Fix for python 3.12+

Author: neriyaco

.github/workflows/python-publish.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v3
@@ -52,7 +52,7 @@ jobs:
     runs-on: windows-2019
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v3
@@ -82,7 +82,7 @@ jobs:
     runs-on: macos-11
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v3

.github/workflows/python-test-linux.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v3

.github/workflows/python-test-macos.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v3

.github/workflows/python-test-windows.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v3

pyproject.toml

@@ -1,9 +1,6 @@
 [build-system]
-requires = [
-    # mesonpy, version 0.13.0 which isn't released yet
-    "meson-python @ git+https://github.com/mesonbuild/meson-python.git@61bb2b3315f4e312558778022ca6e87ffaed2700",
-]
-build-backend = 'mesonpy'
+build-backend = "mesonpy"
+requires = ["meson-python"]
 
 [project]
 name = "extype"
@@ -19,3 +16,11 @@ dynamic = ["version"]
 [tool.cibuildwheel]
 skip = "pp*"
 build-frontend = "build"
+
+[dependency-groups]
+dev = [
+    "meson>=1.10.1",
+    "meson-python>=0.17.1",
+    "ninja>=1.11.1.4",
+]
+test = ["pytest>=7.4.4", "typing-extensions>=4.7.1"]

src/extype/core.pyi

@@ -1,11 +1,16 @@
-from typing import Type, Dict, Any
-from . import Protocol
+from typing import Type, Dict, Any, TYPE_CHECKING
 
+if TYPE_CHECKING:
+    from .extension_utils import Protocol
 
 def get_type_dict(typ: Type) -> Dict[str, Any]: ...
 
 
-def implement_protocol_on_type(typ: Type, protocols: Protocol): ...
+def implement_protocol_on_type(typ: Type, protocols: "Protocol"): ...
 
 
 def enable_magic_method(typ: Type, method: str): ...
+
+
+if TYPE_CHECKING:
+    del Protocol

src/extype/extype.cpp

@@ -275,8 +275,24 @@ static PyObject *get_type_dict(PyObject *self, PyObject *args)
     PyTypeObject *type;
     PyArg_ParseTuple(args, "O", &type);
 
-    Py_INCREF(type->tp_dict);
-    return type->tp_dict;
+#if PY_VERSION_HEX >= 0x030C0000
+
+    auto dict = PyType_GetDict(type);
+
+#else
+    
+    auto dict = type->tp_dict;
+    
+#endif
+
+    if (dict == NULL)
+    {
+        PyErr_SetString(PyExc_RuntimeError, "type dict was null");
+        return NULL;
+    }
+    
+    Py_INCREF(dict);
+    return dict;
 }
 
 static MagicMethodLookupResult get_magic_method_slot(PyTypeObject *type, char const *name_str)
@@ -563,6 +579,7 @@ static PyObject *enable_magic_method(PyObject *self, PyObject *args)
 
     if (slot == NULL)
     {
+        PyErr_SetString(PyExc_RuntimeError, "slot was null");
         PyErr_SetString(PyExc_RuntimeError, "slot was null");
         return NULL;
     }