Compute KernelClosureRepresentationInfo.variableIsUsedInTryOrSync

pkg/compiler/lib/src/kernel/element_map_impl.dart

Index: pkg/compiler/lib/src/kernel/element_map_impl.dart
diff --git a/pkg/compiler/lib/src/kernel/element_map_impl.dart b/pkg/compiler/lib/src/kernel/element_map_impl.dart
index e7d3cd0d506cd82b588be8635cb46f08e514bb25..54b2504bb76966200deb4a527258387220efc5fc 100644
--- a/pkg/compiler/lib/src/kernel/element_map_impl.dart
+++ b/pkg/compiler/lib/src/kernel/element_map_impl.dart
@@ -47,9 +47,24 @@ part 'native_basic_data.dart';
 part 'no_such_method_resolver.dart';
 part 'types.dart';
 
+/// Interface for kernel queries needed to implement the [CodegenWorldBuilder].
+abstract class KernelToWorldBuilder implements KernelToElementMap {
+  /// Returns `true` if [field] has a constant initializer.
+  bool hasConstantFieldInitializer(FieldEntity field);
+
+  /// Returns the constant initializer for [field].
+  ConstantValue getConstantFieldInitializer(FieldEntity field);
+
+  /// Calls [f] for each parameter of [function] providing the type and name of
+  /// the parameter and the [defaultValue] if the parameter is optional.
+  void forEachParameter(FunctionEntity function,
+      void f(DartType type, String name, ConstantValue defaultValue));
+}
+
 /// Element builder used for creating elements and types corresponding to Kernel
 /// IR nodes.
-class KernelToElementMapImpl extends KernelToElementMapMixin {
+class KernelToElementMapImpl extends KernelToElementMapMixin
+    implements KernelToWorldBuilder {
   final Environment _environment;
   CommonElements _commonElements;
   native.BehaviorBuilder _nativeBehaviorBuilder;
@@ -1752,7 +1767,8 @@ class KernelNativeMemberResolver extends NativeMemberResolverBase {
   }
 }
 
-class JsKernelToElementMap extends KernelToElementMapMixin {
+class JsKernelToElementMap extends KernelToElementMapMixin
+    implements KernelToWorldBuilder {
   final JsToFrontendMap _map;
   final ElementEnvironment _elementEnvironment;
   final CommonElements _commonElements;
@@ -1877,4 +1893,22 @@ class JsKernelToElementMap extends KernelToElementMapMixin {
   ConstantValue getFieldConstantValue(ir.Field field) {
     throw new UnsupportedError("JsKernelToElementMap.getFieldConstantValue");
   }
+
+  @override
+  void forEachParameter(FunctionEntity function,
+      void f(DartType type, String name, ConstantValue defaultValue)) {
+    throw new UnsupportedError("JsKernelToElementMap.forEachParameter");
+  }
+
+  @override
+  ConstantValue getConstantFieldInitializer(FieldEntity field) {
+    throw new UnsupportedError(
+        "JsKernelToElementMap.getConstantFieldInitializer");
+  }
+
+  @override
+  bool hasConstantFieldInitializer(FieldEntity field) {
+    throw new UnsupportedError(
+        "JsKernelToElementMap.hasConstantFieldInitializer");
+  }
 }