34 lines
1.3 KiB
Rust
34 lines
1.3 KiB
Rust
use thiserror::Error;
|
|
|
|
use crate::{Diagnostic, Report};
|
|
|
|
/// Convenience [`Diagnostic`] that can be used as an "anonymous" wrapper for
|
|
/// Errors. This is intended to be paired with [`IntoDiagnostic`].
|
|
#[derive(Debug, Error)]
|
|
#[error(transparent)]
|
|
struct DiagnosticError(Box<dyn std::error::Error + Send + Sync + 'static>);
|
|
impl Diagnostic for DiagnosticError {}
|
|
|
|
/**
|
|
Convenience trait that adds a [`.into_diagnostic()`](IntoDiagnostic::into_diagnostic) method that converts a type implementing
|
|
[`std::error::Error`] to a [`Result<T, Report>`].
|
|
|
|
## Warning
|
|
|
|
Calling this on a type implementing [`Diagnostic`] will reduce it to the common denominator of
|
|
[`std::error::Error`]. Meaning all extra information provided by [`Diagnostic`] will be
|
|
inaccessible. If you have a type implementing [`Diagnostic`] consider simply returning it or using
|
|
[`Into`] or the [`Try`](std::ops::Try) operator (`?`).
|
|
*/
|
|
pub trait IntoDiagnostic<T, E> {
|
|
/// Converts [`Result`] types that return regular [`std::error::Error`]s
|
|
/// into a [`Result`] that returns a [`Diagnostic`].
|
|
fn into_diagnostic(self) -> Result<T, Report>;
|
|
}
|
|
|
|
impl<T, E: std::error::Error + Send + Sync + 'static> IntoDiagnostic<T, E> for Result<T, E> {
|
|
fn into_diagnostic(self) -> Result<T, Report> {
|
|
self.map_err(|e| DiagnosticError(Box::new(e)).into())
|
|
}
|
|
}
|