add as_ptr and into_ptr inherent methods

guide/src/class.md

@@ -351,7 +351,6 @@ that inherit native types. Even in such cases, you can unsafely get a base class
 # #[cfg(not(Py_LIMITED_API))] {
 # use pyo3::prelude::*;
 use pyo3::types::PyDict;
-use pyo3::AsPyPointer;
 use std::collections::HashMap;
 
 #[pyclass(extends=PyDict)]

guide/src/class/numeric.md

@@ -421,7 +421,6 @@ Let's create that helper function. The signature has to be `fn(&PyAny) -> PyResu
 use std::os::raw::c_ulong;
 use pyo3::prelude::*;
 use pyo3::ffi;
-use pyo3::conversion::AsPyPointer;
 
 fn wrap(obj: &PyAny) -> Result<i32, PyErr> {
     let py: Python<'_> = obj.py();

newsfragments/3359.added.md

@@ -0,0 +1 @@
+Add `as_ptr` and `into_ptr` inherent methods for `Py`, `PyAny`, `PyRef`, and `PyRefMut`.

pyo3-macros-backend/src/quotes.rs

@@ -10,6 +10,6 @@ pub(crate) fn ok_wrap(obj: TokenStream) -> TokenStream {
 
 pub(crate) fn map_result_into_ptr(result: TokenStream) -> TokenStream {
     quote! {
-        #result.map(_pyo3::IntoPyPointer::into_ptr)
+        #result.map(_pyo3::PyObject::into_ptr)
     }
 }

src/buffer.rs

@@ -18,9 +18,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 //! `PyBuffer` implementation
-use crate::{
-    err, exceptions::PyBufferError, ffi, AsPyPointer, FromPyObject, PyAny, PyResult, Python,
-};
+use crate::{err, exceptions::PyBufferError, ffi, FromPyObject, PyAny, PyResult, Python};
 use std::marker::PhantomData;
 use std::os::raw;
 use std::pin::Pin;

src/callback.rs

@@ -3,7 +3,6 @@
 use crate::err::{PyErr, PyResult};
 use crate::exceptions::PyOverflowError;
 use crate::ffi::{self, Py_hash_t};
-use crate::IntoPyPointer;
 use crate::{IntoPy, PyObject, Python};
 use std::isize;
 use std::os::raw::c_int;

src/conversion.rs

@@ -20,7 +20,6 @@ use std::ptr::NonNull;
 ///
 /// ```rust
 /// use pyo3::prelude::*;
-/// use pyo3::AsPyPointer;
 /// use pyo3::types::PyString;
 /// use pyo3::ffi;
 ///
@@ -40,7 +39,6 @@ use std::ptr::NonNull;
 ///
 /// ```rust,no_run
 /// # use pyo3::prelude::*;
-/// # use pyo3::AsPyPointer;
 /// # use pyo3::ffi;
 /// #
 /// Python::with_gil(|py| {
@@ -632,7 +630,7 @@ mod test_no_clone {}
 #[cfg(test)]
 mod tests {
     use crate::types::{IntoPyDict, PyAny, PyDict, PyList};
-    use crate::{AsPyPointer, PyObject, Python, ToPyObject};
+    use crate::{PyObject, Python, ToPyObject};
 
     use super::PyTryFrom;
 
@@ -676,6 +674,7 @@ mod tests {
     #[test]
     fn test_option_as_ptr() {
         Python::with_gil(|py| {
+            use crate::AsPyPointer;
             let mut option: Option<PyObject> = None;
             assert_eq!(option.as_ptr(), std::ptr::null_mut());
 

src/conversions/chrono.rs

@@ -45,7 +45,7 @@ use crate::types::{
     timezone_utc, PyDate, PyDateAccess, PyDateTime, PyDelta, PyDeltaAccess, PyTime, PyTimeAccess,
     PyTzInfo, PyTzInfoAccess, PyUnicode,
 };
-use crate::{AsPyPointer, FromPyObject, IntoPy, PyAny, PyObject, PyResult, Python, ToPyObject};
+use crate::{FromPyObject, IntoPy, PyAny, PyObject, PyResult, Python, ToPyObject};
 use chrono::offset::{FixedOffset, Utc};
 use chrono::{
     DateTime, Datelike, Duration, NaiveDate, NaiveDateTime, NaiveTime, Offset, TimeZone, Timelike,

src/conversions/num_bigint.rs

@@ -48,8 +48,7 @@
 //! ```
 
 use crate::{
-    ffi, types::*, AsPyPointer, FromPyObject, IntoPy, Py, PyAny, PyObject, PyResult, Python,
-    ToPyObject,
+    ffi, types::*, FromPyObject, IntoPy, Py, PyAny, PyObject, PyResult, Python, ToPyObject,
 };
 
 use num_bigint::{BigInt, BigUint};

src/conversions/num_complex.rs

@@ -94,8 +94,7 @@
 //! assert result == [complex(1,-1), complex(-2,0)]
 //! ```
 use crate::{
-    ffi, types::PyComplex, AsPyPointer, FromPyObject, PyAny, PyErr, PyObject, PyResult, Python,
-    ToPyObject,
+    ffi, types::PyComplex, FromPyObject, PyAny, PyErr, PyObject, PyResult, Python, ToPyObject,
 };
 use num_complex::Complex;
 use std::os::raw::c_double;

src/conversions/std/array.rs

@@ -1,4 +1,3 @@
-use crate::conversion::{AsPyPointer, IntoPyPointer};
 use crate::types::PySequence;
 use crate::{exceptions, PyErr};
 use crate::{

src/conversions/std/num.rs

@@ -1,8 +1,7 @@
 #[cfg(feature = "experimental-inspect")]
 use crate::inspect::types::TypeInfo;
 use crate::{
-    exceptions, ffi, AsPyPointer, FromPyObject, IntoPy, PyAny, PyErr, PyObject, PyResult, Python,
-    ToPyObject,
+    exceptions, ffi, FromPyObject, IntoPy, PyAny, PyErr, PyObject, PyResult, Python, ToPyObject,
 };
 use std::convert::TryFrom;
 use std::num::{

src/conversions/std/osstr.rs

@@ -1,7 +1,5 @@
 use crate::types::PyString;
-use crate::{
-    ffi, AsPyPointer, FromPyObject, IntoPy, PyAny, PyObject, PyResult, Python, ToPyObject,
-};
+use crate::{ffi, FromPyObject, IntoPy, PyAny, PyObject, PyResult, Python, ToPyObject};
 use std::borrow::Cow;
 use std::ffi::{OsStr, OsString};
 #[cfg(not(windows))]

src/err/err_state.rs

@@ -2,7 +2,7 @@ use crate::{
     exceptions::{PyBaseException, PyTypeError},
     ffi,
     types::{PyTraceback, PyType},
-    AsPyPointer, IntoPy, IntoPyPointer, Py, PyAny, PyObject, PyTypeInfo, Python,
+    IntoPy, Py, PyAny, PyObject, PyTypeInfo, Python,
 };
 
 #[derive(Clone)]
@@ -118,12 +118,20 @@ impl PyErrState {
                 ptype,
                 pvalue,
                 ptraceback,
-            } => (ptype.into_ptr(), pvalue.into_ptr(), ptraceback.into_ptr()),
+            } => (
+                ptype.into_ptr(),
+                pvalue.map_or(std::ptr::null_mut(), Py::into_ptr),
+                ptraceback.map_or(std::ptr::null_mut(), Py::into_ptr),
+            ),
             PyErrState::Normalized(PyErrStateNormalized {
                 ptype,
                 pvalue,
                 ptraceback,
-            }) => (ptype.into_ptr(), pvalue.into_ptr(), ptraceback.into_ptr()),
+            }) => (
+                ptype.into_ptr(),
+                pvalue.into_ptr(),
+                ptraceback.map_or(std::ptr::null_mut(), Py::into_ptr),
+            ),
         }
     }
 

src/err/mod.rs

@@ -5,7 +5,7 @@ use crate::{
     exceptions::{self, PyBaseException},
     ffi,
 };
-use crate::{AsPyPointer, IntoPy, IntoPyPointer, Py, PyAny, PyObject, Python, ToPyObject};
+use crate::{IntoPy, Py, PyAny, PyObject, Python, ToPyObject};
 use std::borrow::Cow;
 use std::cell::UnsafeCell;
 use std::ffi::CString;
@@ -443,7 +443,7 @@ impl PyErr {
                 self.get_type(py).as_ptr(),
                 self.value(py).as_ptr(),
                 self.traceback(py)
-                    .map_or(std::ptr::null_mut(), PyTraceback::as_ptr),
+                    .map_or(std::ptr::null_mut(), |traceback| traceback.as_ptr()),
             )
         }
     }
@@ -642,7 +642,7 @@ impl PyErr {
             // PyException_SetCause _steals_ a reference to cause, so must use .into_ptr()
             ffi::PyException_SetCause(
                 value.as_ptr(),
-                cause.map_or(std::ptr::null_mut(), IntoPyPointer::into_ptr),
+                cause.map_or(std::ptr::null_mut(), Py::into_ptr),
             );
         }
     }

src/exceptions.rs

@@ -42,7 +42,6 @@ macro_rules! impl_exception_boilerplate {
         impl ::std::error::Error for $name {
             fn source(&self) -> ::std::option::Option<&(dyn ::std::error::Error + 'static)> {
                 unsafe {
-                    use $crate::AsPyPointer;
                     let cause: &$crate::exceptions::PyBaseException = self
                         .py()
                         .from_owned_ptr_or_opt($crate::ffi::PyException_GetCause(self.as_ptr()))?;
@@ -101,7 +100,6 @@ macro_rules! import_exception {
         impl $name {
             fn type_object_raw(py: $crate::Python<'_>) -> *mut $crate::ffi::PyTypeObject {
                 use $crate::sync::GILOnceCell;
-                use $crate::AsPyPointer;
                 static TYPE_OBJECT: GILOnceCell<$crate::Py<$crate::types::PyType>> =
                     GILOnceCell::new();
 
@@ -240,7 +238,6 @@ macro_rules! create_exception_type_object {
         impl $name {
             fn type_object_raw(py: $crate::Python<'_>) -> *mut $crate::ffi::PyTypeObject {
                 use $crate::sync::GILOnceCell;
-                use $crate::AsPyPointer;
                 static TYPE_OBJECT: GILOnceCell<$crate::Py<$crate::types::PyType>> =
                     GILOnceCell::new();
 

src/ffi/tests.rs

@@ -1,5 +1,5 @@
 use crate::ffi::*;
-use crate::{AsPyPointer, Python};
+use crate::Python;
 
 #[cfg(not(Py_LIMITED_API))]
 use crate::{
@@ -256,7 +256,7 @@ fn test_get_tzinfo() {
 
     crate::Python::with_gil(|py| {
         use crate::types::{PyDateTime, PyTime};
-        use crate::{AsPyPointer, PyAny};
+        use crate::PyAny;
 
         let utc = timezone_utc(py);
 

src/gil.rs

@@ -507,7 +507,7 @@ fn decrement_gil_count() {
 #[cfg(test)]
 mod tests {
     use super::{gil_is_acquired, GILPool, GIL_COUNT, OWNED_OBJECTS, POOL};
-    use crate::{ffi, gil, AsPyPointer, IntoPyPointer, PyObject, Python, ToPyObject};
+    use crate::{ffi, gil, PyObject, Python, ToPyObject};
     #[cfg(not(target_arch = "wasm32"))]
     use parking_lot::{const_mutex, Condvar, Mutex};
     use std::ptr::NonNull;

src/impl_/extract_argument.rs

@@ -697,7 +697,7 @@ fn push_parameter_list(msg: &mut String, parameter_names: &[&str]) {
 mod tests {
     use crate::{
         types::{IntoPyDict, PyTuple},
-        AsPyPointer, PyAny, Python, ToPyObject,
+        PyAny, Python, ToPyObject,
     };
 
     use super::{push_parameter_list, FunctionDescription, NoVarargs, NoVarkeywords};

src/impl_/pyclass/lazy_type_object.rs

@@ -12,7 +12,7 @@ use crate::{
     pyclass::{create_type_object, PyClassTypeObject},
     sync::{GILOnceCell, GILProtected},
     types::PyType,
-    AsPyPointer, IntoPyPointer, PyClass, PyErr, PyMethodDefType, PyObject, PyResult, Python,
+    PyClass, PyErr, PyMethodDefType, PyObject, PyResult, Python,
 };
 
 use super::PyClassItemsIter;

src/impl_/trampoline.rs

@@ -11,7 +11,7 @@ use std::{
 
 use crate::{
     callback::PyCallbackOutput, ffi, impl_::panic::PanicTrap, methods::IPowModulo,
-    panic::PanicException, types::PyModule, GILPool, IntoPyPointer, Py, PyResult, Python,
+    panic::PanicException, types::PyModule, GILPool, Py, PyResult, Python,
 };
 
 #[inline]

src/instance.rs

@@ -1,13 +1,13 @@
 use crate::conversion::PyTryFrom;
 use crate::err::{self, PyDowncastError, PyErr, PyResult};
-use crate::gil;
 use crate::pycell::{PyBorrowError, PyBorrowMutError, PyCell};
 use crate::pyclass::boolean_struct::{False, True};
 use crate::types::{PyDict, PyString, PyTuple};
 use crate::{
-    ffi, AsPyPointer, FromPyObject, IntoPy, IntoPyPointer, PyAny, PyClass, PyClassInitializer,
-    PyRef, PyRefMut, PyTypeInfo, Python, ToPyObject,
+    ffi, FromPyObject, IntoPy, IntoPyPointer, PyAny, PyClass, PyClassInitializer, PyRef, PyRefMut,
+    PyTypeInfo, Python, ToPyObject,
 };
+use crate::{gil, AsPyPointer};
 use std::marker::PhantomData;
 use std::mem;
 use std::ptr::NonNull;
@@ -356,6 +356,36 @@ where
     }
 }
 
+impl<T> Py<T> {
+    /// Returns the raw FFI pointer represented by self.
+    ///
+    /// # Safety
+    ///
+    /// Callers are responsible for ensuring that the pointer does not outlive self.
+    ///
+    /// The reference is borrowed; callers should not decrease the reference count
+    /// when they are finished with the pointer.
+    #[inline]
+    pub fn as_ptr(&self) -> *mut ffi::PyObject {
+        self.0.as_ptr()
+    }
+
+    /// Returns an owned raw FFI pointer represented by self.
+    ///
+    /// # Safety
+    ///
+    /// Callers are responsible for ensuring that the pointer does not outlive self.
+    ///
+    /// The reference is owned; when finished the caller should either transfer ownership
+    /// of the pointer or decrease the reference count (e.g. with [`pyo3::ffi::Py_DecRef`](crate::ffi::Py_DecRef)).
+    #[inline]
+    pub fn into_ptr(self) -> *mut ffi::PyObject {
+        let ptr = self.0.as_ptr();
+        std::mem::forget(self);
+        ptr
+    }
+}
+
 impl<T> Py<T>
 where
     T: PyClass,

src/marker.rs

@@ -120,10 +120,7 @@ use crate::gil::{GILGuard, GILPool, SuspendGIL};
 use crate::impl_::not_send::NotSend;
 use crate::types::{PyAny, PyDict, PyModule, PyString, PyType};
 use crate::version::PythonVersionInfo;
-use crate::{
-    ffi, AsPyPointer, FromPyPointer, IntoPy, IntoPyPointer, Py, PyNativeType, PyObject, PyTryFrom,
-    PyTypeInfo,
-};
+use crate::{ffi, FromPyPointer, IntoPy, Py, PyNativeType, PyObject, PyTryFrom, PyTypeInfo};
 use std::ffi::{CStr, CString};
 use std::marker::PhantomData;
 use std::os::raw::c_int;
@@ -628,9 +625,9 @@ impl<'py> Python<'py> {
             }
 
             let globals = globals
-                .map(AsPyPointer::as_ptr)
+                .map(|dict| dict.as_ptr())
                 .unwrap_or_else(|| ffi::PyModule_GetDict(mptr));
-            let locals = locals.map(AsPyPointer::as_ptr).unwrap_or(globals);
+            let locals = locals.map(|dict| dict.as_ptr()).unwrap_or(globals);
 
             let code_obj = ffi::Py_CompileString(code.as_ptr(), "<string>\0".as_ptr() as _, start);
             if code_obj.is_null() {