extern crate json;
extern crate xml;
use std::error::Error;
use std::fmt;
use std::num;
use std::io;
use std::result;
macro_rules! some {
($x:expr, $msg:expr) => (try!($x.ok_or(CodeSpawnError::Other($msg.to_owned()))))
}
macro_rules! some_str {
($x:expr) => (some!($x, "Unable to fetch string."))
}
macro_rules! some_get {
($x:expr) => (some!($x, "Unable to fetch object."))
}
pub type Result<T> = result::Result<T, CodeSpawnError>;
#[derive(Debug)]
pub enum CodeSpawnError {
Io(io::Error),
Json(json::JsonError),
Xml(xml::reader::Error),
Other(String)
}
impl fmt::Display for CodeSpawnError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
CodeSpawnError::Io(ref err) => err.fmt(f),
CodeSpawnError::Json(ref err) => err.fmt(f),
CodeSpawnError::Xml(ref err) => err.fmt(f),
CodeSpawnError::Other(ref err) => err.fmt(f)
}
}
}
impl Error for CodeSpawnError {
fn description(&self) -> &str {
match *self {
CodeSpawnError::Io(ref err) => err.description(),
CodeSpawnError::Json(ref err) => err.description(),
CodeSpawnError::Xml(ref err) => err.description(),
CodeSpawnError::Other(ref err) => err
}
}
}
impl From<io::Error> for CodeSpawnError {
fn from(err: io::Error) -> CodeSpawnError {
CodeSpawnError::Io(err)
}
}
impl From<json::JsonError> for CodeSpawnError {
fn from(err: json::JsonError) -> CodeSpawnError {
CodeSpawnError::Json(err)
}
}
impl From<xml::reader::Error> for CodeSpawnError {
fn from(err: xml::reader::Error) -> CodeSpawnError {
CodeSpawnError::Xml(err)
}
}
impl From<String> for CodeSpawnError {
fn from(err: String) -> CodeSpawnError {
CodeSpawnError::Other(err)
}
}
impl From<num::ParseIntError> for CodeSpawnError {
fn from(err: num::ParseIntError) -> CodeSpawnError {
CodeSpawnError::Other(err.description().to_owned())
}
}