[boost] Boost Optional

Subject: [boost] Boost Optional
From: Rafael Justo (cadastros_at_[hidden])
Date: 2012-03-28 15:55:08

Hello! This is my first post in this list. =)

I was looking today at Boost Optional (great work!).
And I was wondering how could I do something like the bellow code.

--------------------------------
#include <boost/optional.hpp>

class Test {};

boost::optional<Test> get()
{
  return boost::optional<Test>();
}

int main()
{
  if (get() == true) {
    // OK

  } else if (get() == false) {
    // ERROR
  }

  return 0;
}
--------------------------------

But there's no "operator==" with bool in optional.hpp,
so the above code don't compile (i have checked version 1.49).
Is it possible to add the patch described bellow in optional.hpp
to solve this problem?

--------------------------------
--- boost_1_49_0/boost/optional/optional.hpp    2010-12-18
19:29:39.000000000 -0200
+++ boost_1_49_0_new/boost/optional/optional.hpp    2012-03-28
16:03:53.417578997 -0300
@@ -616,6 +616,11 @@
         return *this ;
       }

+    bool operator== (const bool condition)
+      {
+        return ((*this && condition) || (!*this && !condition));
+      }
+
     void swap( optional & arg )
       {
         // allow for Koenig lookup
--------------------------------

Best regards,
Rafael Justo