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use std::error::Error;
use std::fmt::Error as FmtError;
use std::clone::Clone;
use std::fmt::{Display, Formatter};
/**
* Kind of store error
*/
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum TaskErrorKind {
ParserError,
NoStatus,
}
fn store_error_type_as_str(e: &TaskErrorKind) -> &'static str {
match e {
&TaskErrorKind::ParserError => "Parser Error",
&TaskErrorKind::NoStatus => "Task status is missing",
}
}
impl Display for TaskErrorKind {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
try!(write!(fmt, "{}", store_error_type_as_str(self)));
Ok(())
}
}
/**
* Store error type
*/
#[derive(Debug)]
pub struct TaskError {
err_type: TaskErrorKind,
cause: Option<Box<Error>>,
}
impl TaskError {
/**
* Build a new TaskError from an TaskErrorKind, optionally with cause
*/
pub fn new(errtype: TaskErrorKind, cause: Option<Box<Error>>)
-> TaskError
{
TaskError {
err_type: errtype,
cause: cause,
}
}
/**
* Get the error type of this TaskError
*/
pub fn err_type(&self) -> TaskErrorKind {
self.err_type.clone()
}
}
impl Display for TaskError {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
try!(write!(fmt, "[{}]", store_error_type_as_str(&self.err_type.clone())));
Ok(())
}
}
impl Error for TaskError {
fn description(&self) -> &str {
store_error_type_as_str(&self.err_type.clone())
}
fn cause(&self) -> Option<&Error> {
self.cause.as_ref().map(|e| &**e)
}
}
|
