Update std.js

lib/std.js

@@ -449,6 +449,112 @@ AsyncFunction.bind = function(exports, args) {
     return result;
 };
 
+function GeneratorFunction(f, callback) {
+    this._f = f;
+    this._callback = callback;
+    this._nextState = 0;
+    this._state = 0;
+    this._value = undefined;
+    this._done = false;
+    this._yield = function(value) {
+        if (this._nextState < this._state) {
+            throw new ReferenceError("CONTINUE");
+        } else {
+            this._value = value;
+            this._state++;
+            throw new ReferenceError("BREAK");
+        }
+        throw new RangeError("OUT OF RANGE");
+    };
+
+    this.next = function() {
+        this._nextState = 0;
+
+        var go = true;
+        while (go) {
+            try {
+                this._f(this._yield);
+            } catch (e) {
+                go = (e.message == "CONTINUE");
+                this._nextState++;
+            }
+        }
+
+        this._done = (typeof this._callback !== "undefined" ? this._callback(this) : false);
+
+        return {
+            value: this._value,
+            done: this._done
+        };
+    };
+
+    this['return'] = function() {
+        // Not implemented
+    };
+
+    this['throw'] = function() {
+        // Not implemented
+    };
+}
+
+function GeneratorFunction(f, callback) {
+    this._f = f;
+    this._callback = callback;
+    this._nextState = 0;
+    this._state = 0;
+    this._value = undefined;
+    this._done = false;
+    this._yield = function(value) {
+        if (this._nextState < this._state) {
+            throw new ReferenceError("CONTINUE");
+        } else {
+            this._value = value;
+            this._state++;
+            throw new ReferenceError("BREAK");
+        }
+        throw new RangeError("OUT OF RANGE");
+    };
+
+    this.next = function() {
+        this._nextState = 0;
+
+        var go = true;
+        while (go) {
+            try {
+                this._f(this._yield);
+            } catch (e) {
+                go = (e.message == "CONTINUE");
+                this._nextState++;
+            }
+        }
+        
+        this._done = (typeof this._callback !== "undefined" ? this._callback(this) : false);
+
+        return {
+            value: this._value,
+            done: this._done
+        };
+    };
+
+    this['return'] = function() {
+        // Not implemented
+    };
+
+    this['throw'] = function() {
+        // Not implemented
+    };
+}
+
+/*
+new GeneratorFunction(function(yield) {
+    yield(1);
+    yield(2);
+    yield(3);
+}, function(generator) {
+	return generator._value == 3;
+});
+*/
+
 global.GetResource = GetResource;
 global.sleep = sleep;
 global.repeat = repeat;