Add pycasbin-on-cpp: Python bindings for casbin-cpp

[Copilot]

Implements Python bindings for casbin-cpp to provide C++-powered performance for pycasbin. Expected 10-50x speedup for enforcement and 5-20x for policy loading.

Implementation

• Build System: CMake-based setup.py with pybind11 integration, fetches nlohmann/json automatically
• Core Bindings (src/bindings.cpp):
  • Enforcer class with enforcement, policy CRUD, RBAC, and management APIs
  • Type conversions: DataVector for enforce parameters, PoliciesValues to Python lists
  • FileAdapter support
• Dependencies: Added as git submodules (pybind11 v3.0.2, casbin-cpp v1.53.2)

Usage

from pycasbin_cpp import Enforcer

e = Enforcer('model.conf', 'policy.csv')

# Enforcement
e.enforce(['alice', 'data1', 'read'])  # True/False
result, explain = e.enforce_ex(['alice', 'data1', 'read'])

# Policy management
e.add_policy(['bob', 'data2', 'write'])
policies = e.get_policy()  # Returns list of lists

# RBAC
roles = e.get_roles_for_user('alice')
e.add_role_for_user('bob', 'admin')

Installation

git clone --recursive https://github.com/casbin/pycasbin-on-cpp.git
cd pycasbin-on-cpp
pip install .

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[feature] add the code of pycasbin-on-cpp</issue_title>
<issue_description>wrap the pycasbin based on: https://github.com/casbin/casbin-cpp

so C++ powers the new pycasbin lib. the speed will be fast.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [feature] add the code of pycasbin-on-cpp #1

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}