1 files changed, 12 insertions, 0 deletions
diff --git a/vendor/cxx/src/hash.rs b/vendor/cxx/src/hash.rs
new file mode 100644
index 000000000..4c92173f7
--- /dev/null
+++ b/vendor/cxx/src/hash.rs
@@ -0,0 +1,12 @@
+use core::hash::{Hash, Hasher};
+
+#[doc(hidden)]
+pub fn hash<V: Hash>(value: &V) -> usize {
+    #[cfg(feature = "std")]
+    let mut hasher = std::collections::hash_map::DefaultHasher::new();
+    #[cfg(not(feature = "std"))]
+    let mut hasher = crate::sip::SipHasher13::new();
+
+    Hash::hash(value, &mut hasher);
+    Hasher::finish(&hasher) as usize
+}