66 lines
1.7 KiB
Rust
66 lines
1.7 KiB
Rust
//! Error types.
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use std::fmt;
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use std::io;
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use std::error;
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#[doc(inline)]
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pub use postgres_shared::error::*;
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/// An error encountered when communicating with the Postgres server.
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#[derive(Debug)]
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pub enum Error {
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/// An error reported by the Postgres server.
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Db(Box<DbError>),
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/// An error communicating with the Postgres server.
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Io(io::Error),
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/// An error converting between Postgres and Rust types.
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Conversion(Box<error::Error + Sync + Send>),
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}
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impl fmt::Display for Error {
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fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
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try!(fmt.write_str(error::Error::description(self)));
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match *self {
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Error::Db(ref err) => write!(fmt, ": {}", err),
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Error::Io(ref err) => write!(fmt, ": {}", err),
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Error::Conversion(ref err) => write!(fmt, ": {}", err),
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}
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}
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}
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impl error::Error for Error {
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fn description(&self) -> &str {
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match *self {
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Error::Db(_) => "Error reported by Postgres",
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Error::Io(_) => "Error communicating with the server",
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Error::Conversion(_) => "Error converting between Postgres and Rust types",
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}
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}
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fn cause(&self) -> Option<&error::Error> {
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match *self {
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Error::Db(ref err) => Some(&**err),
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Error::Io(ref err) => Some(err),
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Error::Conversion(ref err) => Some(&**err),
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}
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}
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}
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impl From<DbError> for Error {
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fn from(err: DbError) -> Error {
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Error::Db(Box::new(err))
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}
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}
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impl From<io::Error> for Error {
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fn from(err: io::Error) -> Error {
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Error::Io(err)
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}
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}
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impl From<Error> for io::Error {
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fn from(err: Error) -> io::Error {
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io::Error::new(io::ErrorKind::Other, err)
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}
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}
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