What are Iso Subspaces in this context?

Iso Subspaces are used for memory isolation and garbage collection. They are required for C++ classes that contain custom fields to ensure the JSC garbage collector handles them correctly.

What is the primary purpose of this skill?

This skill provides the specific architectural patterns and C++ boilerplate required to implement JavaScript classes directly in C++ using the JavaScriptCore (JSC) engine, particularly for use in the Bun ecosystem.

How does this skill handle JavaScript properties?

It uses HashTableValue arrays to define getters, setters, and functions, which are then reified into the object's prototype using JSC host function macros.

Is this applicable to any C++ project?

While the core JSC concepts are universal, the specific caching and global object patterns provided are optimized for projects using the Bun runtime architecture and Zig integration.

JSC C++ Class Implementation

Name: JSC C++ Class Implementation
Author: xhochy

byxhochy

0•

Developer Tools

Provides standardized patterns and boilerplate for implementing JavaScript classes in C++ using the JavaScriptCore engine.

This skill provides a comprehensive framework for binding C++ logic to JavaScript classes within the JavaScriptCore (JSC) environment, specifically tailored for the Bun runtime. It guides developers through the complex process of defining class structures, prototypes, and constructors while ensuring proper memory management through Iso Subspaces. By utilizing these standardized implementation patterns, developers can efficiently create high-performance native extensions, manage custom property accessors, and correctly expose C++ functionality to both JavaScript and Zig layers.

Key Features

01Automated property definitions using HashTableValue for getters, setters, and methods

02Integration patterns for structure caching within ZigGlobalObject

030 GitHub stars

04Memory management configuration using Iso Subspaces for custom C++ fields

05Type-safe C++ to JS conversion and binding exposure to external layers

06Standardized boilerplate for JSC::DestructibleObject, Prototype, and Constructor classes

Use Cases

01Optimizing JS-to-C++ bindings for reduced overhead in runtime environments

02Bridging complex C++ data structures with JavaScript objects in a memory-safe manner

03Developing high-performance native modules and extensions for the Bun runtime

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add xhochy/bun-1.3.7 implementing-jsc-classes-cpp

For use in Claude.ai and ChatGPT

Download Skill