Struct serde_json::error::Error
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pub struct Error { /* fields omitted */ }
This type represents all possible errors that can occur when serializing or deserializing JSON data.
Methods
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 Error for Error
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fn description(&self) -> &str
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A short description of the error. Read more
fn cause(&self) -> Option<&Error>
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The lower-level cause of this error, if any. Read more
impl Display for Error
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fn fmt(&self, f: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl Debug for Error
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fn fmt(&self, f: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl From<Error> for Error
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impl From<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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Raised when there is general error when deserializing a type. Read more
fn invalid_type(unexp: Unexpected, exp: &Expected) -> Self
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Raised when a Deserialize
receives a type different from what it was expecting. Read more
fn invalid_value(unexp: Unexpected, exp: &Expected) -> Self
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Raised when a Deserialize
receives a value of the right type but that is wrong for some other reason. Read more
fn invalid_length(len: usize, exp: &Expected) -> Self
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Raised when deserializing a sequence or map and the input data contains too many or too few elements. Read more
fn unknown_variant(variant: &str, expected: &'static [&'static str]) -> Self
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Raised when a Deserialize
enum type received a variant with an unrecognized name. Read more
fn unknown_field(field: &str, expected: &'static [&'static str]) -> Self
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Raised when a Deserialize
struct type received a field with an unrecognized name. Read more
fn missing_field(field: &'static str) -> Self
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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. Read more
fn duplicate_field(field: &'static str) -> Self
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Raised when a Deserialize
struct type received more than one of the same field. Read more