Struct serde_json::error::Error [−][src]
This type represents all possible errors that can occur when serializing or deserializing JSON data.
Implementations
impl Error
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pub fn line(&self) -> usize
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One-based line number at which the error was detected.
Characters in the first line of the input (before the first newline character) are in line 1.
pub fn column(&self) -> usize
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One-based column number at which the error was detected.
The first character in the input and any characters immediately following a newline character are in column 1.
Note that errors may occur in column 0, for example if a read from an IO stream fails immediately following a previously read newline character.
pub fn classify(&self) -> Category
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Categorizes the cause of this error.
Category::Io
- failure to read or write bytes on an IO streamCategory::Syntax
- input that is not syntactically valid JSONCategory::Data
- input data that is semantically incorrectCategory::Eof
- unexpected end of the input data
pub fn is_io(&self) -> bool
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Returns true if this error was caused by a failure to read or write bytes on an IO stream.
pub fn is_syntax(&self) -> bool
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Returns true if this error was caused by input that was not syntactically valid JSON.
pub fn is_data(&self) -> bool
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Returns true if this error was caused by input data that was semantically incorrect.
For example, JSON containing a number is semantically incorrect when the type being deserialized into holds a String.
pub fn is_eof(&self) -> bool
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Returns true if this error was caused by prematurely reaching the end of the input data.
Callers that process streaming input may be interested in retrying the deserialization once more data is available.
Trait Implementations
impl Debug for Error
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impl Display for Error
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impl Error for Error
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fn source(&self) -> Option<&(dyn Error + 'static)>
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pub fn backtrace(&self) -> Option<&Backtrace>
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pub fn description(&self) -> &str
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pub fn cause(&self) -> Option<&dyn Error>
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impl Error for Error
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impl Error for Error
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fn custom<T: Display>(msg: T) -> Error
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fn invalid_type(unexp: Unexpected<'_>, exp: &dyn Expected) -> Self
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pub fn invalid_value(unexp: Unexpected<'_>, exp: &dyn Expected) -> Self
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pub fn invalid_length(len: usize, exp: &dyn Expected) -> Self
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pub fn unknown_variant(variant: &str, expected: &'static [&'static str]) -> Self
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pub fn unknown_field(field: &str, expected: &'static [&'static str]) -> Self
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pub fn missing_field(field: &'static str) -> Self
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pub fn duplicate_field(field: &'static str) -> Self
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impl From<Error> for Error
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fn from(j: Error) -> Self
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Convert a serde_json::Error
into an io::Error
.
JSON syntax and data errors are turned into InvalidData
IO errors.
EOF errors are turned into UnexpectedEof
IO errors.
use std::io; enum MyError { Io(io::Error), Json(serde_json::Error), } impl From<serde_json::Error> for MyError { fn from(err: serde_json::Error) -> MyError { use serde_json::error::Category; match err.classify() { Category::Io => { MyError::Io(err.into()) } Category::Syntax | Category::Data | Category::Eof => { MyError::Json(err) } } } }
impl<'de> IntoDeserializer<'de, Error> for Value
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type Deserializer = Self
The type of the deserializer being converted into.
fn into_deserializer(self) -> Self::Deserializer
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Auto Trait Implementations
impl !RefUnwindSafe for Error
impl Send for Error
impl Sync for Error
impl Unpin for Error
impl !UnwindSafe for Error
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow(&self) -> &TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,