# Fun Documentation Index

This file serves as an index of the documents in this directory. Links are relative and can be opened directly on Git hosting or locally.

## Overview

- [handbook.md](./handbook.md) — Comprehensive handbook for the Fun language and VM: install/build, configuration flags, usage, and full feature overview.
- [types.md](./types.md) — Core types (numbers, strings, arrays, maps, nil/bool), common operations, patterns, and interop notes.
- [numbers.md](./numbers.md) — Working with integers and floats: arithmetic, conversions, clamping, bitwise ops, and patterns.
- [strings.md](./strings.md) — Working with strings: literals/escaping, concatenation, substr/find, split, and conversions.
- [arrays.md](./arrays.md) — Working with arrays: creation, indexing/slicing, iteration patterns, helpers, and idioms.
- [maps.md](./maps.md) — Working with maps: construction, lookup/update, merging, iteration, and common patterns.
- [includes.md](./includes.md) — Using local vs. system includes, FUN_LIB_DIR, DEFAULT_LIB_DIR, and namespaced includes with `as`.
- [repl.md](./repl.md) — REPL guide: how to build/launch, editing and history, completions, REPL‑on‑error, and tips.
- [opcodes.md](./opcodes.md) — VM opcodes overview grouped by domain with brief behavior/stack notes.
- [internals.md](./internals.md) — Implementation details: bytecode format, VM architecture, stacks/frames, parser, and dispatch.
- [rust.md](./rust.md) — Writing Rust‑backed opcodes and wiring them into the C VM; build/setup notes.
- [examples.md](./examples.md) — How to run the examples and the interactive showcase script, with environment tips.
- [testing.md](./testing.md) — How to build and run tests/targets with CMake/CTest, and where to add new tests.
- [troubleshooting.md](./troubleshooting.md) — Common issues and quick fixes for build, includes, and REPL usage.

## New and supplemental guides

- [build.md](./build.md) — How to build Fun with CMake, available targets, and build options (FUN_DEBUG, FUN_USE_MUSL, FUN_WITH_CPP, FUN_WITH_RUST).
- [cli.md](./cli.md) — Command‑line usage of the `fun` executable: synopsis, options, exit codes, includes and library paths.
- [contributing.md](./contributing.md) — How to contribute: project structure, coding style, running tests, and PR guidelines.
- [style-guide.md](./style-guide.md) — Coding conventions for C and Fun (indentation, naming, idioms).
- [stdlib.md](./stdlib.md) — Overview of the standard library modules under ./lib with one‑line summaries.
- [embedding.md](./embedding.md) — Embedding the VM from C/Rust, lifecycle, and host integration tips.
- [errors-and-diagnostics.md](./errors-and-diagnostics.md) — Understanding parser/runtime errors and enabling diagnostics.
- [performance.md](./performance.md) — Build/runtime tuning tips and patterns for better performance.
- [security-and-sandboxing.md](./security-and-sandboxing.md) — Trust boundaries, I/O expectations, and capability restrictions.
- [faq.md](./faq.md) — Frequently asked questions and quick answers.
- [writing-tests.md](./writing-tests.md) — How to author new tests for Fun and opcode components.
- [bytecode-format.md](./bytecode-format.md) — Reference for the bytecode format (split out from internals for convenience).
- [roadmap.md](./roadmap.md) — High‑level direction, planned features, and pointers to issues.

## Tips

- When building from the repo without installing, set `FUN_LIB_DIR` to the local `./lib` directory so examples and the REPL can locate the stdlib.
- For a broader project overview and quickstart, see the repository root [README.md](../README.md).