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Quickly test Rust code on macOS
Branch: master
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cmyr Use cargo workspace
This also does some general build system cleanup.
Latest commit 074b820 May 9, 2019
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RustPlayground Use cargo workspace May 8, 2019
playground-utils-ffi Version bumps May 8, 2019
playground-utils Version bumps May 8, 2019
xi-ffi Leak less memory Apr 14, 2019
xi-modal-input Cleanup Apr 25, 2019
.gitignore Use cargo workspace May 8, 2019
Cargo.toml Use cargo workspace May 8, 2019
LICENSE Add readme, license Apr 25, 2019 Version bumps May 8, 2019

Rust Playground for MacOS

status: experimental / pre-release / guaranteed buggy

The Rust Playground for MacOS is a standalone native mac application that allows quickly editing and testing rust snippets.

Rust Playground Screenshot


You can download a disk image of a recent build on the releases page.


The playground requires rustup, and allows code to be run with any installed toolchain. note: Rustup must currently be in the default directory, $HOME/.rustup.

install from source (requires Xcode)

  • clone this repository
  • cd in to the RustPlayground directory
  • run xcodebuild from the command line
  • copy build/Release/Rust to your Applications directory


This project is based on a fork of the xi-editor core. It is intended largely as an experimental offshoot of xi; a narrowly scoped editor frontend that can be used to experiment with various design decisions.

Document state is handled in rust; the swift frontend interfaces with the rust code via FFI.


  • syntax highlighting
  • font selection
  • auto-indent
  • comment toggling
  • line breaking
  • extern crates (with a hacky custom syntax for declaring imports)
  • use any installed toolchains

Known issues

  • Performance is not great; it is expected that documents are only ever a few hundred lines.
  • Drawing is hacky. We may draw ghost selections.


  • export to gist / web playground
  • export to new cargo project?
  • rustfmt / clippy
  • multiple documents, saving snippets?
  • ASM / IR output

One day, maybe


to the xi-editor contributors, to Jake Goulding for the excellent implementation, and to the Rust community at large.

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