WIP: PyPy support (#527)
This commit includes modifications that are needed to get pybind11 to work with PyPy. The full test suite compiles and runs except for a last few functions that are commented out (due to problems in PyPy that were reported on the PyPy bugtracker).
Two somewhat intrusive changes were needed to make it possible: two new tags ``py::buffer_protocol()`` and ``py::metaclass()`` must now be specified to the ``class_`` constructor if the class uses the buffer protocol and/or requires a metaclass (e.g. for static properties).
Note that this is only for the PyPy version based on Python 2.7 for now. When the PyPy 3.x has caught up in terms of cpyext compliance, a PyPy 3.x patch will follow.
diff --git a/docs/intro.rst b/docs/intro.rst
index 429a01c..f22eeed 100644
--- a/docs/intro.rst
+++ b/docs/intro.rst
@@ -51,6 +51,9 @@
*******
In addition to the core functionality, pybind11 provides some extra goodies:
+- Python 2.7, 3.x, and PyPy (PyPy2.7 >= 5.5) are supported with an
+ implementation-agnostic interface.
+
- It is possible to bind C++11 lambda functions with captured variables. The
lambda capture data is stored inside the resulting Python function object.