Fix immutable_type for Python 3.9

!test

Author: awolverp

src/bridge/cache.rs

@@ -2,7 +2,8 @@ use crate::common::Entry;
 use crate::common::ObservedIterator;
 use crate::common::PreHashObject;
 
-#[pyo3::pyclass(module = "cachebox._core", frozen, immutable_type)]
+#[cfg_attr(Py_3_9, pyo3::pyclass(module = "cachebox._core", frozen))]
+#[cfg_attr(not(Py_3_9), pyo3::pyclass(module = "cachebox._core", frozen, immutable_type))]
 pub struct Cache {
     raw: crate::common::Mutex<crate::policies::nopolicy::NoPolicy>,
 }

src/bridge/fifocache.rs

@@ -2,7 +2,8 @@ use crate::common::Entry;
 use crate::common::ObservedIterator;
 use crate::common::PreHashObject;
 
-#[pyo3::pyclass(module = "cachebox._core", frozen, immutable_type)]
+#[cfg_attr(Py_3_9, pyo3::pyclass(module = "cachebox._core", frozen))]
+#[cfg_attr(not(Py_3_9), pyo3::pyclass(module = "cachebox._core", frozen, immutable_type))]
 pub struct FIFOCache {
     raw: crate::common::Mutex<crate::policies::fifo::FIFOPolicy>,
 }

src/bridge/lfucache.rs

@@ -2,7 +2,8 @@ use crate::common::Entry;
 use crate::common::ObservedIterator;
 use crate::common::PreHashObject;
 
-#[pyo3::pyclass(module = "cachebox._core", frozen, immutable_type)]
+#[cfg_attr(Py_3_9, pyo3::pyclass(module = "cachebox._core", frozen))]
+#[cfg_attr(not(Py_3_9), pyo3::pyclass(module = "cachebox._core", frozen, immutable_type))]
 pub struct LFUCache {
     raw: crate::common::Mutex<crate::policies::lfu::LFUPolicy>,
 }

src/bridge/lrucache.rs

@@ -2,7 +2,8 @@ use crate::common::Entry;
 use crate::common::ObservedIterator;
 use crate::common::PreHashObject;
 
-#[pyo3::pyclass(module = "cachebox._core", frozen, immutable_type)]
+#[cfg_attr(Py_3_9, pyo3::pyclass(module = "cachebox._core", frozen))]
+#[cfg_attr(not(Py_3_9), pyo3::pyclass(module = "cachebox._core", frozen, immutable_type))]
 pub struct LRUCache {
     raw: crate::common::Mutex<crate::policies::lru::LRUPolicy>,
 }

src/bridge/mod.rs

@@ -3,7 +3,8 @@ use pyo3::types::PyTypeMethods;
 
 create_exception!(cachebox._core, CoreKeyError, pyo3::exceptions::PyException);
 
-#[pyo3::pyclass(module = "cachebox._cachebox", subclass, frozen, immutable_type)]
+#[cfg_attr(Py_3_9, pyo3::pyclass(module = "cachebox._core", frozen, subclass))]
+#[cfg_attr(not(Py_3_9), pyo3::pyclass(module = "cachebox._core", frozen, immutable_type, subclass))]
 pub struct BaseCacheImpl {}
 
 #[pyo3::pymethods]
@@ -38,7 +39,8 @@ impl BaseCacheImpl {
     }
 }
 
-#[pyo3::pyclass(module = "cachebox._core", frozen, immutable_type)]
+#[cfg_attr(Py_3_9, pyo3::pyclass(module = "cachebox._core", frozen))]
+#[cfg_attr(not(Py_3_9), pyo3::pyclass(module = "cachebox._core", frozen, immutable_type))]
 pub struct TTLPair {
     key: pyo3::Py<pyo3::PyAny>,
     value: pyo3::Py<pyo3::PyAny>,

src/bridge/rrcache.rs

@@ -3,7 +3,8 @@ use crate::common::Entry;
 use crate::common::ObservedIterator;
 use crate::common::PreHashObject;
 
-#[pyo3::pyclass(module = "cachebox._core", frozen, immutable_type)]
+#[cfg_attr(Py_3_9, pyo3::pyclass(module = "cachebox._core", frozen))]
+#[cfg_attr(not(Py_3_9), pyo3::pyclass(module = "cachebox._core", frozen, immutable_type))]
 pub struct RRCache {
     raw: crate::common::Mutex<crate::policies::random::RandomPolicy>,
 }

src/bridge/ttlcache.rs

@@ -3,13 +3,15 @@ use crate::common::ObservedIterator;
 use crate::common::PreHashObject;
 use crate::common::TimeToLivePair;
 
-#[pyo3::pyclass(module = "cachebox._core", frozen, immutable_type)]
+#[cfg_attr(Py_3_9, pyo3::pyclass(module = "cachebox._core", frozen))]
+#[cfg_attr(not(Py_3_9), pyo3::pyclass(module = "cachebox._core", frozen, immutable_type))]
 pub struct TTLCache {
     raw: crate::common::Mutex<crate::policies::ttl::TTLPolicy>,
 }
 
 #[allow(non_camel_case_types)]
-#[pyo3::pyclass(module = "cachebox._core", immutable_type)]
+#[cfg_attr(Py_3_9, pyo3::pyclass(module = "cachebox._core"))]
+#[cfg_attr(not(Py_3_9), pyo3::pyclass(module = "cachebox._core", immutable_type))]
 pub struct ttlcache_items {
     pub ptr: ObservedIterator,
     pub iter: crate::common::Mutex<crate::policies::ttl::TTLIterator>,

src/bridge/vttlcache.rs

@@ -3,7 +3,8 @@ use crate::common::ObservedIterator;
 use crate::common::PreHashObject;
 use crate::common::TimeToLivePair;
 
-#[pyo3::pyclass(module = "cachebox._core", frozen, immutable_type)]
+#[cfg_attr(Py_3_9, pyo3::pyclass(module = "cachebox._core", frozen))]
+#[cfg_attr(not(Py_3_9), pyo3::pyclass(module = "cachebox._core", frozen, immutable_type))]
 pub struct VTTLCache {
     raw: crate::common::Mutex<crate::policies::vttl::VTTLPolicy>,
 }