Re: [boost] [type_erasure] Review started (July 18-27, 2012)

9 Aug 2012

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-----Original Message-----
From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of Paul A.
Bristow
Sent: Wednesday, August 08, 2012 5:40 PM
To: boost@lists.boost.org
Subject: Re: [boost] [type_erasure] Review started (July 18-27, 2012)
I've checked that using an 

    typedef any<
        mpl::vector
        < // List of concepts.
            typeid_<>,
            arithmetic<>, // Re-using another list of concepts. 
            negatable<>,
            ostreamable<>
        >
    > arith_type;

    arith_type x(10);
    arith_type y(4);

but find that while

x = -y; works as expected,

x = +y doesn't work.

Of course the + is redundant, but I have used it for clarity.

Should the unary plus be included for completeness?

Paul

---
Paul A. Bristow,
Prizet Farmhouse, Kendal LA8 8AB  UK
+44 1539 561830  07714330204
pbristow@hetp.u-net.com