1 files changed, 92 insertions, 0 deletions
diff --git a/vendor/clap-3.2.20/src/util/id.rs b/vendor/clap-3.2.20/src/util/id.rs
new file mode 100644
index 000000000..63a7e003e
--- /dev/null
+++ b/vendor/clap-3.2.20/src/util/id.rs
@@ -0,0 +1,92 @@
+use crate::util::fnv::Key;
+
+use std::{
+    fmt::{Debug, Formatter, Result},
+    hash::{Hash, Hasher},
+    ops::Deref,
+};
+
+#[derive(Clone, Eq, Default)]
+#[cfg_attr(not(debug_assertions), repr(transparent))]
+pub(crate) struct Id {
+    #[cfg(debug_assertions)]
+    name: String,
+    id: u64,
+}
+
+macro_rules! precomputed_hashes {
+    ($($fn_name:ident, $const:expr, $name:expr;)*) => {
+        impl Id {
+            $(
+                pub(crate) fn $fn_name() -> Self {
+                    Id {
+                        #[cfg(debug_assertions)]
+                        name: $name.into(),
+                        id: $const,
+                    }
+                }
+            )*
+        }
+    };
+}
+
+// precompute some common values
+precomputed_hashes! {
+    empty_hash,   0x1C9D_3ADB_639F_298E, "";
+    help_hash,    0x5963_6393_CFFB_FE5F, "help";
+    version_hash, 0x30FF_0B7C_4D07_9478, "version";
+}
+
+impl Id {
+    pub(crate) fn from_ref<T: Key>(val: T) -> Self {
+        Id {
+            #[cfg(debug_assertions)]
+            name: val.to_string(),
+            id: val.key(),
+        }
+    }
+}
+
+impl Debug for Id {
+    fn fmt(&self, f: &mut Formatter) -> Result {
+        #[cfg(debug_assertions)]
+        write!(f, "{}", self.name)?;
+        #[cfg(not(debug_assertions))]
+        write!(f, "[hash: {:X}]", self.id)?;
+
+        Ok(())
+    }
+}
+
+impl Deref for Id {
+    type Target = u64;
+
+    fn deref(&self) -> &Self::Target {
+        &self.id
+    }
+}
+
+impl<T: Key> From<T> for Id {
+    fn from(val: T) -> Self {
+        Id {
+            #[cfg(debug_assertions)]
+            name: val.to_string(),
+            id: val.key(),
+        }
+    }
+}
+
+impl Hash for Id {
+    fn hash<H>(&self, state: &mut H)
+    where
+        H: Hasher,
+    {
+        self.id.hash(state)
+    }
+}
+
+impl PartialEq for Id {
+    fn eq(&self, other: &Id) -> bool {
+        self.id == other.id
+    }
+}