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Update changelog for v2.2.0
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Dean Moldovan
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@ -26,6 +26,8 @@ next sections for more details and alternative approaches that avoid this.
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The file :file:`tests/test_stl.cpp` contains a complete
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example that demonstrates how to pass STL data types in more detail.
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.. _cpp17_container_casters:
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C++17 library containers
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========================
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@ -406,6 +406,8 @@ name, i.e. by specifying ``py::arg().noconvert()``.
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need to specify a ``py::arg()`` annotation for each argument with the
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no-convert argument modified to ``py::arg().noconvert()``.
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.. _none_arguments:
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Allow/Prohibiting None arguments
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================================
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@ -9,7 +9,280 @@ Starting with version 1.8.0, pybind11 releases use a `semantic versioning
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v2.2.0 (Not yet released)
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-----------------------------------------------------
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* TBD
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* Support for embedding the Python interpreter. See the
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:doc:`documentation page </advanced/embedding>` for a
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full overview of the new features.
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`#774 <https://github.com/pybind/pybind11/pull/774>`_,
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`#889 <https://github.com/pybind/pybind11/pull/889>`_,
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`#892 <https://github.com/pybind/pybind11/pull/892>`_,
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`#920 <https://github.com/pybind/pybind11/pull/920>`_.
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.. code-block:: cpp
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#include <pybind11/embed.h>
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namespace py = pybind11;
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int main() {
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py::scoped_interpreter guard{}; // start the interpreter and keep it alive
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py::print("Hello, World!"); // use the Python API
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}
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* Support for inheriting from multiple C++ bases in Python.
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`#693 <https://github.com/pybind/pybind11/pull/693>`_.
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.. code-block:: python
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from cpp_module import CppBase1, CppBase2
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class PyDerived(CppBase1, CppBase2):
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def __init__(self):
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CppBase1.__init__(self) # C++ bases must be initialized explicitly
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CppBase2.__init__(self)
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* ``PYBIND11_MODULE`` is now the preferred way to create module entry points.
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``PYBIND11_PLUGIN`` is deprecated. See :ref:`macros` for details.
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`#879 <https://github.com/pybind/pybind11/pull/879>`_.
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.. code-block:: cpp
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// new
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PYBIND11_MODULE(example, m) {
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m.def("add", [](int a, int b) { return a + b; });
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}
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// old
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PYBIND11_PLUGIN(example) {
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py::module m("example");
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m.def("add", [](int a, int b) { return a + b; });
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return m.ptr();
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}
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* pybind11's headers and build system now more strictly enforce hidden symbol
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visibility for extension modules. This should be seamless for most users,
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but see the upgrade guide if you use a custom build system.
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* Support for ``py::module_local`` types which allow multiple modules to
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export the same C++ types without conflicts. This is useful for opaque
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types like ``std::vector<int>``. ``py::bind_vector`` and ``py::bind_map``
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now default to ``py::module_local`` if their elements are builtins or
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local types. See :ref:`module_local` for details.
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`#949 <https://github.com/pybind/pybind11/pull/949>`_,
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`#981 <https://github.com/pybind/pybind11/pull/981>`_,
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`#995 <https://github.com/pybind/pybind11/pull/995>`_,
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`#997 <https://github.com/pybind/pybind11/pull/997>`_.
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* Custom constructors can now be added very easily using lambdas or factory
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functions which return a class instance by value, pointer or holder. This
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supersedes the old placement-new ``__init__`` technique.
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See :ref:`custom_constructors` for details.
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`#805 <https://github.com/pybind/pybind11/pull/997>`_.
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.. code-block:: cpp
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struct Example {
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Example(std::string);
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};
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py::class_<Example>(m, "Example")
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.def(py::init<std::string>()) // existing constructor
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.def(py::init([](int n) { // custom constructor
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return std::make_unique<Example>(std::to_string(n));
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}));
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* Builtin support for converting C++17 standard library types and general
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conversion improvements:
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1. C++17 ``std::variant`` is supported right out of the box. C++11/14
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equivalents (e.g. ``boost::variant``) can also be added with a simple
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user-defined specialization. See :ref:`cpp17_container_casters` for details.
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`#811 <https://github.com/pybind/pybind11/pull/811>`_,
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`#845 <https://github.com/pybind/pybind11/pull/845>`_,
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`#989 <https://github.com/pybind/pybind11/pull/989>`_.
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2. Out-of-the-box support for C++17 ``std::string_view``.
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`#906 <https://github.com/pybind/pybind11/pull/906>`_.
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3. Improved compatibility of the builtin ``optional`` converter.
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`#874 <https://github.com/pybind/pybind11/pull/874>`_.
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4. The ``bool`` converter now accepts ``numpy.bool_`` and types which
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define ``__bool__`` (Python 3.x) or ``__nonzero__`` (Python 2.7).
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`#925 <https://github.com/pybind/pybind11/pull/925>`_.
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5. C++-to-Python casters are now more efficient and move elements out
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of rvalue containers whenever possible.
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`#851 <https://github.com/pybind/pybind11/pull/851>`_,
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`#936 <https://github.com/pybind/pybind11/pull/936>`_,
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`#938 <https://github.com/pybind/pybind11/pull/938>`_.
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6. Fixed ``bytes`` to ``std::string/char*`` conversion on Python 3.
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`#817 <https://github.com/pybind/pybind11/pull/817>`_.
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7. Fixed lifetime of temporary C++ objects created in Python-to-C++ conversions.
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`#924 <https://github.com/pybind/pybind11/pull/924>`_.
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* Scope guard call policy for RAII types, e.g. ``py::call_guard<py::gil_scoped_release>()``.
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See :ref:`call_policies` for details.
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`#740 <https://github.com/pybind/pybind11/pull/740>`_.
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* Improved handling of types and exceptions across module boundaries.
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`#915 <https://github.com/pybind/pybind11/pull/915>`_,
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`#951 <https://github.com/pybind/pybind11/pull/951>`_,
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`#995 <https://github.com/pybind/pybind11/pull/995>`_.
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* Fixed destruction order of ``py::keep_alive`` nurse/patient objects
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in reference cycles.
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`#856 <https://github.com/pybind/pybind11/pull/856>`_.
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* Numpy and buffer protocol related improvements:
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1. Support for negative strides in Python buffer objects/numpy arrays. This
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required changing integers from unsigned to signed for the related C++ APIs.
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Note: If you have compiler warnings enabled, you may notice some new conversion
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warnings after upgrading. These can be resolved with ``static_cast``.
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`#782 <https://github.com/pybind/pybind11/pull/782>`_.
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2. Support ``std::complex`` and arrays inside ``PYBIND11_NUMPY_DTYPE``.
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`#831 <https://github.com/pybind/pybind11/pull/831>`_,
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`#832 <https://github.com/pybind/pybind11/pull/832>`_.
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3. Support for constructing ``py::buffer_info`` and ``py::arrays`` using
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arbitrary containers or iterators instead of requiring a ``std::vector``.
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`#788 <https://github.com/pybind/pybind11/pull/788>`_,
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`#822 <https://github.com/pybind/pybind11/pull/822>`_,
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`#860 <https://github.com/pybind/pybind11/pull/860>`_.
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4. Explicitly check numpy version and require >= 1.7.0.
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`#819 <https://github.com/pybind/pybind11/pull/819>`_.
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* Support for allowing/prohibiting ``None`` for specific arguments and improved
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``None`` overload resolution order. See :ref:`none_arguments` for details.
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`#843 <https://github.com/pybind/pybind11/pull/843>`_.
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`#859 <https://github.com/pybind/pybind11/pull/859>`_.
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* Added ``py::exec()`` as a shortcut for ``py::eval<py::eval_statements>()``
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and support for C++11 raw string literals as input. See :ref:`eval`.
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`#766 <https://github.com/pybind/pybind11/pull/766>`_,
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`#827 <https://github.com/pybind/pybind11/pull/827>`_.
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* ``py::vectorize()`` ignores non-vectorizable arguments and supports
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member functions.
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`#762 <https://github.com/pybind/pybind11/pull/762>`_.
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* Support for bound methods as callbacks (``pybind11/functional.h``).
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`#815 <https://github.com/pybind/pybind11/pull/815>`_.
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* Allow aliasing pybind11 methods: ``cls.attr("foo") = cls.attr("bar")``.
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`#802 <https://github.com/pybind/pybind11/pull/802>`_.
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* Don't allow mixed static/non-static overloads.
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`#804 <https://github.com/pybind/pybind11/pull/804>`_.
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* Fixed overriding static properties in derived classes.
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`#784 <https://github.com/pybind/pybind11/pull/784>`_.
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* Improved deduction of member function of derived class when the bases
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isn't registered with pybind11.
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`#855 <https://github.com/pybind/pybind11/pull/855>`_.
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.. code-block:: cpp
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struct Base {
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int foo() { return 42; }
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}
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struct Derived : Base {}
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// Now works, but previously required also binding `Base`
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py::class_<Derived>(m, "Derived")
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.def("foo", &Derived::foo); // function is actually from `Base`
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* Fixed issues with multiple inheritance with offset base/derived pointers.
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`#812 <https://github.com/pybind/pybind11/pull/812>`_,
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`#866 <https://github.com/pybind/pybind11/pull/866>`_,
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`#960 <https://github.com/pybind/pybind11/pull/960>`_.
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* Improved support for the ``/std:c++14`` and ``/std:c++latest`` modes
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on MSVC 2017.
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`#841 <https://github.com/pybind/pybind11/pull/841>`_,
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`#999 <https://github.com/pybind/pybind11/pull/999>`_.
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* Fixed detection of private operator new on MSVC.
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`#893 <https://github.com/pybind/pybind11/pull/893>`_,
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`#918 <https://github.com/pybind/pybind11/pull/918>`_.
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* Intel C++ compiler compatibility fixes.
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`#937 <https://github.com/pybind/pybind11/pull/937>`_.
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* Fixed implicit conversion of `py::enum_` to integer types on Python 2.7.
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`#821 <https://github.com/pybind/pybind11/pull/821>`_.
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* Fixed ``__truediv__`` on Python 2 and ``__itruediv__`` on Python 3.
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`#867 <https://github.com/pybind/pybind11/pull/867>`_.
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* ``py::capsule`` objects now support the ``name`` attribute. This is useful
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for interfacing with ``scipy.LowLevelCallable``.
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`#902 <https://github.com/pybind/pybind11/pull/902>`_.
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* Fixed ``py::make_iterator``'s ``__next__()`` for past-the-end calls.
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`#897 <https://github.com/pybind/pybind11/pull/897>`_.
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* Added ``error_already_set::matches()`` for checking Python exceptions.
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`#772 <https://github.com/pybind/pybind11/pull/772>`_.
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* Deprecated ``py::error_already_set::clear()``. It's no longer needed
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following a simplification of the ``py::error_already_set`` class.
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`#954 <https://github.com/pybind/pybind11/pull/954>`_.
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* Deprecated ``py::handle::operator==()`` in favor of ``py::handle::is()``
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`#825 <https://github.com/pybind/pybind11/pull/825>`_.
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* Deprecated ``py::object::borrowed``/``py::object::stolen``.
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Use ``py::object::borrowed_t{}``/``py::object::stolen_t{}`` instead.
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`#771 <https://github.com/pybind/pybind11/pull/771>`_.
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* Additional compile-time and run-time error checking and more informative messages.
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`#786 <https://github.com/pybind/pybind11/pull/786>`_,
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`#794 <https://github.com/pybind/pybind11/pull/794>`_,
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`#803 <https://github.com/pybind/pybind11/pull/803>`_.
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* Various minor improvements and fixes.
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`#764 <https://github.com/pybind/pybind11/pull/764>`_,
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`#791 <https://github.com/pybind/pybind11/pull/791>`_,
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`#795 <https://github.com/pybind/pybind11/pull/795>`_,
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`#840 <https://github.com/pybind/pybind11/pull/840>`_,
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`#844 <https://github.com/pybind/pybind11/pull/844>`_,
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`#846 <https://github.com/pybind/pybind11/pull/846>`_,
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`#849 <https://github.com/pybind/pybind11/pull/849>`_,
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`#858 <https://github.com/pybind/pybind11/pull/858>`_,
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`#862 <https://github.com/pybind/pybind11/pull/862>`_,
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`#871 <https://github.com/pybind/pybind11/pull/871>`_,
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`#872 <https://github.com/pybind/pybind11/pull/872>`_,
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`#881 <https://github.com/pybind/pybind11/pull/881>`_,
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`#888 <https://github.com/pybind/pybind11/pull/888>`_,
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`#899 <https://github.com/pybind/pybind11/pull/899>`_,
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`#928 <https://github.com/pybind/pybind11/pull/928>`_,
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`#931 <https://github.com/pybind/pybind11/pull/931>`_,
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`#944 <https://github.com/pybind/pybind11/pull/944>`_,
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`#950 <https://github.com/pybind/pybind11/pull/950>`_,
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`#952 <https://github.com/pybind/pybind11/pull/952>`_,
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`#962 <https://github.com/pybind/pybind11/pull/962>`_,
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`#965 <https://github.com/pybind/pybind11/pull/965>`_,
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`#970 <https://github.com/pybind/pybind11/pull/970>`_,
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`#979 <https://github.com/pybind/pybind11/pull/979>`_,
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`#978 <https://github.com/pybind/pybind11/pull/978>`_,
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`#986 <https://github.com/pybind/pybind11/pull/986>`_.
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* Testing improvements.
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`#798 <https://github.com/pybind/pybind11/pull/798>`_,
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`#882 <https://github.com/pybind/pybind11/pull/882>`_,
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`#898 <https://github.com/pybind/pybind11/pull/898>`_,
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`#900 <https://github.com/pybind/pybind11/pull/900>`_,
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`#921 <https://github.com/pybind/pybind11/pull/921>`_,
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`#923 <https://github.com/pybind/pybind11/pull/923>`_,
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`#963 <https://github.com/pybind/pybind11/pull/963>`_.
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v2.1.1 (April 7, 2017)
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-----------------------------------------------------
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@ -9,6 +9,8 @@
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Reference
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#########
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.. _macros:
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Macros
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======
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