Use the pyclass proc-macro to produce the implementation details of PySliceContainer.

Author: adamreichold

CHANGELOG.md

@@ -1,11 +1,12 @@
 # Changelog
 
 - Unreleased
+  - Fix build when PyO3's `multiple-pymethods` feature is used. ([#288](https://github.com/PyO3/rust-numpy/pull/288))
 
 - v0.16.0
-  - Bump PyO3 version to 0.16 ([#259](https://github.com/PyO3/rust-numpy/pull/212))
+  - Bump PyO3 version to 0.16 ([#259](https://github.com/PyO3/rust-numpy/pull/259))
   - Support object arrays ([#216](https://github.com/PyO3/rust-numpy/pull/216))
-  - Support borrowing arrays that are part of other Python objects via `PyArray::borrow_from_array` ([#230](https://github.com/PyO3/rust-numpy/pull/216))
+  - Support borrowing arrays that are part of other Python objects via `PyArray::borrow_from_array` ([#230](https://github.com/PyO3/rust-numpy/pull/230))
   - Fixed downcasting ignoring element type and dimensionality ([#265](https://github.com/PyO3/rust-numpy/pull/265))
   - `PyArray::new` is now `unsafe`, as it produces uninitialized arrays ([#220](https://github.com/PyO3/rust-numpy/pull/220))
   - `PyArray::iter`, `NpySingleIterBuilder::readwrite` and `NpyMultiIterBuilder::add_readwrite` are now `unsafe`, as they allow aliasing mutable references to be created ([#278/](https://github.com/PyO3/rust-numpy/pull/278))

Cargo.toml

@@ -19,7 +19,7 @@ libc = "0.2"
 num-complex = ">= 0.2, < 0.5"
 num-traits = "0.2"
 ndarray = ">= 0.13, < 0.16"
-pyo3 = { version = "0.16", default-features = false }
+pyo3 = { version = "0.16", default-features = false, features = ["macros"] }
 
 [dev-dependencies]
 pyo3 = { version = "0.16", features = ["auto-initialize"] }

examples/parallel/Cargo.toml

@@ -9,7 +9,7 @@ name = "rust_parallel"
 crate-type = ["cdylib"]
 
 [dependencies]
-pyo3 = { version = "0.16", features = ["extension-module"] }
+pyo3 = { version = "0.16", features = ["extension-module", "multiple-pymethods"] }
 numpy = { path = "../.." }
 ndarray = { version = "0.15", features = ["rayon", "blas"] }
 blas-src = { version = "0.8", features = ["openblas"] }

src/array.rs

@@ -121,7 +121,7 @@ unsafe impl<T: Element, D: Dimension> PyTypeInfo for PyArray<T, D> {
     type AsRefTarget = Self;
 
     const NAME: &'static str = "PyArray<T, D>";
-    const MODULE: ::std::option::Option<&'static str> = Some("numpy");
+    const MODULE: Option<&'static str> = Some("numpy");
 
     #[inline]
     fn type_object_raw(py: Python) -> *mut ffi::PyTypeObject {

src/dtype.rs

@@ -51,7 +51,7 @@ unsafe impl PyTypeInfo for PyArrayDescr {
     type AsRefTarget = Self;
 
     const NAME: &'static str = "PyArrayDescr";
-    const MODULE: ::std::option::Option<&'static str> = Some("numpy");
+    const MODULE: Option<&'static str> = Some("numpy");
 
     #[inline]
     fn type_object_raw(py: Python) -> *mut ffi::PyTypeObject {

src/slice_container.rs

@@ -1,15 +1,10 @@
 use std::{mem, slice};
 
 use ndarray::{ArrayBase, Dimension, OwnedRepr};
-use pyo3::{
-    ffi,
-    impl_::pyclass::{PyClassDummySlot, PyClassImpl, PyClassItems, ThreadCheckerStub},
-    pyclass::PyClass,
-    type_object::{LazyStaticType, PyTypeInfo},
-    PyAny, PyCell, Python,
-};
+use pyo3::pyclass;
 
 /// Utility type to safely store `Box<[_]>` or `Vec<_>` on the Python heap
+#[pyclass]
 pub(crate) struct PySliceContainer {
     ptr: *mut u8,
     len: usize,
@@ -84,32 +79,3 @@ impl Drop for PySliceContainer {
         }
     }
 }
-
-impl PyClass for PySliceContainer {
-    type Dict = PyClassDummySlot;
-    type WeakRef = PyClassDummySlot;
-    type BaseNativeType = PyAny;
-}
-
-impl PyClassImpl for PySliceContainer {
-    const DOC: &'static str = "Memory store for a PyArray backed by a Box<[_]> or a Vec<_> \0";
-
-    type BaseType = PyAny;
-    type Layout = PyCell<Self>;
-    type ThreadChecker = ThreadCheckerStub<Self>;
-
-    fn for_all_items(_visitor: &mut dyn FnMut(&PyClassItems)) {}
-}
-
-unsafe impl PyTypeInfo for PySliceContainer {
-    type AsRefTarget = PyCell<Self>;
-
-    const NAME: &'static str = "PySliceContainer";
-    const MODULE: Option<&'static str> = Some("_rust_numpy");
-
-    #[inline]
-    fn type_object_raw(py: Python) -> *mut ffi::PyTypeObject {
-        static TYPE_OBJECT: LazyStaticType = LazyStaticType::new();
-        TYPE_OBJECT.get_or_init::<Self>(py)
-    }
-}