Enum DecodeError 

pub enum DecodeError {
    UnexpectedEof {
        needed: usize,
        remaining: usize,
    },
    InvalidUtf8,
    InvalidDiscriminant {
        field: &'static str,
        value: u32,
    },
    NegativeLength {
        field: &'static str,
    },
    MalformedMessage {
        message: &'static str,
    },
}

Error while decoding an OPC-UA / UADP value.

Variants

UnexpectedEof

Input ended before the expected number of bytes were available.

Fields

needed: usize

How many more bytes were needed.

remaining: usize

How many remained in the buffer.

InvalidUtf8

A String or XmlElement body was not valid UTF-8.

InvalidDiscriminant

A discriminant byte did not match any defined case — carries the field name and the offending value for diagnosis.

Fields

field: &'static str

Name of the field being decoded (e.g. "NodeId encoding").

value: u32

The value that did not match.

NegativeLength

A length prefix was negative but the type does not permit a null form (only String/ByteString use -1 for null).

Fields

field: &'static str

Name of the field being decoded.

MalformedMessage

A structural invariant of a UADP message was violated (e.g. a payload header announced more DataSetMessages than the payload carried).

Fields

message: &'static str

Description of the violation.

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 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

Available on crate feature std only.

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 From<DecodeError> for DaemonError

fn from(e: DecodeError) -> Self

Converts to this type from the input type.

impl PartialEq for DecodeError

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