Replace BindingFlags enum with InitializationFlag enum

src/contexts.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_CONTEXTS_H_
 #define V8_CONTEXTS_H_
 
 #include "src/heap/heap.h"
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
 
 enum ContextLookupFlags {
   FOLLOW_CONTEXT_CHAIN = 1 << 0,
   FOLLOW_PROTOTYPE_CHAIN = 1 << 1,
   STOP_AT_DECLARATION_SCOPE = 1 << 2,
   SKIP_WITH_CONTEXT = 1 << 3,
 
   DONT_FOLLOW_CHAINS = 0,
   FOLLOW_CHAINS = FOLLOW_CONTEXT_CHAIN | FOLLOW_PROTOTYPE_CHAIN,
   LEXICAL_TEST =
       FOLLOW_CONTEXT_CHAIN | STOP_AT_DECLARATION_SCOPE | SKIP_WITH_CONTEXT,
 };
 
 
-// ES5 10.2 defines lexical environments with mutable and immutable bindings.
-// Immutable bindings have two states, initialized and uninitialized, and
-// their state is changed by the InitializeImmutableBinding method. The
-// BindingFlags enum represents information if a binding has definitely been
-// initialized. A mutable binding does not need to be checked and thus has
-// the BindingFlag BINDING_IS_INITIALIZED.
-//
-// There is one possibility for legacy immutable bindings:
-//  * The function name of a named function literal. The binding is immediately
-//    initialized when entering the function and thus does not need to be
-//    checked. it gets the BindingFlag BINDING_IS_INITIALIZED.
-//
-// The harmony proposal for block scoped bindings also introduces the
-// uninitialized state for mutable bindings.
-//  * A 'let' declared variable. They are initialized when evaluating the
-//    corresponding declaration statement. They need to be checked for being
-//    initialized and thus get the flag BINDING_CHECK_INITIALIZED.
-//  * A 'var' declared variable. It is initialized immediately upon creation
-//    and thus doesn't need to be checked. It gets the flag
-//    BINDING_IS_INITIALIZED.
-//  * Catch bound variables, function parameters and variables introduced by
-//    function declarations are initialized immediately and do not need to be
-//    checked. Thus they get the flag BINDING_IS_INITIALIZED.
-// Accessing an uninitialized binding produces a reference error.
-//
-// In V8 uninitialized bindings are set to the hole value upon creation and set
-// to a different value upon initialization.
-enum BindingFlags {
-  BINDING_IS_INITIALIZED,
-  BINDING_CHECK_INITIALIZED,
-  MISSING_BINDING
-};
-
 // Heap-allocated activation contexts.
 //
 // Contexts are implemented as FixedArray objects; the Context
 // class is a convenience interface casted on a FixedArray object.
 //
 // Note: Context must have no virtual functions and Context objects
 // must always be allocated via Heap::AllocateContext() or
 // Factory::NewContext.
 
 #define NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V)                           \
@@ skipping 429 matching lines @@
   //    The binding was found as a named property in a context extension
   //    object (i.e., was introduced via eval), as a property on the subject
   //    of with, or as a property of the global object.  *index is -1 and
   //    *attributes is not ABSENT.
   //
   // 3) result.is_null():
   //    There was no binding found, *index is always -1 and *attributes is
   //    always ABSENT.
   Handle<Object> Lookup(Handle<String> name, ContextLookupFlags flags,
                         int* index, PropertyAttributes* attributes,
-                        BindingFlags* binding_flags,
+                        InitializationFlag* init_flag,
                         VariableMode* variable_mode);
 
   // Code generation support.
   static int SlotOffset(int index) {
     return kHeaderSize + index * kPointerSize - kHeapObjectTag;
   }
 
   static int FunctionMapIndex(LanguageMode language_mode, FunctionKind kind) {
     // Note: Must be kept in sync with FastNewClosureStub::Generate.
     if (IsGeneratorFunction(kind)) {
@@ skipping 45 matching lines @@
 #endif
 
   STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize);
   STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CONTEXTS_H_