feat(core): add missing APIs

tfhe/src/core_crypto/commons/traits/container.rs

@@ -1,5 +1,7 @@
 //! Module with traits pertaining to container manipulation.
 
+use std::borrow::Cow;
+
 /// A trait to manipulate various immutable container types transparently.
 pub trait Container: AsRef<[Self::Element]> {
     type Element;
@@ -16,6 +18,10 @@ impl<T> Container for [T] {
     type Element = T;
 }
 
+impl<T: Clone> Container for Cow<'_, [T]> {
+    type Element = T;
+}
+
 impl<T> ContainerMut for [T] {}
 
 impl<T> Container for Vec<T> {

tfhe/src/core_crypto/entities/modulus_switched_lwe_ciphertext.rs

@@ -81,6 +81,14 @@ where
     SwitchedScalar: UnsignedInteger,
     C: Container<Element = Scalar>,
 {
+    pub fn into_raw_parts(self) -> (LweCiphertext<C>, Scalar, CiphertextModulusLog) {
+        (
+            self.lwe_in,
+            self.body_correction_to_add_before_switching,
+            self.log_modulus,
+        )
+    }
+
     #[track_caller]
     pub fn from_raw_parts(
         lwe_in: LweCiphertext<C>,