jison

I think the (not maintained, I presume from the activity) jison[0] project was trying to achieve was auto generating a parser in JavaScript based on a similar idea. [0] https://github.com/zaach/jison

Compiling a single language into JavaScript source code as well as C or C++ is going to be one hell of a trick. I think it'll be very difficult to keep the semantics the same, without resorting to running the equivalent of a JavaScript interpreter inside of your C++, but I wish you the best of luck with it. If you'd like to discuss the implementation, feel free to drop by #coffeescript on freenode. But to give you the rough outline -- the compiler is made up of (in order), a Lexer, Rewriter, Parser, and AST of Nodes. The lexer creates the tokens, the rewriter rewrites the stream of tokens, disambiguating parses and allowing for optional syntax, the parser generates the AST of nodes, and then "compile()" is called on the root node, and walks down the tree, compiling the JavaScript string recursively. For the parser, I'm using the excellent