From 83f1856d6ae1226923c7abd26062f23ebfdeb421 Mon Sep 17 00:00:00 2001
From: Tim Blasi <tjblasi@google.com>
Date: Tue, 2 Jun 2015 18:07:44 -0700
Subject: [PATCH] feat(dart/transform): Add support for the safe navigation
 operator

Adds support for ?. to pregenerated Dart Change Detectors.

Closes #791
---
 .../template_compiler/change_detector_codegen.dart       | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/modules/angular2/src/transform/template_compiler/change_detector_codegen.dart b/modules/angular2/src/transform/template_compiler/change_detector_codegen.dart
index 2ad4a9e409..2916382e77 100644
--- a/modules/angular2/src/transform/template_compiler/change_detector_codegen.dart
+++ b/modules/angular2/src/transform/template_compiler/change_detector_codegen.dart
@@ -303,6 +303,10 @@ class _CodegenState {
         rhs = '$context.${r.name}';
         break;
 
+      case RECORD_TYPE_SAFE_PROPERTY:
+        rhs = '${_UTIL}.isValueBlank(${context}) ? null : ${context}.${r.name}';
+        break;
+
       case RECORD_TYPE_LOCAL:
         rhs = '$_LOCALS_ACCESSOR.get("${r.name}")';
         break;
@@ -311,6 +315,11 @@ class _CodegenState {
         rhs = '$context.${r.name}($argString)';
         break;
 
+      case RECORD_TYPE_SAFE_INVOKE_METHOD:
+        rhs = '${_UTIL}.isValueBlank(${context}) '
+            '? null : ${context}.${r.name}(${argString})';
+        break;
+
       case RECORD_TYPE_INVOKE_CLOSURE:
         rhs = '$context($argString)';
         break;