Re: [Boost-users] [variant] how to get 1st bounded type

From: Nat Goodspeed (nat_at_[hidden])
Date: 2008-05-07 22:18:11

Igor R. wrote:

>             The reason I wanted to test if the variant contains its 1st
>             type is the following: my variant is made of a list
>             of shared-pointers to various types; there's a routine that
>             initializes it with one of the types depending on some
>             conditions, then it applies some visitor on the resulting
>             variant and stores it then in a container - however, there's
>             no "default" behavior, so if neither condition was met, the
>             variant remains "uninitialized" - i.e. it contains 1st type
>             "zero" ptr. I want neither apply the visitor on "empty"
>             smartpointer nor store it in the container, so I have to
>             know whether it was "really" created or not. 

Um, wrap the variant in boost::optional?