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Initial commit of Splash, a programming language aimed at kids. This was all done over the course of a 2 hour bus ride, and is currently only half working. Feel free to browse, keep checking back for a fully working build (scripts currently compile but do nothing in the browser)

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Ryan McGrath 2010-07-06 11:11:58 -04:00
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/* Parser for Splash, an attempt at a programming language for kids.
*
* @Author: Ryan McGrath
* @Requires:
* Node.js (Run latest for safety ;P)
* line_reader.js (custom, supplied in libraries)
* wrench.js (custom, supplied in libraries
*
* @Note: This is just a compiler/parser. Core Splash takes place inside the browser - no need
* to muck around in DOM logic here when it's readily available over there. ;P
*/
/* If no file was passed in, instruct them to do so. */
if(!process.ARGV[2]) sys.puts('\nPlease provide a filename as an argument!\n');
var sys = require('sys'),
fs = require('fs'),
wrench = require('./libraries/wrench'),
line = require('./libraries/line_reader'),
definitions = require('./libraries/definitions'), /* Mapping of splash ~> JS commands */
expr = new line.reader(process.ARGV[2]),
creatingBlock = false,
stripper = /explain|noun|verb/,
whitespace = /^\s+|\s+$|/g,
block = {},
finalRep = [];
var determineAttrName = function(str) { return str.replace(whitespace, '').split(':')[0]; };
var determineVal = function(str) { return str.replace(whitespace, '').split(':')[1]; };
var getType = function(str) {
if(/verb/.test(str)) return "verb";
/* Nouns are essentially a generic fallback type. */
return "noun";
};
exports.writeApp = function(text) {
/* This gets passed to Splash and evaluated in the browser, since we want the DOM. */
var finalJSON = "[" + finalRep.join(',') + "]",
appName = process.ARGV[2].replace(".splash", ""),
currPath = process.cwd();
/* Very messy for the time being, as I'm just doing a proof of concept. Requires you to be
* one directory up from this file for execution.
*/
wrench.copyDirSyncRecursive(currPath + '/lib/app_base', currPath + '/' + appName);
fs.writeFileSync(currPath + "/" + appName + "/scripts/compiled.js", "function main() { game_on(" + finalJSON + "); };", encoding="utf8");
};
/* In Splash, explanations are essentially variable declarations,
* but formulated like simple vocabulary definitions for kids.
*
* Note: This could also prove useful in teaching people English.
*
* e.g:
* verb run:
* who: daniel
* action: move
* direction: left
* done
*
* @Note: This parse is currently very "top down", and not as forgiving as it should be.
*/
while(expr.hasNextLine()) {
var currLine = expr.getNextLine(),
isBeginning = stripper.test(currLine);
if(creatingBlock || isBeginning) {
creatingBlock = /end/.test(currLine) ? false : true;
if(isBeginning) block["type"] = getType(currLine);
if(isBeginning) block["name"] = currLine.replace(stripper, '').replace(whitespace, '');
else block[determineAttrName(currLine)] = determineVal(currLine);
if(!creatingBlock) {
finalRep.push(JSON.stringify(block)); //this.parseExplain(block);
block = {};
}
}
}
try {
this.writeApp();
} catch(error) {
sys.puts(error);
}