Remove ToPythonPointer from public API

src/conversion.rs

@@ -47,8 +47,8 @@ pub trait ToPyObject<'p> {
     #[inline]
     fn with_borrowed_ptr<F, R>(&self, py: Python<'p>, f: F) -> R
       where F: FnOnce(*mut ffi::PyObject) -> R {
-        let obj = self.to_py_object(py);
+        let obj = self.to_py_object(py).into_object();
-        f(ToPythonPointer::as_ptr(&obj))
+        f(obj.as_ptr())
     }
 
     // FFI functions that accept a borrowed reference will use:

src/function.rs

@@ -48,7 +48,7 @@ macro_rules! py_fn {
             match $f(py, &args) {
                 Ok(val) => {
                     let obj = $crate::ToPyObject::into_py_object(val, py);
-                    return $crate::ToPythonPointer::steal_ptr(obj);
+                    return $crate::PythonObject::into_object(obj).steal_ptr();
                 }
                 Err(e) => {
                     e.restore();

src/lib.rs

@@ -86,7 +86,7 @@ extern crate python3_sys as ffi;
 pub use ffi::Py_ssize_t;
 pub use err::{PyErr, PyResult};
 pub use objects::*;
-pub use python::{Python, PythonObject, PythonObjectWithCheckedDowncast, PythonObjectWithTypeObject, ToPythonPointer};
+pub use python::{Python, PythonObject, PythonObjectWithCheckedDowncast, PythonObjectWithTypeObject};
 pub use pythonrun::{GILGuard, GILProtected, prepare_freethreaded_python};
 pub use conversion::{FromPyObject, ToPyObject};
 pub use objectprotocol::{ObjectProtocol};
@@ -277,7 +277,7 @@ pub unsafe fn py_module_initializer_impl(
             }
         };
         match init(py, &module) {
-            Ok(()) => module.steal_ptr(),
+            Ok(()) => module.into_object().steal_ptr(),
             Err(e) => {
                 e.restore();
                 return ptr::null_mut();

src/objects/mod.rs

@@ -44,18 +44,6 @@ macro_rules! pyobject_newtype(
         #[derive(Clone)]
         pub struct $name<'p>(::objects::object::PyObject<'p>);
 
-        impl <'p> ::python::ToPythonPointer for $name<'p> {
-            #[inline]
-            fn as_ptr(&self) -> *mut ::ffi::PyObject {
-                ::python::ToPythonPointer::as_ptr(&self.0)
-            }
-            
-            #[inline]
-            fn steal_ptr(self) -> *mut ::ffi::PyObject {
-                ::python::ToPythonPointer::steal_ptr(self.0)
-            }
-        }
-
         impl <'p> ::python::PythonObject<'p> for $name<'p> {
             #[inline]
             fn as_object(&self) -> &::objects::object::PyObject<'p> {

src/objects/object.rs

@@ -98,21 +98,6 @@ impl <'p> PythonObjectWithTypeObject<'p> for PyObject<'p> {
     }
 }
 
-impl <'p> ToPythonPointer for PyObject<'p> {
-    #[inline]
-    fn as_ptr(&self) -> *mut ffi::PyObject {
-        self.ptr
-    }
-    
-    #[inline]
-    fn steal_ptr(self) -> *mut ffi::PyObject {
-        let ptr = self.ptr;
-        mem::forget(self);
-        ptr
-    }
-}
-
-
 impl <'p> PyObject<'p> {
     /// Creates a PyObject instance for the given FFI pointer.
     /// This moves ownership over the pointer into the PyObject.
@@ -154,7 +139,24 @@ impl <'p> PyObject<'p> {
             Some(PyObject::from_borrowed_ptr(py, ptr))
         }
     }
-    
+
+    /// Gets the underlying FFI pointer.
+    /// Returns a borrowed pointer.
+    #[inline]
+    pub fn as_ptr(&self) -> *mut ffi::PyObject {
+        self.ptr
+    }
+
+    /// Gets the underlying FFI pointer.
+    /// Consumes `self` without calling `Py_DECREF()`, thus returning an owned pointer.
+    #[inline]
+    #[must_use]
+    pub fn steal_ptr(self) -> *mut ffi::PyObject {
+        let ptr = self.ptr;
+        mem::forget(self);
+        ptr
+    }
+
     /// Transmutes an owned FFI pointer to `&PyObject`.
     /// Undefined behavior if the pointer is NULL or invalid.
     #[inline]
@@ -238,6 +240,19 @@ impl <'p> PartialEq for PyObject<'p> {
 /// `obj1 == obj2` in rust is equivalent to `obj1 is obj2` in python.
 impl <'p> Eq for PyObject<'p> { }
 
+impl <'p> ToPythonPointer for PyObject<'p> {
+    // forward to inherit methods
+    #[inline]
+    fn as_ptr(&self) -> *mut ffi::PyObject {
+        PyObject::as_ptr(self)
+    }
+    
+    #[inline]
+    fn steal_ptr(self) -> *mut ffi::PyObject {
+        PyObject::steal_ptr(self)
+    }
+}
+
 
 #[test]
 fn test_sizeof() {

src/objects/typeobject.rs

@@ -30,7 +30,7 @@ impl <'p> PyType<'p> {
     /// Retrieves the underlying FFI pointer associated with this python object.
     #[inline]
     pub fn as_type_ptr(&self) -> *mut ffi::PyTypeObject {
-        self.as_ptr() as *mut ffi::PyTypeObject
+        self.0.as_ptr() as *mut ffi::PyTypeObject
     }
 
     /// Retrieves the PyType instance for the given FFI pointer.
@@ -59,7 +59,7 @@ impl <'p> PyType<'p> {
       where A: ToPyObject<'p, ObjectType=PyTuple<'p>> {
         let py = self.python();
         args.with_borrowed_ptr(py, |args| unsafe {
-            result_from_owned_ptr(py, ffi::PyObject_Call(self.as_ptr(), args, kwargs.as_ptr()))
+            result_from_owned_ptr(py, ffi::PyObject_Call(self.0.as_ptr(), args, kwargs.as_ptr()))
         })
     }
 }

src/python.rs

@@ -50,10 +50,10 @@ pub trait ToPythonPointer {
 }
 
 /// Trait implemented by all python object types.
-pub trait PythonObject<'p> : 'p + Clone + ToPythonPointer {
+pub trait PythonObject<'p> : 'p + Clone {
     /// Casts the python object to PyObject.
     fn as_object(&self) -> &PyObject<'p>;
-    
+
     /// Casts the python object to PyObject.
     fn into_object(self) -> PyObject<'p>;
 
@@ -94,16 +94,15 @@ pub trait PythonObjectWithTypeObject<'p> : PythonObjectWithCheckedDowncast<'p> {
 impl <'a, 'p, T> ToPythonPointer for &'a T where T: PythonObject<'p> {
     #[inline]
     fn as_ptr(&self) -> *mut ffi::PyObject {
-        (**self).as_ptr()
+        self.as_object().as_ptr()
     }
     
     #[inline]
     fn steal_ptr(self) -> *mut ffi::PyObject {
-        (*self).clone().steal_ptr()
+        self.as_object().clone().steal_ptr()
     }
 }
 
-
 /// Convert None into a null pointer.
 impl <T> ToPythonPointer for Option<T> where T: ToPythonPointer {
     #[inline]

src/rustobject/method.rs

@@ -78,7 +78,7 @@ macro_rules! py_method {
             match $f(&slf, &args) {
                 Ok(val) => {
                     let obj = $crate::ToPyObject::into_py_object(val, py);
-                    return $crate::ToPythonPointer::steal_ptr(obj);
+                    return $crate::PythonObject::into_object(obj).steal_ptr();
                 }
                 Err(e) => {
                     e.restore();
@@ -167,7 +167,7 @@ macro_rules! py_class_method {
             match $f(&slf, &args) {
                 Ok(val) => {
                     let obj = $crate::ToPyObject::into_py_object(val, py);
-                    return $crate::ToPythonPointer::steal_ptr(obj);
+                    return $crate::PythonObject::into_object(obj).steal_ptr();
                 }
                 Err(e) => {
                     e.restore();

src/rustobject/mod.rs

@@ -121,7 +121,7 @@ impl <'p, T, B> PythonBaseObject<'p> for PyRustObject<'p, T, B> where T: 'static
     unsafe fn alloc(ty: &PyType<'p>, (val, base_val): Self::InitType) -> PyResult<'p, Self> {
         let obj = try!(B::alloc(ty, base_val));
         let offset = PyRustObject::<T, B>::offset() as isize;
-        ptr::write((obj.as_ptr() as *mut u8).offset(offset) as *mut T, val);
+        ptr::write((obj.as_object().as_ptr() as *mut u8).offset(offset) as *mut T, val);
         Ok(Self::unchecked_downcast_from(obj.into_object()))
     }
 
@@ -142,18 +142,6 @@ impl <'p, T, B> Clone for PyRustObject<'p, T, B> where T: 'static + Send, B: Pyt
     }
 }
 
-impl <'p, T, B> ToPythonPointer for PyRustObject<'p, T, B> where T: 'static + Send, B: PythonBaseObject<'p> {
-    #[inline]
-    fn as_ptr(&self) -> *mut ffi::PyObject {
-        self.obj.as_ptr()
-    }
-
-    #[inline]
-    fn steal_ptr(self) -> *mut ffi::PyObject {
-        self.obj.steal_ptr()
-    }
-}
-
 impl <'p, 's, T, B> ToPyObject<'p> for PyRustObject<'s, T, B> where T: 'static + Send, B: PythonBaseObject<'s> {
     type ObjectType = PyObject<'p>;
 
@@ -231,18 +219,6 @@ impl <'p, T, B> ops::Deref for PyRustType<'p, T, B> where T: 'p + Send, B: Pytho
     }
 }
 
-impl <'p, T> ToPythonPointer for PyRustType<'p, T> where T: 'p + Send {
-    #[inline]
-    fn as_ptr(&self) -> *mut ffi::PyObject {
-        self.type_obj.as_ptr()
-    }
-
-    #[inline]
-    fn steal_ptr(self) -> *mut ffi::PyObject {
-        self.type_obj.steal_ptr()
-    }
-}
-
 impl <'p, T> Clone for PyRustType<'p, T> where T: 'p + Send {
     #[inline]
     fn clone(&self) -> Self {

src/rustobject/typebuilder.rs

@@ -92,7 +92,7 @@ impl <'p, T> PyRustTypeBuilder<'p, T> where T: 'static + Send {
         unsafe {
             ffi::Py_XDECREF((*self.ht).ht_type.tp_base as *mut ffi::PyObject);
             (*self.ht).ht_type.tp_base = base_type.as_type_ptr();
-            ffi::Py_INCREF(base_type.as_ptr());
+            ffi::Py_INCREF(base_type.as_object().as_ptr());
         }
         PyRustTypeBuilder {
             type_obj: self.type_obj,