[modules] Improve error messages.

src/objects.h

 // Copyright 2015 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 4722 matching lines @@
   friend class ScopeIterator;
 };
 
 class ModuleInfoEntry : public FixedArray {
  public:
   DECLARE_CAST(ModuleInfoEntry)
   static Handle<ModuleInfoEntry> New(Isolate* isolate,
                                      Handle<Object> export_name,
                                      Handle<Object> local_name,
                                      Handle<Object> import_name,
-                                     Handle<Object> module_request);
+                                     Handle<Object> module_request, int beg_pos,
+                                     int end_pos);
   inline Object* export_name() const;
   inline Object* local_name() const;
   inline Object* import_name() const;
   inline Object* module_request() const;
+  inline int beg_pos() const;
+  inline int end_pos() const;
 
  private:
   friend class Factory;
   enum {
     kExportNameIndex,
     kLocalNameIndex,
     kImportNameIndex,
     kModuleRequestIndex,
+    kBegPosIndex,
+    kEndPosIndex,
     kLength
   };
 };
 
 // ModuleInfo is to ModuleDescriptor what ScopeInfo is to Scope.
 class ModuleInfo : public FixedArray {
  public:
   DECLARE_CAST(ModuleInfo)
 
   static Handle<ModuleInfo> New(Isolate* isolate, Zone* zone,
@@ skipping 3450 matching lines @@
   // The [must_resolve] argument indicates whether or not an exception should be
   // thrown in case the module does not provide an export named [name]
   // (including when a cycle is detected).  An exception is always thrown in the
   // case of conflicting star exports.
   //
   // If [must_resolve] is true, a null result indicates an exception. If
   // [must_resolve] is false, a null result may or may not indicate an
   // exception (so check manually!).
   class ResolveSet;
   static MUST_USE_RESULT MaybeHandle<Cell> ResolveExport(
-      Handle<Module> module, Handle<String> name, bool must_resolve,
-      ResolveSet* resolve_set);
+      Handle<Module> module, Handle<String> name, MessageLocation loc,
+      bool must_resolve, ResolveSet* resolve_set);
   static MUST_USE_RESULT MaybeHandle<Cell> ResolveImport(
       Handle<Module> module, Handle<String> name, int module_request,
-      bool must_resolve, ResolveSet* resolve_set);
+      MessageLocation loc, bool must_resolve, ResolveSet* resolve_set);
 
   // Helper for ResolveExport.
   static MUST_USE_RESULT MaybeHandle<Cell> ResolveExportUsingStarExports(
-      Handle<Module> module, Handle<String> name, bool must_resolve,
-      ResolveSet* resolve_set);
+      Handle<Module> module, Handle<String> name, MessageLocation loc,
+      bool must_resolve, ResolveSet* resolve_set);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Module);
 };
 
 // JSBoundFunction describes a bound function exotic object.
 class JSBoundFunction : public JSObject {
  public:
   // [bound_target_function]: The wrapped function object.
   DECL_ACCESSORS(bound_target_function, JSReceiver)
 
@@ skipping 3510 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_