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use failure::{Backtrace, Context, Fail};
use std::fmt;
pub type Result<T> = ::std::result::Result<T, Error>;
#[derive(Debug, Fail, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub enum ErrorKind {
#[fail(display = "opening WebIDL file")]
OpeningWebIDLFile,
#[fail(display = "reading WebIDL file")]
ReadingWebIDLFile,
#[fail(display = "parsing WebIDL source text at {}", _0)]
ParsingWebIDLSourcePos(usize),
#[fail(display = "parsing WebIDL source text")]
ParsingWebIDLSource,
}
#[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 fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(&self.inner, f)
}
}
impl Error {
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: inner }
}
}