https://github.com/ffwff/hana

🌸 a simple scripting language (alpha) 🌸
https://github.com/ffwff/hana

bytecode-interpreter programming-language scripting-language

Last synced: 3 months ago
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🌸 a simple scripting language (alpha) 🌸

• Host: GitHub
• URL: https://github.com/ffwff/hana
• Owner: ffwff
• License: gpl-3.0
• Archived: true
• Created: 2019-01-24T11:53:17.000Z (almost 6 years ago)
• Default Branch: haru
• Last Pushed: 2019-06-24T03:14:34.000Z (over 5 years ago)
• Last Synced: 2024-07-09T18:46:33.022Z (4 months ago)
• Topics: bytecode-interpreter, programming-language, scripting-language
• Language: Rust
• Homepage:
• Size: 1.08 MB
• Stars: 133
• Watchers: 6
• Forks: 7
• Open Issues: 9
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# 🌸 hana

[![travis](https://travis-ci.org/ffwff/hana.svg?branch=haru)](https://travis-ci.org/ffwff/hana)

[![codecov](https://codecov.io/gh/ffwff/hana/branch/haru/graph/badge.svg)](https://codecov.io/gh/ffwff/hana)

[![Gitter](https://badges.gitter.im/flowers-of-spring/community.svg)](https://gitter.im/flowers-of-spring/community)

**hana** is a small dynamically-typed scripting language written in Rust/C

and is inspired by Pascal, Ruby and Javascript. It primarily supports prototype-based

object orientation, dynamic arrays, first-class functions (with closure support). The interpreter

comes useful features such as a simple mark-and-sweep garbage collector, exception handling

and an import system.

**haru**, the Rust parser/runtime generates bytecode that runs on an optimised

virtual machine written in C (about as fast as Python and Ruby!)

## Installation

You'll need to have the cargo package manager and rust installed. You can then do:

```

cargo install haru

```

The interpreter called `haru` will be installed into your PATH.

### Additional features

Additional features can be enabled by passing their names into

cargo's `--features` flag:

* `jemalloc`: use the jemalloc memory allocator

* `cffi`: enables the stdlib's C foreign interface *(wip)*

## Running

Once built or installed, you can write hana code into a source file, then invoke the interpreter like this:

```

haru program.hana

```

Alternatively you could invoke a REPL for easier prototyping:

```

haru

```

For usage, pass the `-h` command:

```

usage: haru [options] [-c cmd | file | -]

options:

 -c cmd : execute program passed in as string

 -d/--dump-vmcode: dumps vm bytecode to stdout

                   (only works in interpreter mode)

 -b/--bytecode: runs file as bytecode

 -a/--print-ast: prints ast and without run

 -v/--version: version

```

## Examples

*see [/examples](https://github.com/ffwff/hana/tree/haru/examples) for more*

### Hello World

```

print("Hello World\n")

```

### Variables

```

name = "Alice"

age = 20

print(name, " is ", age, " years old.\n")

```

### Fibonacci numbers

```

// Regular recursive

fib(n) = n <= 1 ? 1 : fib(n-1) + fib(n-2)

print(fib(30), "\n")

// Faster recursive (with tail-call optimization!)

fibrec(n, prev, curr) = n <= 0 ? curr : fibrec(n-1, prev+curr, prev)

fib(n) = fibrec(n+1, 1, 0)

print(fib(50), "\n")

```

## Documentation

*see [DOCUMENTATION.md](https://github.com/ffwff/hana/blob/haru/DOCUMENTATION.md)*

## Building

(building was tested by using rust-nightly and gcc-4.8 on an x64 with Linux, mileage

may vary on other architectures)

Just do:

```

cargo build --release

```

## License

GPLv3 License