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From: ytomino <aghia05@gmail.com>
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Subject: Re: discriminant questions
Date: Sun, 18 Sep 2011 09:22:35 -0700 (PDT)
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Date: 2011-09-18T09:22:35-07:00
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You're right.
Smart pointer shold support type conversions supported on raw access
types like access all to access constant, or derived type to base
type.
Indefinite_Holder does not support these conversions.
I was not careful of it.

>   X + Y

Well, if semantics of smart pointer differs from semantics of value, I
think it makes misunderstanding.
(so I want to write X.all + Y.all)