Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/third_party/rust/arbitrary/src/error.rs b/third_party/rust/arbitrary/src/error.rs
new file mode 100644
index 0000000000..1d3df2a22e
--- /dev/null
+++ b/third_party/rust/arbitrary/src/error.rs
@@ -0,0 +1,53 @@
+use std::{error, fmt};
+
+/// An enumeration of buffer creation errors
+#[derive(Debug, Clone, Copy)]
+#[non_exhaustive]
+pub enum Error {
+    /// No choices were provided to the Unstructured::choose call
+    EmptyChoose,
+    /// There was not enough underlying data to fulfill some request for raw
+    /// bytes.
+    NotEnoughData,
+    /// The input bytes were not of the right format
+    IncorrectFormat,
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Error::EmptyChoose => write!(
+                f,
+                "`arbitrary::Unstructured::choose` must be given a non-empty set of choices"
+            ),
+            Error::NotEnoughData => write!(
+                f,
+                "There is not enough underlying raw data to construct an `Arbitrary` instance"
+            ),
+            Error::IncorrectFormat => write!(
+                f,
+                "The raw data is not of the correct format to construct this type"
+            ),
+        }
+    }
+}
+
+impl error::Error for Error {}
+
+/// A `Result` with the error type fixed as `arbitrary::Error`.
+///
+/// Either an `Ok(T)` or `Err(arbitrary::Error)`.
+pub type Result<T, E = Error> = std::result::Result<T, E>;
+
+#[cfg(test)]
+mod tests {
+    // Often people will import our custom `Result` type because 99.9% of
+    // results in a file will be `arbitrary::Result` but then have that one last
+    // 0.1% that want to have a custom error type. Don't make them prefix that
+    // 0.1% as `std::result::Result`; instead, let `arbitrary::Result` have an
+    // overridable error type.
+    #[test]
+    fn can_use_custom_error_types_with_result() -> super::Result<(), String> {
+        Ok(())
+    }
+}