From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vendor/clap/src/parser/error.rs | 56 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 vendor/clap/src/parser/error.rs

(limited to 'vendor/clap/src/parser/error.rs')

diff --git a/vendor/clap/src/parser/error.rs b/vendor/clap/src/parser/error.rs
new file mode 100644
index 000000000..bdafa9ae5
--- /dev/null
+++ b/vendor/clap/src/parser/error.rs
@@ -0,0 +1,56 @@
+use crate::util::Id;
+
+/// Violation of [`ArgMatches`][crate::ArgMatches] assumptions
+#[derive(Clone, Debug)]
+#[allow(missing_copy_implementations)] // We might add non-Copy types in the future
+#[non_exhaustive]
+pub enum MatchesError {
+    /// Failed to downcast `AnyValue` to the specified type
+    #[non_exhaustive]
+    Downcast {
+        /// Type for value stored in [`ArgMatches`][crate::ArgMatches]
+        actual: super::AnyValueId,
+        /// The target type to downcast to
+        expected: super::AnyValueId,
+    },
+    /// Argument not defined in [`Command`][crate::Command]
+    #[non_exhaustive]
+    UnknownArgument {
+        // Missing `id` but blocked on a public id type which will hopefully come with `unstable-v4`
+    },
+}
+
+impl MatchesError {
+    #[track_caller]
+    pub(crate) fn unwrap<T>(id: &Id, r: Result<T, MatchesError>) -> T {
+        let err = match r {
+            Ok(t) => {
+                return t;
+            }
+            Err(err) => err,
+        };
+        panic!(
+            "Mismatch between definition and access of `{:?}`. {}",
+            id, err
+        )
+    }
+}
+
+impl std::error::Error for MatchesError {}
+
+impl std::fmt::Display for MatchesError {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match self {
+            Self::Downcast { actual, expected } => {
+                writeln!(
+                    f,
+                    "Could not downcast to {:?}, need to downcast to {:?}",
+                    expected, actual
+                )
+            }
+            Self::UnknownArgument {} => {
+                writeln!(f, "Unknown argument or group id.  Make sure you are using the argument id and not the short or long flags")
+            }
+        }
+    }
+}
-- 
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