More useful result pretty printing for d8

src/d8.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 196 matching lines @@
   } else {
     Handle<Value> result = script->Run();
     if (result.IsEmpty()) {
       ASSERT(try_catch.HasCaught());
       // Print errors that happened during execution.
       if (report_exceptions && !FLAG_debugger)
         ReportException(isolate, &try_catch);
       return false;
     } else {
       ASSERT(!try_catch.HasCaught());
-      if (print_result && !result->IsUndefined()) {
-        // If all went well and the result wasn't undefined then print
-        // the returned value.
-        v8::String::Utf8Value str(result);
-        size_t count = fwrite(*str, sizeof(**str), str.length(), stdout);
-        (void) count;  // Silence GCC-4.5.x "unused result" warning.
-        printf("\n");
+      if (print_result) {
+        if (options.test_shell) {
+          if (!result->IsUndefined()) {
+            // If all went well and the result wasn't undefined then print
+            // the returned value.
+            v8::String::Utf8Value str(result);
+            fwrite(*str, sizeof(**str), str.length(), stdout);
+            printf("\n");
+          }
+        } else {
+          Context::Scope context_scope(utility_context_);
+          Handle<Object> global = utility_context_->Global();
+          Handle<Value> fun = global->Get(String::New("Stringify"));
+          Handle<Value> argv[1] = { result };
+          Handle<Value> s = Handle<Function>::Cast(fun)->Call(global, 1, argv);
+          v8::String::Utf8Value str(s);
+          fwrite(*str, sizeof(**str), str.length(), stdout);
+          printf("\n");
+        }
       }
       return true;
     }
   }
 }
 
 
 Handle<Value> Shell::Print(const Arguments& args) {
   Handle<Value> val = Write(args);
   printf("\n");
@@ skipping 1735 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif