Re: [boost] Math constants - (in-)Formal Review?

From: John Maddock (jm_at_[hidden])
Date: 2002-12-13 07:24:43

> Why won't this work:
>
> struct Pi_impl
> {
>         operator float() const
>        { return 3.14...; }
>
>         operator double() const
>        { return 3.14.................; };
>
>        operator long double() const
>       { return 3.14..............................;}
> };
>
> namespace boost
> {
>     const Pi_impl pi;
> }
>
> ?

Template function overload resolution is one:

std::abs(pi);  // oops error

another is that it is not extensible: how for example should I add constants
for boost::interval? Or some other as yet unthought of (or user defined)
type?

John Maddock
http://ourworld.compuserve.com/homepages/john_maddock/index.htm