Subject: Re: [boost] [generic programming] header file for general "default" operations for C++ classes
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2016-05-04 10:03:36
On Wednesday, 4 May 2016 17:01:49 MSK Walt Karas wrote:
> In C++, a default assignment operator is generated for a class if all of its
> components (data members and base classes) have an assignment operator.
> There are plans in C++17 to do something similar for comparison operators.
> This header, in
> https://github.com/wkaras/C-plus-plus-library-default-operators ,
> facilitates that, more generally, if there is an operation on all the
> components of a class, a single macro invocation can provide this operation
> on the class as well. A big drawback is that it's very intrusive into the
> class definition. Each class component must be defined using a macro,
> COMPOSITE_OP_MBR_T(int) i; for examle. The class will in truth be a
> template, with the template parameter being defaulted for normal usage. I
> don't know which, if any, existing Boot library this header would belong
I think, Boost.Fusion already provides this for all adapted types.
Boost list run by bdawes at acm.org, gregod at cs.rpi.edu, cpdaniel at pacbell.net, john at johnmaddock.co.uk