61 lines
1.3 KiB
Rust
61 lines
1.3 KiB
Rust
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use std::error::Error;
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use std::clone::Clone;
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use std::fmt::Error as FmtError;
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use std::fmt::{Debug, Display, Formatter};
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use std::fmt;
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub enum TodoErrorKind {
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ConversionError,
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}
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fn todo_error_type_as_str(e: &TodoErrorKind) -> &'static str {
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match e {
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&TodoErrorKind::ConversionError => "Conversion Error",
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}
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}
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impl Display for TodoErrorKind {
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fn fmt(&self, fmt: &mut Formatter) -> Result<(), FmtError> {
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try!(write!(fmt, "{}", todo_error_type_as_str(self)));
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Ok(())
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}
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}
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#[derive(Debug)]
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pub struct TodoError {
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err_type : TodoErrorKind,
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cause : Option<Box<Error>>,
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}
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impl TodoError {
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pub fn new(errtype : TodoErrorKind, cause : Option<Box<Error>>) -> TodoError {
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TodoError {
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err_type : errtype,
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cause : cause,
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}
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}
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pub fn err_type(&self) -> TodoErrorKind {
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self.err_type.clone()
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}
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}
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impl Display for TodoError {
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fn fmt(&self, fmt : &mut Formatter) -> Result<(), FmtError> {
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try!(write!(fmt, "[{}]", todo_error_type_as_str(&self.err_type.clone())));
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Ok(())
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}
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}
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impl Error for TodoError {
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fn description(&self) -> &str {
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todo_error_type_as_str(&self.err_type.clone())
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}
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fn cause(&self) -> Option<&Error> {
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self.cause.as_ref().map(|e| &**e)
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}
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}
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