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use crate::ScalarError;
use std::fmt;
#[derive(Debug)]
pub struct Error(Box<ErrorKind>);
impl Error {
pub(crate) fn new(kind: ErrorKind) -> Error {
Error(Box::new(kind))
}
pub(crate) fn eof() -> Error {
Self::new(ErrorKind::Eof)
}
pub fn kind(&self) -> &ErrorKind {
&self.0
}
pub fn offset(&self) -> Option<usize> {
self.0.offset()
}
}
#[derive(Debug)]
pub enum ErrorKind {
Eof,
StackEmpty {
offset: usize,
},
InvalidEmptyObject {
offset: usize,
},
InvalidSyntax {
msg: String,
offset: usize,
},
Deserialize(DeserializeError),
}
impl ErrorKind {
pub fn offset(&self) -> Option<usize> {
match *self {
ErrorKind::StackEmpty { offset, .. } => Some(offset),
ErrorKind::InvalidEmptyObject { offset, .. } => Some(offset),
ErrorKind::InvalidSyntax { offset, .. } => Some(offset),
_ => None,
}
}
}
impl std::error::Error for Error {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
match *self.0 {
ErrorKind::Deserialize(ref err) => Some(err),
_ => None,
}
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self.0 {
ErrorKind::Eof => write!(f, "unexpected end of file"),
ErrorKind::StackEmpty { offset } => write!(f,
"stack empty, too many close tokens encountered (offset: {})", offset
),
ErrorKind::InvalidEmptyObject { offset } => write!(f,
"expected first token after an empty object started to be a close group (offset: {})", offset
),
ErrorKind::InvalidSyntax { ref msg, offset } => write!(f,
"invalid syntax encountered: {} (offset: {})", msg, offset
),
ErrorKind::Deserialize(ref err) => write!(f, "deserialize error: {}", err),
}
}
}
impl From<DeserializeError> for Error {
fn from(error: DeserializeError) -> Self {
Error::new(ErrorKind::Deserialize(error))
}
}
#[derive(Debug)]
pub struct DeserializeError {
pub(crate) kind: DeserializeErrorKind,
}
impl DeserializeError {
pub fn kind(&self) -> &DeserializeErrorKind {
&self.kind
}
}
#[derive(Debug)]
pub enum DeserializeErrorKind {
Message(String),
Unsupported(String),
Scalar(ScalarError),
UnknownToken {
token_id: u16,
},
}
impl std::error::Error for DeserializeError {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
match self.kind {
DeserializeErrorKind::Scalar(ref err) => Some(err),
_ => None,
}
}
}
impl std::fmt::Display for DeserializeError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self.kind {
DeserializeErrorKind::Message(ref msg) => write!(f, "{}", msg),
DeserializeErrorKind::Unsupported(ref msg) => {
write!(f, "unsupported deserializer method: {}", msg)
}
DeserializeErrorKind::Scalar(ref e) => e.fmt(f),
DeserializeErrorKind::UnknownToken { token_id } => {
write!(f, "unknown binary token encountered (id: {})", token_id)
}
}
}
}
#[cfg(feature = "serde")]
impl serde::de::Error for DeserializeError {
fn custom<T: fmt::Display>(msg: T) -> Self {
DeserializeError {
kind: DeserializeErrorKind::Message(msg.to_string()),
}
}
}
impl From<ScalarError> for DeserializeError {
fn from(error: ScalarError) -> Self {
DeserializeError {
kind: DeserializeErrorKind::Scalar(error),
}
}
}