A multi-platform programming language focused on maintainability and bug prevention
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Mango is a programming language that is currently in development. It focuses on maintainability and bug prevention.



This project is still in early development stage. It is not ready to use, not even experimentally.

There are dozens of pages of design notes, but the plan still lacks coherence, so is unpublished.

How to use

The compiler is not complete yet and cannot be used for real code.

But if you want to play with it, or even help to complete it, here is how!

These instructions were tested on Ubuntu 18.4 (using Bash). It should also work on other platforms, if you 'translate' the commands.

  • You will need pkg-config, libssl-dev, git and some way to run commands. Python is optional.
  • Get the code with (something like).
git clone https://github.com/mangolang/compiler.git mango
cd mango  # choose the directory that you downloaded the code to
# After this, I'll assume $PWD is the location of `mango`.
  • The compiler is written in Rust. If you don't have rustup yet, install it with instructions on this page. Then
rustup toolchain install nightly
rustup override set nightly  # make sure you are in the mango directory
rustup target add wasm32-unknown-unknown --toolchain nightly
  • We need a few packages:
    rustup component add rustfmt-preview
cargo install wasm-bindgen-cli
  • There are git commit hooks that you can use. They test that code is formatted well and compiles and commit messages are correctly formatted. You don't have to use them if you ensure these things yourself. If you want to use them:
git config core.hooksPath $PWD/dev/hooks/
# on git versions older than 2.9, use (from mango directory):
rm -rf .git/hooks
ln -s $PWD/dev/hooks/ .git/hooks
chmod u+x .git/hooks
  • The first build will be slow due to downloading and compiling dependencies. To format the code, test it, and launch the command line interface:
      cargo +nightly fmt
      cargo test --all
      cargo run --bin mango-cli

or to build a fast, release-mode native binary:
RUSTFLAGS="-C target-cpu=native" cargo build --release
  • To deploy the web version in release mode, run the script dev/build_web.sh (or view it for the steps needed). It uses Python's SimpleHTTPServer, if you don't have that, you can still find the deployable code in target/deploy.
  • You're now ready to make changes! If you want to help, you're very welcome! Have a glance at CONTRIBUTING.rst if you have a minute.
  • For IDEs, Rust support isn't on the level of e.g. Java yet, but JetBrain's CLion with Rust plugin is not bad if you have a license.