feat(transpiler): add support for getters

tools/transpiler/spec/classes_spec.js

@@ -1,4 +1,4 @@
-import {describe, it, expect} from 'test_lib/test_lib';
+import {ddescribe, describe, it, expect} from 'test_lib/test_lib';
 import {CONST} from './fixtures/annotations';
 
 // Constructor
@@ -36,6 +36,16 @@ class SubConst extends Const {
   }
 }
 
+class HasGetters {
+  get getter():string {
+    return 'getter';
+  }
+
+  static get staticGetter():string {
+    return 'getter';
+  }
+}
+
 export function main() {
   describe('classes', function() {
     it('should work', function() {
@@ -60,6 +70,17 @@ export function main() {
         expect(subFoo.c).toBe(3);
       });
     });
+
+    describe("getters", function () {
+      it("should call instance getters", function () {
+        var obj = new HasGetters();
+        expect(obj.getter).toEqual('getter');
+      });
+
+      it("should call static getters", function () {
+        expect(HasGetters.staticGetter).toEqual('getter');
+      });
+    });
   });
 
 }

tools/transpiler/src/outputgeneration/DartParseTreeWriter.js

@@ -18,6 +18,10 @@ import {
   STATIC
 } from 'traceur/src/syntax/TokenType';
 
+import {
+  GET
+} from 'traceur/src/syntax/PredefinedName';
+
 import {ParseTreeWriter as JavaScriptParseTreeWriter, ObjectLiteralExpression} from 'traceur/src/outputgeneration/ParseTreeWriter';
 import {ImportedBinding, BindingIdentifier} from 'traceur/src/syntax/trees/ParseTrees';
 import {IdentifierToken} from 'traceur/src/syntax/IdentifierToken';
@@ -369,6 +373,21 @@ export class DartParseTreeWriter extends JavaScriptParseTreeWriter {
     this.writeSpace_()
   }
 
+  visitGetAccessor(tree) {
+    this.writeAnnotations_(tree.annotations);
+    if (tree.isStatic) {
+      this.write_(STATIC);
+      this.writeSpace_();
+    }
+    this.writeType_(tree.typeAnnotation);
+    this.writeSpace_();
+    this.write_(GET);
+    this.writeSpace_();
+    this.visitAny(tree.name);
+    this.writeSpace_();
+    this.visitAny(tree.body);
+  }
+
   visitNamedParameterList(tree) {
     this.writeList_(tree.parameterNameAndValues, COMMA, false);
   }