serde/serde_test/src/error.rs
2017-04-05 00:17:50 -07:00

57 lines
1.5 KiB
Rust

use std::error;
use std::fmt::{self, Display};
use serde::{ser, de};
use token::Token;
/// Error returned by the test `Serializer` and `Deserializer`.
#[derive(Clone, PartialEq, Debug)]
pub enum Error {
/// A custom error.
Message(String),
/// `Deserialize` was expecting a struct of one name, and another was found.
InvalidName(&'static str),
/// `Serialize` generated a token that didn't match the test.
UnexpectedToken(Token),
/// The expected token list was too short.
EndOfTokens,
}
impl ser::Error for Error {
fn custom<T: Display>(msg: T) -> Error {
Error::Message(msg.to_string())
}
}
impl de::Error for Error {
fn custom<T: Display>(msg: T) -> Error {
Error::Message(msg.to_string())
}
}
impl fmt::Display for Error {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::Message(ref msg) => formatter.write_str(msg),
Error::InvalidName(name) => write!(formatter, "invalid name `{}`", name),
Error::UnexpectedToken(_) => formatter.write_str("unexpected token"),
Error::EndOfTokens => formatter.write_str("end of tokens"),
}
}
}
impl error::Error for Error {
fn description(&self) -> &str {
match *self {
Error::Message(ref msg) => msg,
Error::InvalidName(_) => "invalid name",
Error::UnexpectedToken(_) => "unexpected token",
Error::EndOfTokens => "end of tokens",
}
}
}