Class PyTypesVisitor

Parser/asdl_c.py:835–1957

class PyTypesVisitor(PickleVisitor):

    def visitModule(self, mod):
        self.emit("""

typedef struct {
    PyObject_HEAD
    PyObject *dict;
} AST_object;

static void
ast_dealloc(PyObject *op)
{
    AST_object *self = (AST_object*)op;
    /* bpo-31095: UnTrack is needed before calling any callbacks */
    PyTypeObject *tp = Py_TYPE(self);
    PyObject_GC_UnTrack(self);
    Py_CLEAR(self->dict);
    freefunc free_func = PyType_GetSlot(tp, Py_tp_free);
    assert(free_func != NULL);
    free_func(self);
    Py_DECREF(tp);
}

static int
ast_traverse(PyObject *op, visitproc visit, void *arg)
{
    AST_object *self = (AST_object*)op;
    Py_VISIT(Py_TYPE(self));
    Py_VISIT(self->dict);
    return 0;
}

static int
ast_clear(PyObject *op)
{
    AST_object *self = (AST_object*)op;
    Py_CLEAR(self->dict);
    return 0;
}

static int
ast_type_init(PyObject *self, PyObject *args, PyObject *kw)
{
    struct ast_state *state = get_ast_state();
    if (state == NULL) {
        return -1;
    }

    Py_ssize_t i, numfields = 0;
    int res = -1;
    PyObject *key, *value, *fields, *attributes = NULL, *remaining_fields = NULL;

    fields = PyObject_GetAttr((PyObject*)Py_TYPE(self), state->_fields);
    if (fields == NULL) {
        goto cleanup;
    }