[modules] Basic support of exports

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"
 
@@ skipping 209 matching lines @@
   V(SYMBOL_FUNCTION_INDEX, JSFunction, symbol_function)                        \
   V(TYPED_ARRAY_FUN_INDEX, JSFunction, typed_array_function)                   \
   V(TYPED_ARRAY_PROTOTYPE_INDEX, JSObject, typed_array_prototype)              \
   V(UINT16_ARRAY_FUN_INDEX, JSFunction, uint16_array_fun)                      \
   V(UINT16X8_FUNCTION_INDEX, JSFunction, uint16x8_function)                    \
   V(UINT32_ARRAY_FUN_INDEX, JSFunction, uint32_array_fun)                      \
   V(UINT32X4_FUNCTION_INDEX, JSFunction, uint32x4_function)                    \
   V(UINT8_ARRAY_FUN_INDEX, JSFunction, uint8_array_fun)                        \
   V(UINT8_CLAMPED_ARRAY_FUN_INDEX, JSFunction, uint8_clamped_array_fun)        \
   V(UINT8X16_FUNCTION_INDEX, JSFunction, uint8x16_function)                    \
+  V(CURRENT_MODULE_INDEX, JSModule, current_module)                                            \
   NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V)                                        \
   NATIVE_CONTEXT_IMPORTED_FIELDS(V)
 
 // A table of all script contexts. Every loaded top-level script with top-level
 // lexical declarations contributes its ScriptContext into this table.
 //
 // The table is a fixed array, its first slot is the current used count and
 // the subsequent slots 1..used contain ScriptContexts.
 class ScriptContextTable : public FixedArray {
  public:
@@ skipping 63 matching lines @@
 //                (through 'eval'). The object in a 'with' statement is
 //                stored in the extension slot of a 'with' context.
 //                Dynamically declared variables/functions are also added
 //                to lazily allocated extension object. Context::Lookup
 //                searches the extension object for properties.
 //                For script and block contexts, contains the respective
 //                ScopeInfo. For block contexts representing sloppy declaration
 //                block scopes, it may also be a struct being a
 //                SloppyBlockWithEvalContextExtension, pairing the ScopeInfo
 //                with an extension object.
+//                XXX module
 //
 // [ native_context ]  A pointer to the native context.
 //
 // In addition, function contexts may have statically allocated context slots
 // to store local variables/functions that are accessed from inner functions
 // (via static context addresses) or through 'eval' (dynamic context lookups).
 // The native context contains additional slots for fast access to native
 // properties.
 //
 // Finally, with Harmony scoping, the JSFunction representing a top level
@@ skipping 57 matching lines @@
   inline Object* next_context_link();
 
   inline bool has_extension();
   inline HeapObject* extension();
   inline void set_extension(HeapObject* object);
   JSObject* extension_object();
   JSReceiver* extension_receiver();
   ScopeInfo* scope_info();
   String* catch_name();
 
+  // Find the module context (assuming there is one) and return the associated
+  // module object.
+  JSModule* module();
+
   // Get the context where var declarations will be hoisted to, which
   // may be the context itself.
-  Context* declaration_context();
+  Context* declaration_context();  // XXX should this return a module context?
   bool is_declaration_context();
 
   // Get the next closure's context on the context chain.
   Context* closure_context();
 
   // Returns a JSGlobalProxy object or null.
   JSObject* global_proxy();
   void set_global_proxy(JSObject* global);
 
   // Get the JSGlobalObject object.
@@ skipping 124 matching lines @@
 #endif
 
   STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize);
   STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CONTEXTS_H_