crab

README

crab 🦀

An interpreted dynamically typed toy programming language.

Documentation

Installation

Prerequisites

• Go 1.18+

macOS/Linux

curl https://raw.githubusercontent.com/Bananenpro/crab/main/install.sh | bash

To update crab simply run the above command again.

Windows

Run the following command as Administrator:

go install github.com/Bananenpro/crab@latest

To update crab simply run the above command again.

Compiling manually

git clone https://github.com/Bananenpro/crab.git
cd crab
go build .

Hello World

func main() {
    println("Hello World!");
}

crab helloworld.cb

Features

• dynamic typing
• helpful error messages
• scopes and variable shadowing
• lists
• control flow statements
• ternary conditional
• functions
• multiple return values
• functions as values / closures
• exceptions
• useful builtin functions

Editor support

• vim-crab: syntax and indent files for crab in vim
• vscode-crab: syntax highlighting in VS Code

License

MIT License

Copyright (c) 2022 Julian Hofmann

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.