Re: [boost] [variant] Visual Studio debug visualizers

Subject: Re: [boost] [variant] Visual Studio debug visualizers
From: Dmitry Vinogradov (sraider_at_[hidden])
Date: 2009-06-14 05:21:25

Steven Watanabe wrote:
> AMDG
> 
> Dmitry Vinogradov wrote:
>> I wrote a simple debug visualizer for boost::variant and I want to 
>> share it with community.
>>
>> boost::variant<*,*,*,*,*,*,*,*,*,*,*> {
>>     preview (
>>         #(
>>             #switch($c.which_)
>>             #case 0 ( *($T1 *)&($c.storage_.data_) )
>>             <snip...>
>>         )
>>     )
>>     children
>>     (
>>         #(
>>         value:
>>             #switch($c.which_)
>>             #case 0 ( *($T1 *)&($c.storage_.data_) )
>>             <snip...>
>>         )
>>     )
>> }
> 
> This is a great start.  There are a few more things I'd like to see.
> * if which_ is negative it means that the variant is storing a pointer
>  to an object of type T ## -(which_ + 1).

Please tell me how to reproduce it. Does it for recursive_wrapper?

> * make_variant_over allows a variant to be created from a type sequence.
> * make_recursive variant causes the type of the variant itself to be 
> substituted
>  any instances of the placeholder boost::recursive_variant in the template
>  arguments.
> 
> The latter two are hard and may be impossible to support, but I would
> definitely like to see support for the first point.

I'll try it.