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Diffstat (limited to 'vendor/miette/src/eyreish/into_diagnostic.rs')
-rw-r--r-- | vendor/miette/src/eyreish/into_diagnostic.rs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/vendor/miette/src/eyreish/into_diagnostic.rs b/vendor/miette/src/eyreish/into_diagnostic.rs new file mode 100644 index 0000000..6480013 --- /dev/null +++ b/vendor/miette/src/eyreish/into_diagnostic.rs @@ -0,0 +1,33 @@ +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()) + } +} |