compatiibility for CPytthon descr_check

Author: youknowone

derive/src/pyclass.rs

@@ -452,8 +452,13 @@ fn extract_impl_items(mut items: Vec<ItemSig>) -> Result<TokenStream2, Diagnosti
             slot_ident,
             item_ident,
         } => {
+            let transform = if vec!["new", "call"].contains(&slot_ident.to_string().as_str()) {
+                quote! { ::rustpython_vm::function::IntoPyNativeFunc::into_func }
+            } else {
+                quote! { Box::new }
+            };
             let into_func = quote_spanned! {item_ident.span()=>
-                ::rustpython_vm::function::IntoPyNativeFunc::into_func(Self::#item_ident)
+                #transform(Self::#item_ident)
             };
             Some(quote! {
                 (*class.slots.borrow_mut()).#slot_ident = Some(#into_func);

tests/snippets/types_snippet.py

@@ -86,3 +86,7 @@ class C(B, BB):
     pass
 
 assert C.mro() == [C, B, A, BB, AA, object]
+
+
+assert type(Exception.args).__name__ == 'getset_descriptor'
+assert type(None).__bool__(None) is False

vm/src/obj/objbuiltinfunc.rs

@@ -3,9 +3,9 @@ use std::fmt;
 use crate::function::{OptionalArg, PyFuncArgs, PyNativeFunc};
 use crate::obj::objtype::PyClassRef;
 use crate::pyobject::{
-    IdProtocol, PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult, PyValue, TypeProtocol,
+    IdProtocol, PyClassImpl, PyContext, PyObjectRef, PyResult, PyValue, TypeProtocol,
 };
-use crate::slots::{PyBuiltinCallable, PyBuiltinDescriptor};
+use crate::slots::{SlotCall, SlotDescriptor};
 use crate::vm::VirtualMachine;
 
 #[pyclass]
@@ -35,13 +35,13 @@ impl PyBuiltinFunction {
     }
 }
 
-impl PyBuiltinCallable for PyBuiltinFunction {
+impl SlotCall for PyBuiltinFunction {
     fn call(&self, args: PyFuncArgs, vm: &VirtualMachine) -> PyResult {
         (self.value)(vm, args)
     }
 }
 
-#[pyimpl(with(PyBuiltinCallable))]
+#[pyimpl(with(SlotCall))]
 impl PyBuiltinFunction {}
 
 #[pyclass]
@@ -73,13 +73,17 @@ impl PyBuiltinMethod {
     }
 }
 
-impl PyBuiltinDescriptor for PyBuiltinMethod {
-    fn get(
-        zelf: PyRef<Self>,
-        obj: PyObjectRef,
-        cls: OptionalArg<PyObjectRef>,
+impl SlotDescriptor for PyBuiltinMethod {
+    fn descr_get(
         vm: &VirtualMachine,
+        zelf: PyObjectRef,
+        obj: Option<PyObjectRef>,
+        cls: OptionalArg<PyObjectRef>,
     ) -> PyResult {
+        let (zelf, obj) = match Self::_check(zelf, obj, vm) {
+            Ok(obj) => obj,
+            Err(result) => return result,
+        };
         if obj.is(&vm.get_none()) && !Self::_cls_is(&cls, &obj.class()) {
             Ok(zelf.into_object())
         } else {
@@ -88,13 +92,13 @@ impl PyBuiltinDescriptor for PyBuiltinMethod {
     }
 }
 
-impl PyBuiltinCallable for PyBuiltinMethod {
+impl SlotCall for PyBuiltinMethod {
     fn call(&self, args: PyFuncArgs, vm: &VirtualMachine) -> PyResult {
         (self.function.value)(vm, args)
     }
 }
 
-#[pyimpl(with(PyBuiltinDescriptor, PyBuiltinCallable))]
+#[pyimpl(with(SlotDescriptor, SlotCall))]
 impl PyBuiltinMethod {}
 
 pub fn init(context: &PyContext) {

vm/src/obj/objclassmethod.rs

@@ -3,7 +3,7 @@ use crate::function::OptionalArg;
 use crate::pyobject::{
     PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult, PyValue, TypeProtocol,
 };
-use crate::slots::PyBuiltinDescriptor;
+use crate::slots::SlotDescriptor;
 use crate::vm::VirtualMachine;
 
 /// classmethod(function) -> method
@@ -47,19 +47,20 @@ impl PyValue for PyClassMethod {
     }
 }
 
-impl PyBuiltinDescriptor for PyClassMethod {
-    fn get(
-        zelf: PyRef<Self>,
-        obj: PyObjectRef,
-        cls: OptionalArg<PyObjectRef>,
+impl SlotDescriptor for PyClassMethod {
+    fn descr_get(
         vm: &VirtualMachine,
+        zelf: PyObjectRef,
+        obj: Option<PyObjectRef>,
+        cls: OptionalArg<PyObjectRef>,
     ) -> PyResult {
+        let (zelf, obj) = Self::_unwrap(zelf, obj, vm)?;
         let cls = cls.unwrap_or_else(|| obj.class().into_object());
         Ok(vm.ctx.new_bound_method(zelf.callable.clone(), cls))
     }
 }
 
-#[pyimpl(with(PyBuiltinDescriptor), flags(BASETYPE))]
+#[pyimpl(with(SlotDescriptor), flags(BASETYPE))]
 impl PyClassMethod {
     #[pyslot]
     fn tp_new(

vm/src/obj/objfunction.rs

@@ -13,7 +13,7 @@ use crate::pyobject::{
     TypeProtocol,
 };
 use crate::scope::Scope;
-use crate::slots::{PyBuiltinCallable, PyBuiltinDescriptor};
+use crate::slots::{SlotCall, SlotDescriptor};
 use crate::vm::VirtualMachine;
 
 pub type PyFunctionRef = PyRef<PyFunction>;
@@ -27,13 +27,14 @@ pub struct PyFunction {
     kw_only_defaults: Option<PyDictRef>,
 }
 
-impl PyBuiltinDescriptor for PyFunction {
-    fn get(
-        zelf: PyRef<Self>,
-        obj: PyObjectRef,
-        cls: OptionalArg<PyObjectRef>,
+impl SlotDescriptor for PyFunction {
+    fn descr_get(
         vm: &VirtualMachine,
+        zelf: PyObjectRef,
+        obj: Option<PyObjectRef>,
+        cls: OptionalArg<PyObjectRef>,
     ) -> PyResult {
+        let (zelf, obj) = Self::_unwrap(zelf, obj, vm)?;
         if obj.is(&vm.get_none()) && !Self::_cls_is(&cls, &obj.class()) {
             Ok(zelf.into_object())
         } else {
@@ -240,7 +241,7 @@ impl PyValue for PyFunction {
     }
 }
 
-#[pyimpl(with(PyBuiltinDescriptor))]
+#[pyimpl(with(SlotDescriptor))]
 impl PyFunction {
     #[pyslot]
     #[pymethod(magic)]
@@ -272,7 +273,7 @@ pub struct PyBoundMethod {
     pub function: PyObjectRef,
 }
 
-impl PyBuiltinCallable for PyBoundMethod {
+impl SlotCall for PyBoundMethod {
     fn call(&self, args: PyFuncArgs, vm: &VirtualMachine) -> PyResult {
         let args = args.insert(self.object.clone());
         vm.invoke(&self.function, args)
@@ -285,7 +286,7 @@ impl PyBoundMethod {
     }
 }
 
-#[pyimpl(with(PyBuiltinCallable))]
+#[pyimpl(with(SlotCall))]
 impl PyBoundMethod {
     #[pymethod(magic)]
     fn getattribute(&self, name: PyStringRef, vm: &VirtualMachine) -> PyResult {

vm/src/obj/objgetset.rs

@@ -6,7 +6,7 @@ use crate::function::{OptionalArg, OwnedParam, RefParam};
 use crate::pyobject::{
     IntoPyObject, PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult, PyValue, TryFromObject,
 };
-use crate::slots::PyBuiltinDescriptor;
+use crate::slots::SlotDescriptor;
 use crate::vm::VirtualMachine;
 
 pub type PyGetterFunc = Box<dyn Fn(&VirtualMachine, PyObjectRef) -> PyResult>;
@@ -178,13 +178,17 @@ impl PyValue for PyGetSet {
 
 pub type PyGetSetRef = PyRef<PyGetSet>;
 
-impl PyBuiltinDescriptor for PyGetSet {
-    fn get(
-        zelf: PyRef<Self>,
-        obj: PyObjectRef,
-        _cls: OptionalArg<PyObjectRef>,
+impl SlotDescriptor for PyGetSet {
+    fn descr_get(
         vm: &VirtualMachine,
+        zelf: PyObjectRef,
+        obj: Option<PyObjectRef>,
+        _cls: OptionalArg<PyObjectRef>,
     ) -> PyResult {
+        let (zelf, obj) = match Self::_check(zelf, obj, vm) {
+            Ok(obj) => obj,
+            Err(result) => return result,
+        };
         if let Some(ref f) = zelf.getter {
             f(vm, obj)
         } else {
@@ -222,7 +226,7 @@ impl PyGetSet {
     }
 }
 
-#[pyimpl(with(PyBuiltinDescriptor))]
+#[pyimpl(with(SlotDescriptor))]
 impl PyGetSet {
     // Descriptor methods
 

vm/src/obj/objproperty.rs

@@ -9,7 +9,7 @@ use crate::pyobject::{
     IdProtocol, PyClassImpl, PyContext, PyObject, PyObjectRef, PyRef, PyResult, PyValue,
     TypeProtocol,
 };
-use crate::slots::PyBuiltinDescriptor;
+use crate::slots::SlotDescriptor;
 use crate::vm::VirtualMachine;
 
 // Read-only property, doesn't have __set__ or __delete__
@@ -27,13 +27,14 @@ impl PyValue for PyReadOnlyProperty {
 
 pub type PyReadOnlyPropertyRef = PyRef<PyReadOnlyProperty>;
 
-impl PyBuiltinDescriptor for PyReadOnlyProperty {
-    fn get(
-        zelf: PyRef<Self>,
-        obj: PyObjectRef,
-        cls: OptionalArg<PyObjectRef>,
+impl SlotDescriptor for PyReadOnlyProperty {
+    fn descr_get(
         vm: &VirtualMachine,
+        zelf: PyObjectRef,
+        obj: Option<PyObjectRef>,
+        cls: OptionalArg<PyObjectRef>,
     ) -> PyResult {
+        let (zelf, obj) = Self::_unwrap(zelf, obj, vm)?;
         if vm.is_none(&obj) {
             if Self::_cls_is(&cls, &vm.ctx.types.type_type) {
                 vm.invoke(&zelf.getter, cls.unwrap())
@@ -46,7 +47,7 @@ impl PyBuiltinDescriptor for PyReadOnlyProperty {
     }
 }
 
-#[pyimpl(with(PyBuiltinDescriptor))]
+#[pyimpl(with(SlotDescriptor))]
 impl PyReadOnlyProperty {}
 
 /// Property attribute.
@@ -110,13 +111,14 @@ struct PropertyArgs {
     doc: Option<PyObjectRef>,
 }
 
-impl PyBuiltinDescriptor for PyProperty {
-    fn get(
-        zelf: PyRef<Self>,
-        obj: PyObjectRef,
-        _cls: OptionalArg<PyObjectRef>,
+impl SlotDescriptor for PyProperty {
+    fn descr_get(
         vm: &VirtualMachine,
+        zelf: PyObjectRef,
+        obj: Option<PyObjectRef>,
+        _cls: OptionalArg<PyObjectRef>,
     ) -> PyResult {
+        let (zelf, obj) = Self::_unwrap(zelf, obj, vm)?;
         if let Some(getter) = zelf.getter.as_ref() {
             if obj.is(vm.ctx.none.as_object()) {
                 Ok(zelf.into_object())
@@ -129,7 +131,7 @@ impl PyBuiltinDescriptor for PyProperty {
     }
 }
 
-#[pyimpl(with(PyBuiltinDescriptor), flags(BASETYPE))]
+#[pyimpl(with(SlotDescriptor), flags(BASETYPE))]
 impl PyProperty {
     #[pyslot]
     fn tp_new(cls: PyClassRef, args: PropertyArgs, vm: &VirtualMachine) -> PyResult<PyPropertyRef> {

vm/src/obj/objstaticmethod.rs

@@ -1,7 +1,7 @@
 use super::objtype::PyClassRef;
 use crate::function::OptionalArg;
 use crate::pyobject::{PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult, PyValue};
-use crate::slots::PyBuiltinDescriptor;
+use crate::slots::SlotDescriptor;
 use crate::vm::VirtualMachine;
 
 #[pyclass(name = "staticmethod")]
@@ -17,18 +17,19 @@ impl PyValue for PyStaticMethod {
     }
 }
 
-impl PyBuiltinDescriptor for PyStaticMethod {
-    fn get(
-        zelf: PyRef<Self>,
-        _obj: PyObjectRef,
+impl SlotDescriptor for PyStaticMethod {
+    fn descr_get(
+        vm: &VirtualMachine,
+        zelf: PyObjectRef,
+        _obj: Option<PyObjectRef>,
         _cls: OptionalArg<PyObjectRef>,
-        _vm: &VirtualMachine,
     ) -> PyResult {
+        let zelf = Self::_zelf(zelf, vm)?;
         Ok(zelf.callable.clone())
     }
 }
 
-#[pyimpl(with(PyBuiltinDescriptor), flags(BASETYPE))]
+#[pyimpl(with(SlotDescriptor), flags(BASETYPE))]
 impl PyStaticMethod {
     #[pyslot]
     fn tp_new(

vm/src/obj/objtype.rs

@@ -9,7 +9,7 @@ use super::objproperty::PropertyBuilder;
 use super::objstr::PyStringRef;
 use super::objtuple::PyTuple;
 use super::objweakref::PyWeak;
-use crate::function::PyFuncArgs;
+use crate::function::{OptionalArg, PyFuncArgs};
 use crate::pyobject::{
     IdProtocol, PyAttributes, PyClassImpl, PyContext, PyIterable, PyObject, PyObjectRef, PyRef,
     PyResult, PyValue, TypeProtocol,
@@ -170,7 +170,11 @@ impl PyClassRef {
 
         if let Some(attr) = self.get_attr(&name) {
             let attr_class = attr.class();
-            if let Some(ref descriptor) = attr_class.get_attr("__get__") {
+            let slots = attr_class.slots.borrow();
+            if let Some(ref descr_get) = slots.descr_get {
+                return descr_get(vm, attr, None, OptionalArg::Present(self.into_object()));
+            } else if let Some(ref descriptor) = attr_class.get_attr("__get__") {
+                // TODO: is this nessessary?
                 return vm.invoke(descriptor, vec![attr, vm.get_none(), self.into_object()]);
             }
         }

vm/src/obj/objweakref.rs

@@ -3,7 +3,7 @@ use crate::function::{OptionalArg, PyFuncArgs};
 use crate::pyobject::{
     PyClassImpl, PyContext, PyObject, PyObjectPayload, PyObjectRef, PyRef, PyResult, PyValue,
 };
-use crate::slots::PyBuiltinCallable;
+use crate::slots::SlotCall;
 use crate::vm::VirtualMachine;
 
 use std::rc::{Rc, Weak};
@@ -34,14 +34,14 @@ impl PyValue for PyWeak {
 
 pub type PyWeakRef = PyRef<PyWeak>;
 
-impl PyBuiltinCallable for PyWeak {
+impl SlotCall for PyWeak {
     fn call(&self, args: PyFuncArgs, vm: &VirtualMachine) -> PyResult {
         args.bind::<()>(vm)?;
         Ok(self.referent.upgrade().unwrap_or_else(|| vm.get_none()))
     }
 }
 
-#[pyimpl(with(PyBuiltinCallable), flags(BASETYPE))]
+#[pyimpl(with(SlotCall), flags(BASETYPE))]
 impl PyWeak {
     // TODO callbacks
     #[pyslot]