oh make some stuff conditional

Author: msullivan

mypyc/codegen/emitclass.py

@@ -627,10 +627,10 @@ def generate_dealloc_for_class(cl: ClassIR,
     emitter.emit_line('{}({} *self)'.format(dealloc_func_name, cl.struct_name(emitter.names)))
     emitter.emit_line('{')
     emitter.emit_line('PyObject_GC_UnTrack(self);')
-    emitter.emit_line('Py_TRASHCAN_BEGIN(self, {})'.format(dealloc_func_name))
+    emitter.emit_line('CPy_TRASHCAN_BEGIN(self, {})'.format(dealloc_func_name))
     emitter.emit_line('{}(self);'.format(clear_func_name))
     emitter.emit_line('Py_TYPE(self)->tp_free((PyObject *)self);')
-    emitter.emit_line('Py_TRASHCAN_END')
+    emitter.emit_line('CPy_TRASHCAN_END')
     emitter.emit_line('}')
 
 

mypyc/lib-rt/CPy.h

@@ -453,6 +453,14 @@ void CPy_AddTraceback(const char *filename, const char *funcname, int line, PyOb
 
 // Misc operations
 
+#if PY_MAJOR_VERSION >= 3 && PY_MINOR_VERSION >= 8
+#define CPy_TRASHCAN_BEGIN(op, dealloc) Py_TRASHCAN_BEGIN(op, dealloc)
+#define CPy_TRASHCAN_END Py_TRASHCAN_END
+#else
+#define CPy_TRASHCAN_BEGIN(op, dealloc) Py_TRASHCAN_SAFE_BEGIN(op)
+#define CPy_TRASHCAN_END Py_TRASHCAN_SAFE_END
+#endif
+
 
 // mypy lets ints silently coerce to floats, so a mypyc runtime float
 // might be an int also