4bc599966f
Reviewers: xymostech Reviewed By: xymostech Differential Revision: http://phabricator.benalpert.com/D38
32 lines
761 B
JavaScript
32 lines
761 B
JavaScript
var ebnfParser = require("ebnf-parser");
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var jison = require("jison");
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var through = require("through");
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module.exports = function(file) {
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if (!(/\.jison$/).test(file)) {
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return through();
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}
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var data = '';
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return through(write, end);
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function write(buf) {
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data += buf;
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}
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function end() {
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try {
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var grammar = ebnfParser.parse(data);
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var parser = new jison.Parser(grammar);
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var js = parser.generate({moduleType: "js"});
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js += "\nmodule.exports = parser;";
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this.queue(js);
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this.queue(null);
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} catch (e) {
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// TODO(alpert): Does this do anything? (Is it useful?)
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this.emit("error", e);
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}
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}
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};
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