Re: [Boost-users] [proto] learning proto slowly, a small (math)complex library

Subject: Re: [Boost-users] [proto] learning proto slowly, a small (math)complex library
From: Joel Falcou (joel.falcou_at_[hidden])
Date: 2011-01-10 06:53:36

On 10/01/11 11:47, alfC wrote:
> 1) is this true?
Yes

> 2) if yes, then that means that one of the 2 types (type complex or
> typeof(4.+5.*i) ), will have to be modified (or extendended) in other
> to accept this syntax.
> 3) if no , how can I allow this syntax?

See the boostcon slides of Eric last year. All you need is to give your 
complex expression an operator to cast itself to std::complex in which 
you evaluate the expression real and imag part and retrun the newly 
constructed std::complex out of it.

Incidentally, i am using this very same example in a courses on DSEL 
design in C++ i am starting to write atm. So i can shed some light if 
you want.