Struct Error 

pub struct Error { /* private fields */ }

A JSON error carrying positional information.

Every parse error records the trigger position; byte-stream inputs also carry a precise 1-based line and column.

Implementations

impl Error

pub fn custom(msg: impl Into<String>) -> Self

Build a custom error for user code.

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

A required field is missing.

pub fn unknown_field(field: String) -> Self

An unknown field was encountered.

pub fn unknown_variant(variant: String) -> Self

An unknown enum variant was encountered.

pub fn invalid_length(len: usize, expected: &'static str) -> Self

A length mismatch.

pub fn invalid_type(expected: &'static str, found: &'static str) -> Self

A type mismatch.

pub fn line(&self) -> Option<u32>

1-based line (byte-stream inputs only).

pub fn column(&self) -> Option<u32>

1-based column (byte-stream inputs only).

pub fn offset(&self) -> usize

Byte offset (byte-stream input) or token index (content replay).

pub fn is_custom(&self) -> bool

Whether this is a custom error.

pub fn classification(&self) -> &'static str

Coarse classification of the error.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

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

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 FormatError for Error

fn custom(msg: impl Into<String>) -> Self

Build a custom error message.

impl From<&str> for Error

fn from(msg: &str) -> Self

Converts to this type from the input type.

impl From<Error> for Error

Available on crate feature std only.

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<String> for Error

fn from(msg: String) -> Self

Converts to this type from the input type.