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use failure::{Backtrace, Context, Fail};
use std::fmt;
use std::fmt::Display;
use std::io::Error as IOError;
use std::path::PathBuf;
#[derive(Fail, Debug)]
pub enum ErrorKind {
#[fail(display = "IO error")]
Io,
#[fail(display = "File error: {:?}", _0)]
File(PathBuf),
#[fail(display = "Include error")]
Include,
#[fail(display = "Parse error: {:?}", _0)]
Parse(Option<(PathBuf, usize)>),
#[fail(display = "Preprocess error")]
Preprocess,
#[fail(display = "Define argument not found: {}", _0)]
DefineArgNotFound(String),
#[fail(display = "Define not found: {}", _0)]
DefineNotFound(String),
#[fail(display = "Define must have argument")]
DefineNoArgs,
#[fail(display = "Exceed recursive limit")]
ExceedRecursiveLimit,
}
#[derive(Debug)]
pub struct Error {
inner: Context<ErrorKind>,
}
impl Fail for Error {
fn cause(&self) -> Option<&dyn Fail> {
self.inner.cause()
}
fn backtrace(&self) -> Option<&Backtrace> {
self.inner.backtrace()
}
}
impl Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
Display::fmt(&self.inner, f)
}
}
impl Error {
pub fn new(inner: Context<ErrorKind>) -> Error {
Error { inner }
}
pub fn kind(&self) -> &ErrorKind {
self.inner.get_context()
}
}
impl From<ErrorKind> for Error {
fn from(kind: ErrorKind) -> Error {
Error {
inner: Context::new(kind),
}
}
}
impl From<Context<ErrorKind>> for Error {
fn from(inner: Context<ErrorKind>) -> Error {
Error { inner }
}
}
impl From<IOError> for Error {
fn from(error: IOError) -> Error {
Error {
inner: error.context(ErrorKind::Io),
}
}
}