Re: [boost] mpl::equal_to changes

From: Cromwell Enage (sponage_at_[hidden])
Date: 2004-09-24 14:01:45

--- Ian McCulloch <ianmcc_at_[hidden]>
wrote:
> Hi,

Hello.

> Is the following program supposed to compile with
> the new MPL?

Probably not.

> But, maybe I was mis-using equal_to ?

equal_to<...> no longer accepts bool_<...> or any
expressions resulting in bool_<...> as a template
argument, since bool_<...> does not contain a typedef
named tag (for numeric_cast<...>).  I don't have the
MPL book, so I don't know the rationale behind it, but
working around it should be as simple as an
eval_if<...> statement.

                              HTH
                              Cromwell Enage

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