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https://github.com/samsonjs/elisp.js.git
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70 lines
2.4 KiB
Text
70 lines
2.4 KiB
Text
Emacs Lisp implementation in JavaScript.
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Copyright (c) 2009 Sami Samhuri - sami.samhuri@gmail.com
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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Introduction
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(or "You must be kidding")
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==========================
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I'm not 100% sure why I think this might be useful to somebody. The
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idea of editing code directly on github or bitbucket in a web browser
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is pretty cool though, and if you're going to do such a thing why not
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use the best tools available. IMO those tools are written in Emacs
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Lisp so I would like to use them in the browser. Maybe with some
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HTML5 offline goodness thrown in.
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Seeing Ymacs[1] in action[2] was also an inspiration to start this
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project as I've had it on my TODO list for several months now. Emacs
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in the browser could be a reality; Ymacs is proof.
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[1] http://www.ymacs.org/
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[2] http://www.ymacs.org/demo/
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What's here?
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============
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Not much compared to the real thing but it's a decent start for < 1000
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lines.
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* parser
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(ints, floats, strings, symbols, lists, quoted expressions)
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* symbol table
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(functions & variables separate)
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* lexical scope
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* expression evaluator
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* simple tagged primitive types
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(string, symbol, primitive, function, number)
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* special forms for defvar, defun, set, setq, and quote
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* eval/apply for atoms, function calls, and a few special forms
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* a few primitive math ops
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(thanks to JS' overloading + works on strings too)
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* 2 horrible print functions
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(JS "pretty" printer & a half-assed Lisp print)
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