use {
serde::de,
std::{
fmt,
io,
str::Utf8Error,
},
};
pub type Result<T> = std::result::Result<T, Error>;
#[derive(Debug, Clone, PartialEq)]
pub enum ErrorCode {
Eof,
ExpectedBoolean,
ExpectedInteger,
ExpectedI8,
ExpectedI16,
ExpectedI32,
ExpectedI64,
ExpectedU8,
ExpectedU16,
ExpectedU32,
ExpectedU64,
ExpectedF32,
ExpectedF64,
ExpectedPositiveInteger,
ExpectedString,
ExpectedNull,
ExpectedArray,
ExpectedArrayComma,
ExpectedArrayEnd,
ExpectedMap,
ExpectedMapColon,
ExpectedMapComma,
ExpectedMapEnd,
ExpectedEnum,
ExpectedSingleChar,
InvalidEscapeSequence,
TrailingCharacters,
UnexpectedChar,
}
#[derive(Debug)]
#[non_exhaustive]
pub enum Error {
Syntax {
line: usize,
col: usize, code: ErrorCode,
at: String, },
Serde {
line: usize,
col: usize, message: String,
},
RawSerde(String),
Utf8(Utf8Error),
Io(io::Error),
}
impl Error {
pub fn is_eof(&self) -> bool {
matches!(self, Error::Syntax { code: ErrorCode::Eof, .. })
}
}
impl de::Error for Error {
fn custom<T: fmt::Display>(msg: T) -> Self {
Error::RawSerde(msg.to_string())
}
}
impl From<Utf8Error> for Error {
fn from(source: Utf8Error) -> Self {
Self::Utf8(source)
}
}
impl From<io::Error> for Error {
fn from(source: io::Error) -> Self {
Self::Io(source)
}
}
impl fmt::Display for Error {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
match self {
Self::Syntax { line, col, code, at } => {
write!(formatter, "{:?} at {}:{} at {:?}", code, line, col, at)
}
Self::Serde { line, col, message } => {
write!(formatter, "{:?} near {}:{}", message, line, col)
}
Self::RawSerde(msg) => {
write!(formatter, "error message: {:?}", msg)
}
Self::Utf8(source) => {
source.fmt(formatter)
}
Self::Io(source) => {
source.fmt(formatter)
}
}
}
}
impl std::error::Error for Error {}