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use std::error::Error;
use std::fmt;
#[derive(Debug, PartialEq)]
pub enum XmlErrorType {
CantOccur,
Unimplemented,
XmlSyntaxError,
XPathSyntaxError,
StaticError,
DynamicError,
TypeError,
}
const ERROR_PREFIX: [(XmlErrorType, &str); 7] = [
( XmlErrorType::CantOccur, "Can't Occur: problem in amxml library:" ),
( XmlErrorType::Unimplemented, "Feature not inplemented yet:" ),
( XmlErrorType::XmlSyntaxError, "Syntax Error in XML:" ),
( XmlErrorType::XPathSyntaxError, "Syntax Error in XPath:" ),
( XmlErrorType::StaticError, "Static Error:" ),
( XmlErrorType::DynamicError, "Dynamic Error:" ),
( XmlErrorType::TypeError, "Type Error:" ),
];
#[derive(Debug)]
pub struct XmlError {
error_type: XmlErrorType,
descri: String,
}
impl fmt::Display for XmlError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(self.description())
}
}
impl Error for XmlError {
fn description(&self) -> &str {
return self.descri.as_str();
}
}
pub fn xmlerror(error_type: XmlErrorType, descri: &str) -> Box<XmlError> {
let mut prefix = "Unknown error:";
for el in ERROR_PREFIX.iter() {
if el.0 == error_type {
prefix = el.1;
break;
}
}
return Box::new(XmlError {
error_type: error_type,
descri: format!("{} {}", prefix, descri),
});
}
macro_rules! cant_occur {
(
$( $e:expr ),*
) => {
xmlerror(XmlErrorType::CantOccur, &format!( $($e),+ ))
}
}
#[allow(unused_macros)]
macro_rules! uninplemented {
(
$( $e:expr ),*
) => {
xmlerror(XmlErrorType::Unimplemented, &format!( $($e),+ ))
}
}
macro_rules! xml_syntax_error {
(
$( $e:expr ),*
) => {
xmlerror(XmlErrorType::XmlSyntaxError, &format!( $($e),+ ))
}
}
macro_rules! xpath_syntax_error {
(
$( $e:expr ),*
) => {
xmlerror(XmlErrorType::XPathSyntaxError, &format!( $($e),+ ))
}
}
#[allow(unused_macros)]
macro_rules! static_error {
(
$( $e:expr ),*
) => {
xmlerror(XmlErrorType::StaticError, &format!( $($e),+ ))
}
}
#[allow(unused_macros)]
macro_rules! dynamic_error {
(
$( $e:expr ),*
) => {
xmlerror(XmlErrorType::DynamicError, &format!( $($e),+ ))
}
}
#[allow(unused_macros)]
macro_rules! type_error {
(
$( $e:expr ),*
) => {
xmlerror(XmlErrorType::TypeError, &format!( $($e),+ ))
}
}