How to obtain Variant underlying type?

[drug007]

On 7/10/22 20:26, anonymouse wrote:
> On Sunday, 10 July 2022 at 06:26:37 UTC, jfondren wrote:
>> ```d
>> import std.variant : Variant;
>>
>> size_t[] shape(Variant v) {
>>     import std.variant : VariantException;
>>
>>     size_t[] s;
>>     try {
>>         while (true) {
>>             Variant elem = v[0];
>>             s ~= v.length;
>>             v = elem;
>>         }
>>     } catch (VariantException e) {
>>         return s;
>>     }
>> }
>> ```
> 
> Thank you very much.
> 

I'd like to say that using of exception to break loop is really bad. 
Exception is exceptional thing but in the case above the exception is 
ordinary completion of the loop happens on regular basis. Don't do that.