An implementation of 61A Scheme in Dart, designed for use both in the Dart VM and on the web.
web directory includes a web REPL that is currently deployed at
This package includes three interpreter libraries: core, extra, and web.
The core library includes only enough functionality to match the Python implementation (plus a few pieces of UI code). The extra library includes everything in the core library, plus asynchronous expressions, diagramming, visualization, and tracing. The web library includes everything in the extra library, plus a renderer for diagrams, JS interop, themes, turtle graphics, and support for importing files from a URL.
You can import an interpreter library with one of the following lines:
import 'package:cs61a_scheme/cs61a_scheme.dart'; import 'package:cs61a_scheme/cs61a_scheme_extra.dart'; import 'package:cs61a_scheme/cs61a_scheme_web.dart';
You only need to import one. The web library depends on
dart:html, but the
other two can be used in both the browser and the Dart VM.
This implementation is not complete. To run the interpreter, you must
lib/src/core/project_interface.dart). You can
skip implementing certain optional pieces of the interpreter by adding the other
classes in that file as mixins.
61A staff members can use our private staff implementation of
in the dart_scheme_impl repo of our org. A skeleton of this implementation is
available publicly here. We ask that you do not publicly distribute
the source code for a
Additionally, if you are a Berkeley student, publicly distributing an
ProjectInterface constitutes academic dishonesty as
described in our course policies, as the implementation is close
enough to the Scheme project's to be considered distribution of solutions,
despite the change of language from Python to Dart. This applies even if you are
not currently taking 61A.
See CONTRIBUTING.md for instructions.
Travis should be set up to automatically deploy to scheme.cs61a.org whenever
tests successfully pass on master. To deploy manually, add a remote
pointing to the 61A Dokku server and run