Struct serde_lexpr::error::Error

pub struct Error(_);

This type represents all possible errors that can occur when serializing or deserializing S-expression data.

Methods

impl Error

pub fn location(&self) -> Option<Location>

Location of the error in the input stream.

pub fn classify(&self) -> Category

Categorizes the cause of this error.

• Category::Io - failure to read or write bytes on an IO stream
• Category::Syntax - input that is not a syntactically valid S-expression
• Category::Data - input data that is semantically incorrect
• Category::Eof - unexpected end of the input data

Trait Implementations

impl Debug for Error

fn fmt(&self, formatter: &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)>

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred.

fn description(&self) -> &str

Deprecated since 1.42.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

fn cause(&self) -> Option<&dyn Error>

Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl Error for Error

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

Used when a [Serialize] implementation encounters any error while serializing a type.

impl Error for Error

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

Raised when there is general error when deserializing a type.

fn invalid_type(unexp: Unexpected, exp: &dyn Expected) -> Self

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

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.

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.

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 From<Error> for Error

fn from(l: Error) -> Self

Convert a serde_lexpr::Error into an io::Error.

S-expression syntax errors are turned into InvalidData IO errors. EOF errors are turned into UnexpectedEof IO errors.

use std::io;

enum MyError {
    Io(io::Error),
    Lexpr(serde_lexpr::Error),
}

impl From<serde_lexpr::Error> for MyError {
    fn from(err: serde_lexpr::Error) -> MyError {
        use serde_lexpr::error::Category;
        match err.classify() {
            Category::Io => {
                MyError::Io(err.into())
            }
            Category::Syntax | Category::Eof | Category::Data => {
                MyError::Lexpr(err)
            }
        }
    }
}

impl From<Error> for Error

fn from(e: Error) -> Self

Performs the conversion.

impl From<Error> for Error

fn from(e: Error) -> Self

Performs the conversion.