Py2Cpp

Metaprogramming serving Py->C++ and C++->Py

This library makes it easy to convert Python objects (Python C API) to standard C++ datatypes. It is based on a single header file that uses templates and variadic templates in order to perform the conversions. It requires C++11 or superior.

How to use it?

Python objects towards C++ instances

Basic usages: std datatypes

The file src/py2cpp.hpp defines the functor CppBuilder<T>, which is responsible to build the corresponding C++ element of a given PyObject instance automatically. A same functor can be use for several PyObject.

For the moment, the conversion from Python to C++ can generate combinations of the following datatypes:

• PyObject*
• bool
• int and unsigned int
• long and unsigned long
• long long and unsigned long long
• double
• std::string and std::wstring
• std::map -- from dict
• std::set -- from set
• std::tuple -- from tuple
• std::vector -- from list

Converting a PyObject* to a C++ element is as simple as: T my_cpp_elt { CppBuilder<T>()(py_object) }; where T should be replace by the conjonction of datatypes you want.

For instance, if a PyObject* contains a dict(tuple(int,int,double),list(int)), you can easily convert it into C++ datatypes by using:

auto out { CppBuilder<std::map<std::tuple<int,int,double>,std::vector<int>>>()(py_object) };

More advance usages: fill your own struct/class

To describe...