Class fields, part 1 (parsing and infrastructure)

src/ast/scopes.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_AST_SCOPES_H_
 #define V8_AST_SCOPES_H_
 
 #include "src/ast/variables.h"
 #include "src/base/hashmap.h"
 #include "src/globals.h"
@@ skipping 660 matching lines @@
   // Parameters. The left-most parameter has index 0.
   // Only valid for function scopes.
   Variable* parameter(int index) const {
     DCHECK(is_function_scope());
     return params_[index];
   }
 
   // Returns the default function arity excluding default or rest parameters.
   int default_function_length() const { return arity_; }
 
+  // Normal code should not need to call this. Class field initializers use this
+  // property to store information about the number of fields.

[Benedikt Meurer, 2016/09/08 03:51:02]

That function name seems misleading then.

+  void set_default_function_length(int arity) { arity_ = arity; }
+
   // Returns the number of formal parameters, excluding a possible rest
   // parameter.  Examples:
   //   function foo(a, b) {}         ==> 2
   //   function foo(a, b, ...c) {}   ==> 2
   //   function foo(a, b, c = 1) {}  ==> 3
   int num_parameters() const {
     return has_rest_ ? params_.length() - 1 : params_.length();
   }
 
   // The function's rest parameter (nullptr if there is none).
@@ skipping 152 matching lines @@
   void AllocateModuleVariables();
 
  private:
   ModuleDescriptor* module_descriptor_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_SCOPES_H_