7 use thiserror::Error;
9 pub type Result<T> = std::result::Result<T, Error>;
11 #[derive(Error, Debug, PartialEq)]
13 pub enum Error {  enum
124 impl Error {  implementation
127         T: std::error::Error + Send + Sync + 'static,  in from_std()
129         Error::Std(StdError(Box::new(error)))  in from_std()
132     pub fn downcast_ref<T: std::error::Error + 'static>(&self) -> Option<&T> {  in downcast_ref()
133         if let Error::Std(s) = self {  in downcast_ref()
141 #[derive(Debug, Error)]
143 pub struct IoError(#[from] pub io::Error);
152 impl From<io::Error> for Error {  implementation
153     fn from(e: io::Error) -> Self {  in from()
154         Error::Io(IoError(e))  in from()
166 #[derive(Debug, Error)]
168 pub struct StdError(pub Box<dyn std::error::Error + Send + Sync>);