70 lines
1.3 KiB
Rust
70 lines
1.3 KiB
Rust
//! Error handling.
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pub use failure::{Error, Fail};
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use std::fmt;
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macro_rules! ok {
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($v:expr, $msg:expr) => {
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match $v {
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Some(v) => Ok(v),
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None => Err(err_msg($msg)),
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}
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};
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}
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macro_rules! flag_ok {
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($t:ident, $v:expr) => {
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match $t::from_bits($v) {
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Some(v) => Ok(v),
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None => Err(err_msg(concat!("bad ", stringify!($t)))),
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}
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};
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}
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macro_rules! bail {
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($e:expr) => {
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return Err(err_msg($e));
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};
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}
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/// Returns an `Error` with a static string.
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pub fn err_msg(msg: &'static str) -> Error {Error::from(ErrMsg(msg))}
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impl ReprError
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{
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#[inline]
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pub fn new<T>(n: T) -> Self where T: Into<i64> {Self(n.into())}
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}
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impl Fail for ReprError {}
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impl Fail for ErrMsg {}
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impl fmt::Display for ReprError
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{
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
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{
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write!(f, "representation error (got {})", self.0)
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}
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}
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impl fmt::Display for ErrMsg
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{
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
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{
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f.write_str(self.0)
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}
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}
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/// A representation error for an integer.
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#[derive(Debug, PartialEq)]
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pub struct ReprError(i64);
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#[derive(Debug)]
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struct ErrMsg(&'static str);
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/// A generic `failure` based `Result` type.
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pub type ResultS<T> = Result<T, Error>;
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// EOF
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