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Change Error to use custom fmt::Debug messages (#152)

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std::error::Error::description is deprecated, so I changed the
fmt::Display implementation to rely on fmt::Debug implementation, which,
in turn, return human-readable messages like description was doing
This commit is contained in:
Lev Eniseev 2020-03-18 20:53:24 +03:00 committed by GitHub
parent 8ee5269fa2
commit 096147f288
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 22 deletions
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33
src/error.rs
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@ -1,9 +1,7 @@
use std::error::Error as StdError;
use std::fmt; use std::fmt;
/// Errors that can be return from various operatiors /// Errors that can be returned from various operations
/// ///
#[derive(Debug)]
pub enum Error { pub enum Error {
/// Returned if menu Menu function isn't supported /// Returned if menu Menu function isn't supported
MenusNotSupported, MenusNotSupported,
@ -15,22 +13,13 @@ pub enum Error {
UpdateFailed(String), UpdateFailed(String),
} }
impl StdError for Error { impl fmt::Debug for Error {
fn description(&self) -> &str { fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self { match *self {
Error::MenusNotSupported => "Menus not supported", Error::MenusNotSupported => write!(formatter, "Menus not supported"),
Error::MenuExists(_) => "Menu already exists", Error::MenuExists(_) => write!(formatter, "Menu already exists"),
Error::WindowCreate(_) => "Failed to create window", Error::WindowCreate(_) => write!(formatter, "Failed to create window"),
Error::UpdateFailed(_) => "Failed to Update", Error::UpdateFailed(_) => write!(formatter, "Failed to Update"),
}
}
fn cause(&self) -> Option<&dyn StdError> {
match *self {
Error::MenusNotSupported => None,
Error::MenuExists(_) => None,
Error::WindowCreate(_) => None,
Error::UpdateFailed(_) => None,
} }
} }
} }
@ -38,10 +27,10 @@ impl StdError for Error {
impl fmt::Display for Error { impl fmt::Display for Error {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
match *self { match *self {
Error::MenusNotSupported => write!(fmt, "{}", self.description()), Error::MenusNotSupported => write!(fmt, "{:?}", self),
Error::MenuExists(ref e) => write!(fmt, "{} {:?}", self.description(), e), Error::MenuExists(ref e) => write!(fmt, "{:?} {:?}", self, e),
Error::WindowCreate(ref e) => write!(fmt, "{} {:?}", self.description(), e), Error::WindowCreate(ref e) => write!(fmt, "{:?} {:?}", self, e),
Error::UpdateFailed(ref e) => write!(fmt, "{} {:?}", self.description(), e), Error::UpdateFailed(ref e) => write!(fmt, "{:?} {:?}", self, e),
} }
} }
} }