gistfile1.cpp

v8::Local<v8::Function> MkFunction(v8::Handle<v8::String> body) {
  v8::HandleScope scope;

  // Get global object
  v8::Local<v8::Object> global = v8::Context::GetCurrent()->Global();
 
  // Get built-in Function constructor (see ECMA-262 5th edition 15.3.2)
  v8::Local<v8::Function> function_ctor =
      v8::Local<v8::Function>::Cast(global->Get(v8::String::New("Function")));

  // Invoke Function constructor to create function with the given body and no arguments
  v8::Handle<v8::Value> argv[1] = { body };
  v8::Local<v8::Object> function = function_ctor->NewInstance(1, argv);

  return scope.Close(v8::Local<v8::Function>::Cast(function));
}

Readability masterpiece. =)

I hope there is no sarcasm in your words as I tried to make it as readable as possible --- this is an answer to a question of a V8 embedder :-)