/
parse.js
32 lines (30 loc) · 1.2 KB
/
parse.js
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define(['ometa', 'q', 'text!hmmgram.ometa'], function(ometa, Q, hmmgram) {
var deferred = Q.defer();
ometa.createParser(hmmgram, function(error, success) {
if (error) {
console.error("Couldn't parse HMM grammar.", error.inner);
deferred.reject(error.inner);
} else {
// tweak success.parse so it also returns a promise.
var parse = success.parse;
deferred.resolve(function (input, rule) {
var deferred2 = Q.defer();
try { // workaround poor error handling in ometajs callback
parse(input, rule, function(error, success) {
if (error) {
console.error("Couldn't parse.", error.inner);
deferred2.reject(error);
} else {
deferred2.resolve(success);
}
});
} catch (ex) {
console.error("Couldn't parse.", ex.errorPos);
deferred2.reject(ex);
}
return deferred2.promise;
});
}
});
return deferred.promise;
});