use crate::{ffi, Python};
pub trait PyClassDict {
const IS_DUMMY: bool = true;
fn new() -> Self;
#[inline]
fn clear_dict(&mut self, _py: Python) {}
private_decl! {}
}
pub trait PyClassWeakRef {
const IS_DUMMY: bool = true;
fn new() -> Self;
#[inline]
unsafe fn clear_weakrefs(&mut self, _obj: *mut ffi::PyObject, _py: Python) {}
private_decl! {}
}
pub struct PyClassDummySlot;
impl PyClassDict for PyClassDummySlot {
private_impl! {}
#[inline]
fn new() -> Self {
PyClassDummySlot
}
}
impl PyClassWeakRef for PyClassDummySlot {
private_impl! {}
#[inline]
fn new() -> Self {
PyClassDummySlot
}
}
#[repr(transparent)]
pub struct PyClassDictSlot(*mut ffi::PyObject);
impl PyClassDict for PyClassDictSlot {
private_impl! {}
const IS_DUMMY: bool = false;
#[inline]
fn new() -> Self {
Self(std::ptr::null_mut())
}
#[inline]
fn clear_dict(&mut self, _py: Python) {
if !self.0.is_null() {
unsafe { ffi::PyDict_Clear(self.0) }
}
}
}
#[repr(transparent)]
pub struct PyClassWeakRefSlot(*mut ffi::PyObject);
impl PyClassWeakRef for PyClassWeakRefSlot {
private_impl! {}
const IS_DUMMY: bool = false;
#[inline]
fn new() -> Self {
Self(std::ptr::null_mut())
}
#[inline]
unsafe fn clear_weakrefs(&mut self, obj: *mut ffi::PyObject, _py: Python) {
if !self.0.is_null() {
ffi::PyObject_ClearWeakRefs(obj)
}
}
}