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43 lines
781 B
43 lines
781 B
use std::{fmt,error};
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#[derive(Debug)]
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/// There was a non-matching file
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pub enum UnmatchError
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{
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Size,
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Data,
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Unknown,
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}
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impl error::Error for UnmatchError{}
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impl fmt::Display for UnmatchError
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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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match self {
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Self::Size => write!(f, "size differs"),
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Self::Data => write!(f, "data differs"),
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_ => write!(f, "unknown error"),
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}
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}
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}
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pub trait ResultPrintExt<T>
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{
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fn discard_msg(self, msg: impl AsRef<str>) -> Option<T>;
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}
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impl<T, E> ResultPrintExt<T> for Result<T,E>
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where E: std::fmt::Display
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{
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fn discard_msg(self, msg: impl AsRef<str>) -> Option<T> {
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match self {
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Ok(v) => Some(v),
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Err(e) => {
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eprintln!("{}: {}", msg.as_ref(), e);
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None
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},
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}
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}
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}
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