Fix compile errors in CPython 3.8b1 due to the tp_print/tp_vectorcall slots.

Closes GH-2976.

CHANGES.rst

@@ -2,6 +2,16 @@
 Cython Changelog
 ================
 
+0.29.10 (2019-06-0?)
+====================
+
+Bugs fixed
+----------
+
+* Fix compile errors in CPython 3.8b1 due to the new "tp_vectorcall" slots.
+  (Github issue #2976)
+
+
 0.29.9 (2019-05-29)
 ===================
 

Cython/Compiler/Nodes.py

@@ -4898,7 +4898,10 @@ class CClassDefNode(ClassDefNode):
                     code.error_goto(entry.pos)))
             # Don't inherit tp_print from builtin types, restoring the
             # behavior of using tp_repr or tp_str instead.
+            # ("tp_print" was renamed to "tp_vectorcall_offset" in Py3.8b1)
+            code.putln("#if PY_VERSION_HEX < 0x030800B1")
             code.putln("%s.tp_print = 0;" % typeobj_cname)
+            code.putln("#endif")
 
             # Use specialised attribute lookup for types with generic lookup but no instance dict.
             getattr_slot_func = TypeSlots.get_slot_code_by_name(scope, 'tp_getattro')

Cython/Compiler/TypeSlots.py

@@ -887,6 +887,7 @@ slot_table = (
     EmptySlot("tp_del"),
     EmptySlot("tp_version_tag"),
     EmptySlot("tp_finalize", ifdef="PY_VERSION_HEX >= 0x030400a1"),
+    EmptySlot("tp_vectorcall", ifdef="PY_VERSION_HEX >= 0x030800b1"),
 )
 
 #------------------------------------------------------------------------------------------

Cython/Utility/AsyncGen.c

@@ -421,6 +421,9 @@ static PyTypeObject __pyx_AsyncGenType_type = {
 #elif PY_VERSION_HEX >= 0x030400a1
     0,                                          /* tp_finalize */
 #endif
+#if PY_VERSION_HEX >= 0x030800b1
+    0,                                          /*tp_vectorcall*/
+#endif
 };
 
 
@@ -650,6 +653,9 @@ static PyTypeObject __pyx__PyAsyncGenASendType_type = {
 #if PY_VERSION_HEX >= 0x030400a1
     0,                                          /* tp_finalize */
 #endif
+#if PY_VERSION_HEX >= 0x030800b1
+    0,                                          /*tp_vectorcall*/
+#endif
 };
 
 
@@ -759,6 +765,9 @@ static PyTypeObject __pyx__PyAsyncGenWrappedValueType_type = {
 #if PY_VERSION_HEX >= 0x030400a1
     0,                                          /* tp_finalize */
 #endif
+#if PY_VERSION_HEX >= 0x030800b1
+    0,                                          /*tp_vectorcall*/
+#endif
 };
 
 
@@ -1038,6 +1047,9 @@ static PyTypeObject __pyx__PyAsyncGenAThrowType_type = {
 #if PY_VERSION_HEX >= 0x030400a1
     0,                                          /* tp_finalize */
 #endif
+#if PY_VERSION_HEX >= 0x030800b1
+    0,                                          /*tp_vectorcall*/
+#endif
 };
 
 

Cython/Utility/Coroutine.c

@@ -1497,6 +1497,9 @@ static PyTypeObject __pyx_CoroutineAwaitType_type = {
 #if PY_VERSION_HEX >= 0x030400a1
     0,                                  /*tp_finalize*/
 #endif
+#if PY_VERSION_HEX >= 0x030800b1
+    0,                                  /*tp_vectorcall*/
+#endif
 };
 
 #if PY_VERSION_HEX < 0x030500B1 || defined(__Pyx_IterableCoroutine_USED) || CYTHON_USE_ASYNC_SLOTS
@@ -1655,6 +1658,9 @@ static PyTypeObject __pyx_CoroutineType_type = {
 #elif PY_VERSION_HEX >= 0x030400a1
     0,                                  /*tp_finalize*/
 #endif
+#if PY_VERSION_HEX >= 0x030800b1
+    0,                                  /*tp_vectorcall*/
+#endif
 };
 
 static int __pyx_Coroutine_init(void) {
@@ -1760,6 +1766,9 @@ static PyTypeObject __pyx_IterableCoroutineType_type = {
 #if PY_VERSION_HEX >= 0x030400a1
     __Pyx_Coroutine_del,                /*tp_finalize*/
 #endif
+#if PY_VERSION_HEX >= 0x030800b1
+    0,                                  /*tp_vectorcall*/
+#endif
 };
 
 
@@ -1860,6 +1869,9 @@ static PyTypeObject __pyx_GeneratorType_type = {
 #elif PY_VERSION_HEX >= 0x030400a1
     0,                                  /*tp_finalize*/
 #endif
+#if PY_VERSION_HEX >= 0x030800b1
+    0,                                  /*tp_vectorcall*/
+#endif
 };
 
 static int __pyx_Generator_init(void) {

Cython/Utility/CythonFunction.c

@@ -730,6 +730,9 @@ static PyTypeObject __pyx_CyFunctionType_type = {
 #if PY_VERSION_HEX >= 0x030400a1
     0,                                  /*tp_finalize*/
 #endif
+#if PY_VERSION_HEX >= 0x030800b1
+    0,                                  /*tp_vectorcall*/
+#endif
 };
 
 
@@ -1203,6 +1206,9 @@ static PyTypeObject __pyx_FusedFunctionType_type = {
 #if PY_VERSION_HEX >= 0x030400a1
     0,                                  /*tp_finalize*/
 #endif
+#if PY_VERSION_HEX >= 0x030800b1
+    0,                                  /*tp_vectorcall*/
+#endif
 };
 
 static int __pyx_FusedFunction_init(void) {