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use std::error::Error;
use std::{fmt, io};
use nom::Needed;
pub struct PeelError {
pub code: ErrorType,
pub description: String,
pub cause: Option<Box<Error>>,
}
impl PeelError {
pub fn new(code: ErrorType, description: &str) -> Self {
PeelError {
code: code,
description: description.to_string(),
cause: None,
}
}
}
impl fmt::Display for PeelError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f,
"Code: {:?}, Description: {}",
self.code,
self.description)
}
}
impl fmt::Debug for PeelError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(self, f)
}
}
impl Error for PeelError {
fn description(&self) -> &str {
&self.description
}
}
macro_rules! from_error {
($($p:ty,)*) => (
$(impl From<$p> for PeelError {
fn from(err: $p) -> PeelError {
PeelError {
code: ErrorType::Other,
description: err.description().to_owned(),
cause: Some(Box::new(err)),
}
}
})*
)
}
from_error! {
io::Error,
}
#[derive(Debug, Eq, PartialEq)]
pub enum ErrorType {
NoTreeRoot,
NoParserSucceed,
Incomplete(Needed),
Other,
}