Modern C++ LLSD Library (llsd_modern.hpp)

This is a standalone, header-only C++17 library for serializing and deserializing Linden Lab Structured Data (LLSD).

It is designed to be:

• Type-Safe: Uses std::variant for data storage.
• Modern: Uses C++17 features like std::string_view and std::optional.
• Lightweight: Depends only on a header-only JSON library (nlohmann/json).
• Standalone: Has no dependencies on the legacy Second Life viewer codebase.

Implementation Note

This library is a new C++ implementation, but its design and parsing/formatting logic are directly inspired by and derived from the official python-llsd library by Linden Lab, Inc. The goal of this library is to provide a modern, robust C++ equivalent to the Python reference implementation, which can then be used to back-end other legacy APIs.

Licensing

This new C++ library is licensed under the MIT License (see LICENSE).

The original python-llsd library, from which this work is derived, is also licensed under the MIT License (see LICENSE.python-llsd).