Enum Error

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#[non_exhaustive]
pub enum Error {
Show 22 variants ControlCharacterInString, EofWhileParsingList, EofWhileParsingObject, EofWhileParsingString, EofWhileParsingValue, ExpectedColon, ExpectedHighSurrogate, ExpectedListCommaOrEnd, ExpectedLowSurrogate, ExpectedObjectCommaOrEnd, ExpectedSomeIdent, ExpectedSomeValue, InvalidEscape, InvalidNumber, InvalidType, InvalidUnicodeCodePoint, KeyMustBeAString, LoneSurrogateFound, TrailingCharacters, TrailingComma, RecursionLimitExceeded, Custom(String),
}
Expand description

This type represents all possible errors that can occur when deserializing JSON data

It implements [std::error::Error] trait so long as either std or unstable features are enabled. std is enabled by default and disabling it makes the crate no_std. unstable makes it necessary to build code with nightly compiler.

Variants (Non-exhaustive)§

This enum is marked as non-exhaustive
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
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ControlCharacterInString

Control character (U+0000 to U+001F) found in string. Those must always be escaped.

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EofWhileParsingList

EOF while parsing a list.

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EofWhileParsingObject

EOF while parsing an object.

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EofWhileParsingString

EOF while parsing a string.

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EofWhileParsingValue

EOF while parsing a JSON value.

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ExpectedColon

Expected this character to be a ':'.

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ExpectedHighSurrogate

Expected a high surrogate (D800–DBFF) but found something else

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ExpectedListCommaOrEnd

Expected this character to be either a ',' or a ']'.

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ExpectedLowSurrogate

Expected a low surrogate (DC00–DFFF) but found something else

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ExpectedObjectCommaOrEnd

Expected this character to be either a ',' or a '}'.

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ExpectedSomeIdent

Expected to parse either a true, false, or a null.

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ExpectedSomeValue

Expected this character to start a JSON value.

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InvalidEscape

Invalid escape sequence

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InvalidNumber

Invalid number.

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InvalidType

Invalid type

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InvalidUnicodeCodePoint

Invalid unicode code point.

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KeyMustBeAString

Object key is not a string.

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LoneSurrogateFound

Found a lone surrogate, which can exist in JSON but cannot be encoded to UTF-8

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TrailingCharacters

JSON has non-whitespace trailing characters after the value.

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TrailingComma

JSON has a comma after the last value in an array or map.

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RecursionLimitExceeded

JSON is nested too deeply, exceeded the recursion limit.

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Custom(String)

Custom error message from serde

Trait Implementations§

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impl Debug for Error

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

Formats the value using the given formatter. Read more
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impl Display for Error

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

Formats the value using the given formatter. Read more
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impl Error for Error

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

Returns the lower-level source of this error, if any. Read more
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fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()
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fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
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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. Read more
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impl Error for Error

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

Raised when there is general error when deserializing a type. Read more
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fn invalid_type(unexp: Unexpected<'_>, exp: &dyn Expected) -> Self

Raised when a Deserialize receives a type different from what it was expecting. Read more
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fn invalid_value(unexp: Unexpected<'_>, exp: &dyn Expected) -> Self

Raised when a Deserialize receives a value of the right type but that is wrong for some other reason. Read more
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fn invalid_length(len: usize, exp: &dyn Expected) -> Self

Raised when deserializing a sequence or map and the input data contains too many or too few elements. Read more
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fn unknown_variant(variant: &str, expected: &'static [&'static str]) -> Self

Raised when a Deserialize enum type received a variant with an unrecognized name.
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fn unknown_field(field: &str, expected: &'static [&'static str]) -> Self

Raised when a Deserialize struct type received a field with an unrecognized name.
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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.
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fn duplicate_field(field: &'static str) -> Self

Raised when a Deserialize struct type received more than one of the same field.
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impl PartialEq for Error

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for Error

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impl StructuralPartialEq for Error

Auto Trait Implementations§

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impl Freeze for Error

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impl RefUnwindSafe for Error

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impl Send for Error

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impl Sync for Error

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impl Unpin for Error

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impl UnwindSafe for Error

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToString for T
where T: Display + ?Sized,

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fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.