Check for extension methods when using whitelist

lib/src/compiler/code_generator.dart

Index: lib/src/compiler/code_generator.dart
diff --git a/lib/src/compiler/code_generator.dart b/lib/src/compiler/code_generator.dart
index d8dc934cd76b0d39a77b0de86dcfe1a200876459..db92481bd97c2cfb46139fc3ffecc3a3c9168994 100644
--- a/lib/src/compiler/code_generator.dart
+++ b/lib/src/compiler/code_generator.dart
@@ -2532,7 +2532,13 @@ class CodeGenerator extends GeneralizingAstVisitor
 
     if (target != null && DynamicInvoke.get(target)) {
       if (_inWhitelistCode(lhs)) {
-        return _visit(rhs).toAssignExpression(_visit(lhs));
+        var vars = <JS.MetaLetVariable, JS.Expression>{};
+        var l = _visit(_bindValue(vars, 'l', target));
+        var name = _emitMemberName(id.name);
+        return new JS.MetaLet(vars, [
+          js.call('(#[(#[dart._extensionType]) ? dartx[#] : #] = #)',
+                  [l, l, name, name, _visit(rhs)])
+        ]);
       }
       return js.call('dart.dput(#, #, #)',
           [_visit(target), _emitMemberName(id.name), _visit(rhs)]);
@@ -2665,7 +2671,13 @@ class CodeGenerator extends GeneralizingAstVisitor
     JS.Expression jsTarget = _visit(target);
     if (DynamicInvoke.get(target) || DynamicInvoke.get(node.methodName)) {
       if (_inWhitelistCode(target)) {
-        jsTarget = new JS.PropertyAccess(jsTarget, memberName);
+        var vars = <JS.MetaLetVariable, JS.Expression>{};
+        var l = _visit(_bindValue(vars, 'l', target));
+        jsTarget =
+            new JS.MetaLet(vars, [
+              js.call('(#[(#[dart._extensionType]) ? dartx[#] : #])',
+                      [l, l, memberName, memberName,])
+            ]);
         if (typeArgs != null) jsTarget = new JS.Call(jsTarget, typeArgs);
         return new JS.Call(jsTarget, args);
       }
@@ -3880,7 +3892,11 @@ class CodeGenerator extends GeneralizingAstVisitor
         type: getStaticType(target), isStatic: isStatic);
     if (DynamicInvoke.get(target)) {
       if (_inWhitelistCode(target)) {
-        return js.call('#.#', [_visit(target), name]);
+        var vars = <JS.MetaLetVariable, JS.Expression>{};
+        var l = _visit(_bindValue(vars, 'l', target));
+        return new JS.MetaLet(vars, [
+          js.call('(#[dart._extensionType]) ? #[dartx[#]] : #.#', [l, l, name, l, name])

[Jacob, 2016/06/02 03:07:51]

long line.
Also I believe there is a way to specify named template
arguments. Doesn't really matter as this code should be short lived.

+        ]);
       }
       return js.call('dart.dload(#, #)', [_visit(target), name]);
     }