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feat(error): add Source trait (#202)

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Benoît Cortier 2023-10-03 19:39:55 -04:00 • committed by GitHub
parent 25d88c7f81
commit c670ab4331
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5 changed files with 48 additions and 32 deletions
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41
crates/ironrdp-error/src/lib.rs
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@ -5,20 +5,26 @@ extern crate alloc;
use core::fmt;
#[cfg(all(not(feature = "std"), feature = "alloc"))]
trait NoAllocSource: fmt::Display + fmt::Debug {}
#[cfg(feature = "std")]
pub trait Source: std::error::Error + Sync + Send + 'static {}
#[cfg(all(not(feature = "std"), feature = "alloc"))]
impl<T> NoAllocSource for T where T: fmt::Display + fmt::Debug {}
#[cfg(feature = "std")]
impl<T> Source for T where T: std::error::Error + Sync + Send + 'static {}
#[cfg(not(feature = "std"))]
pub trait Source: fmt::Display + fmt::Debug + Send + Sync + 'static {}
#[cfg(not(feature = "std"))]
impl<T> Source for T where T: fmt::Display + fmt::Debug + Send + Sync + 'static {}
#[derive(Debug)]
pub struct Error<Kind> {
pub context: &'static str,
pub kind: Kind,
#[cfg(feature = "std")]
source: Option<Box<dyn std::error::Error + Sync + Send + 'static>>,
source: Option<Box<dyn std::error::Error + Sync + Send>>,
#[cfg(all(not(feature = "std"), feature = "alloc"))]
source: Option<alloc::boxed::Box<dyn NoAllocSource + Sync + Send + 'static>>,
source: Option<alloc::boxed::Box<dyn Source>>,
}
impl<Kind> Error<Kind> {
@ -33,36 +39,25 @@ impl<Kind> Error<Kind> {
}
}
#[cfg(feature = "std")]
#[cold]
#[must_use]
pub fn with_source<E>(mut self, source: E) -> Self
pub fn with_source<E>(self, source: E) -> Self
where
E: std::error::Error + Sync + Send + 'static,
{
self.source = Some(Box::new(source));
self
}
#[cfg(all(not(feature = "std"), feature = "alloc"))]
#[cold]
#[must_use]
pub fn with_source<E>(mut self, source: E) -> Self
where
E: fmt::Display + fmt::Debug + Sync + Send + 'static,
E: Source,
{
#[cfg(feature = "alloc")]
{
self.source = Some(alloc::boxed::Box::new(source));
let mut this = self;
this.source = Some(alloc::boxed::Box::new(source));
this
}
// No source when no std and no alloc crates
#[cfg(not(feature = "alloc"))]
{
let _ = source;
self
}
self
}
pub fn into_other_kind<OtherKind>(self) -> Error<OtherKind>