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Transpiler.js
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Transpiler.js
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var jison = require('jison');
var path = require('path');
var fs = require('fs');
var sourceMap = require('source-map'),
SourceNode = sourceMap.SourceNode;
var withSourceMaps = function(nodes, fileName) {
var preamble = new SourceNode(null, null, null, '')
.add('(function() {\n "use strict";\n');
var codes = nodes.forEach(function(expr) {
preamble.add(expr.compile(1, fileName));
});
var postscript = new SourceNode(null, null, null, '')
.add('}());');
preamble.add(postscript);
return preamble;
};
var transpile = function(source, fileName) {
var bnf = fs.readFileSync(path.join(__dirname, './arnoldc.jison'), 'utf-8');
var parser = new jison.Parser(bnf);
parser.yy = require('./ast');
var AST = parser.parse(source);
var mapping = withSourceMaps(AST, fileName);
mapping.setSourceContent(fileName, source);
return mapping;
};
module.exports.transpile = transpile;
module.exports.withSourceMaps = withSourceMaps;