Enum Error 

pub enum Error {
    EndOfTokens,
    ExpectedSeqEnd,
    ExpectedTupleEnd,
    ExpectedTupleStructEnd,
    ExpectedTupleVariantEnd,
    ExpectedMapEnd,
    ExpectedStructEnd,
    ExpectedStructVariantEnd,
    UnsupportedEnumDeserializerMethod,
    NotSelfDescribing,
    Custom(String),
    InvalidType(String, String),
    InvalidValue(String, String),
    InvalidLength(usize, String),
    UnknownVariant(String, &'static [&'static str]),
    UnknownField(String, &'static [&'static str]),
    MissingField(&'static str),
    DuplicateField(&'static str),
}

An error encountered during deserialization.

Example

use serde::de::Error as _;
use serde_assert::de::Error;

assert_eq!(
    format!("{}", Error::missing_field("foo")),
    "missing field foo"
);

Variants

EndOfTokens

The Deserializer reached the end of the input Tokens before deserialization was completed.

ExpectedSeqEnd

Expected a Token::SeqEnd.

ExpectedTupleEnd

Expected a Token::TupleEnd.

ExpectedTupleStructEnd

Expected a Token::TupleStructEnd.

ExpectedTupleVariantEnd

Expected a Token::TupleVariantEnd.

ExpectedMapEnd

Expected a Token::MapEnd.

ExpectedStructEnd

Expected a Token::StructEnd.

ExpectedStructVariantEnd

Expected a Token::StructVariantEnd.

UnsupportedEnumDeserializerMethod

An unsupported serde::Deserializer method was called during deserialization of an enum variant.

If you encounter this error, check what methods you are calling when deserializing your enum variants. Many standard serde types are not supported in this context.

NotSelfDescribing

The Deserializer was set to be non-self-describing, but the Deserialize implementation made a call to deserialize_any().

Custom(String)

An error created by calling custom().

InvalidType(String, String)

An error created by calling invalid_type().

InvalidValue(String, String)

An error created by calling invalid_value().

InvalidLength(usize, String)

An error created by calling invalid_length().

UnknownVariant(String, &'static [&'static str])

An error created by calling unknown_variant().

UnknownField(String, &'static [&'static str])

An error created by calling unknown_field().

MissingField(&'static str)

An error created by calling missing_field().

DuplicateField(&'static str)

An error created by calling duplicate_field().

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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 Error for Error

fn custom<T>(msg: T) -> Self

where T: Display,

Raised when there is general error when deserializing a type.

fn invalid_type(unexpected: Unexpected<'_>, expected: &dyn Expected) -> Self

Raised when a Deserialize receives a type different from what it was expecting.

fn invalid_value(unexpected: Unexpected<'_>, expected: &dyn Expected) -> Self

Raised when a Deserialize receives a value of the right type but that is wrong for some other reason.

fn invalid_length(len: usize, expected: &dyn Expected) -> Self

Raised when deserializing a sequence or map and the input data contains too many or too few elements.

fn unknown_variant(variant: &str, expected: &'static [&'static str]) -> Self

Raised when a Deserialize enum type received a variant with an unrecognized name.

fn unknown_field(field: &str, expected: &'static [&'static str]) -> Self

Raised when a Deserialize struct type received a field with an unrecognized name.

fn missing_field(field: &'static str) -> Self

Raised when a Deserialize struct type expected to receive a required field with a particular name but that field was not present in the input.

fn duplicate_field(field: &'static str) -> Self

Raised when a Deserialize struct type received more than one of the same field.

impl PartialEq for Error

fn eq(&self, other: &Error) -> 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 Error