Await it!

runtime/vm/parser.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_PARSER_H_
 #define VM_PARSER_H_
 
 #include "include/dart_api.h"
 
 #include "platform/assert.h"
@@ skipping 37 matching lines @@
         saved_entry_context_var_(NULL),
         expression_temp_var_(NULL),
         finally_return_temp_var_(NULL),
         await_temps_scope_(NULL),
         deferred_prefixes_(new ZoneGrowableArray<const LibraryPrefix*>()),
         first_parameter_index_(0),
         first_stack_local_index_(0),
         num_copied_params_(0),
         num_stack_locals_(0),
         have_seen_await_expr_(false),
+        saved_try_ctx_(NULL),
+        async_saved_try_ctx_(NULL),
         isolate_(isolate) {
     ASSERT(function.IsZoneHandle());
   }
 
   const Function& function() const { return function_; }
   const Code& code() const { return code_; }
 
   SequenceNode* node_sequence() const { return node_sequence_; }
   void SetNodeSequence(SequenceNode* node_sequence);
 
@@ skipping 80 matching lines @@
     ASSERT(await_temps_scope_ != NULL);
     return await_temps_scope_;
   }
 
   void record_await() {
     have_seen_await_expr_ = true;
   }
   void reset_have_seen_await() { have_seen_await_expr_ = false; }
   bool have_seen_await() const { return have_seen_await_expr_; }
 
+  void set_saved_try_ctx(LocalVariable* saved_try_ctx) {
+    ASSERT((saved_try_ctx != NULL) && !saved_try_ctx->is_captured());
+    saved_try_ctx_ = saved_try_ctx;
+  }
+  LocalVariable* saved_try_ctx() const { return saved_try_ctx_; }
+
+  void set_async_saved_try_ctx(LocalVariable* async_saved_try_ctx) {
+    ASSERT((async_saved_try_ctx != NULL) && async_saved_try_ctx->is_captured());
+    async_saved_try_ctx_ = async_saved_try_ctx;
+  }
+  LocalVariable* async_saved_try_ctx() const { return async_saved_try_ctx_; }
+
+  void reset_saved_try_ctx_vars() {
+    saved_try_ctx_ = NULL;
+    async_saved_try_ctx_ = NULL;
+  }
+
   Isolate* isolate() const { return isolate_; }
 
  private:
   const Function& function_;
   Code& code_;
   SequenceNode* node_sequence_;
   LocalVariable* instantiator_;
   Array& default_parameter_values_;
   LocalVariable* saved_current_context_var_;
   LocalVariable* saved_entry_context_var_;
   LocalVariable* expression_temp_var_;
   LocalVariable* finally_return_temp_var_;
   LocalScope* await_temps_scope_;
   ZoneGrowableArray<const LibraryPrefix*>* deferred_prefixes_;
 
   int first_parameter_index_;
   int first_stack_local_index_;
   int num_copied_params_;
   int num_stack_locals_;
   bool have_seen_await_expr_;
+  LocalVariable* saved_try_ctx_;
+  LocalVariable* async_saved_try_ctx_;
 
   Isolate* isolate_;
 
   DISALLOW_COPY_AND_ASSIGN(ParsedFunction);
 };
 
 
 class Parser : public ValueObject {
  public:
   // Parse the top level of a whole script file and register declared classes
@@ skipping 511 matching lines @@
   AstNode* MakeAssertCall(intptr_t begin, intptr_t end);
   AstNode* ThrowTypeError(intptr_t type_pos, const AbstractType& type);
   AstNode* ThrowNoSuchMethodError(intptr_t call_pos,
                                   const Class& cls,
                                   const String& function_name,
                                   ArgumentListNode* function_arguments,
                                   InvocationMirror::Call call,
                                   InvocationMirror::Type type,
                                   const Function* func);
 
+  void SetupSavedTryContext(LocalScope* saved_try_context_scope,
+                            int16_t try_index,
+                            SequenceNode* target);
+
   void CheckOperatorArity(const MemberDesc& member);
 
   void EnsureExpressionTemp();
   void EnsureSavedCurrentContext();
   bool IsLegalAssignableSyntax(AstNode* expr, intptr_t end_pos);
   AstNode* CreateAssignmentNode(AstNode* original,
                                 AstNode* rhs,
                                 const String* left_ident,
                                 intptr_t left_pos);
   AstNode* InsertClosureCallNodes(AstNode* condition);
@@ skipping 64 matching lines @@
   int16_t last_used_try_index_;
 
   bool unregister_pending_function_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_