedMajorType(u8)

Major type 6 (tags) — not part of macula’s wire format.

UnsupportedAdditionalInfo(u8)

A major-7 additional-info value with no meaning here (only 22 [null] and 25/26/27 [floats] are supported).

UnsupportedAdditionalInfoEncoding(u8)

Additional-info 28-31 on any major type — reserved, unused.

TrailingBytes

A single top-level value didn’t consume the whole buffer.

InvalidUtf8

A major-3 (text) value’s bytes were not valid UTF-8. The reference Erlang/Rust codec does not validate this on decode (it stores whatever bytes arrived); this port deliberately diverges and treats it as an error instead of losslessly carrying invalid UTF-8, since every real macula text value is ASCII/UTF-8 by construction and failing closed on malformed input from a peer is the safer default. Documented, not accidental.

UnrepresentableFloat

A half-float (binary16) with exponent 31 — NaN or infinity, which has no representation as an ordinary f64 value here (matches the reference decoder’s own behavior: no clause for it).

NestingTooDeep

Lists/maps nested more than MAX_NESTING_DEPTH levels deep. Not part of the wire format’s own semantics — a defense against a maliciously crafted frame: a list-of-one-list-of-one-list… can encode extreme nesting in very few bytes (one byte per level), and this decoder is plain recursive descent, so without a limit a peer could crash the process with a stack overflow (not a catchable panic) from a single frame well under frame::MAX_FRAME_BYTES. No real macula wire value nests anywhere close to this deep.

Trait Implementations

impl Clone for DecodeError

fn clone(&self) -> DecodeError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DecodeError

impl Debug for DecodeError

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

Formats the value using the given formatter.

impl Display for DecodeError

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

Formats the value using the given formatter.

impl Eq for DecodeError

impl Error for DecodeError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for DecodeError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DecodeError