An interpreter for the Grace programming language

grace, language, interpreter
npm install hopper@0.2.0



A simple JavaScript AST-walking interpreter for the Grace programming language.


hopper [FILENAME]

Accepts an optional source file as an argument. If left off, the interactive REPL will load instead. Use the -h flag for information about extra arguments.


var hopper = require("hopper");

hopper.interpret(grace, callback);

The interpret method accepts Grace code as a string, and a Node style callback.

In order to interpret multiple chunks of code with preserved state, construct a new Interpreter and invoke interpret on that instead.

You can also directly load and interpret an external module.

hopper.load(path, callback);

Module resolution is controlled by an optional module loader argument, with a default that uses the Node.js file system interface.


Copyright (C) 2014-2015 Timothy Jones

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/gpl.