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JsonLogic for C++

This is an implementation for JsonLogic for C++. The API uses the Boost JSON implementation (e.g., Boost 1.82).

The library is designed to follow the type conversion rules of the reference JsonLogic implementation.

Compile and Install

The library can be installed using cmake.

mkdir build
cd build
cmake ..
make

Use

The simplest way is to create Json rule and data options and call jsonlogic::apply.

#include <jsonlogic/logic.hpp>

boost::json::value rule = ..;
boost::json::value data = ..;
jsonlogic::any_expr res = jsonlogic::apply(rule, data);
std::cout << res << std::endl;

See examples/testeval.cc for the complete sample code.

To evaluate a rule multiple times, it may be beneficial to convert the Json object into JsonLogic's internal expression representation.

#include <jsonlogic/logic.hpp>

boost::json::value rule = ..;
std::vector<boost::json::value> massdata = ..;
jsonlogic::create_logic logic = jsonlogic::create_logic(rule, data);

for (boost::json::value data : massdata)
{
    jsonlogic::variable_accessor varlookup = jsonlogic::data_accessor(std::move(data));

    std::cout << jsonlogic.apply(logic.syntax_tree(), std::move(varlookup)) << std::endl;
}

Python Companion

Clippy is a companion library for Python that creates Json objects that can be evaluated by JsonLogic.

Authors

Peter Pirkelbauer (pirkelbauer2 at llnl dot gov)

License

CLIPPy is distributed under the MIT license.

See LICENSE-MIT, NOTICE, and COPYRIGHT for details.

SPDX-License-Identifier: MIT

Release

LLNL-CODE-818157