On Jun 21, 2008, at 12:22, Steven Watanabe wrote:
Chris Ross wrote:
When I try to use boost::lexical_cast<int>(anyvar), I get compile errors [...] Can anyone else figure out why the above compile fails?
any does not support streaming, which is required for lexical_cast.
std::cout << is << std::endl;
should give similar errors.
Okay, that makes sense. Thank you for explaining why lexical_cast isn't able to do what I hoped it would with my boost::any. Does anyone have a suggestion as to how I can get a value out of a boost::any for which I don't know the specific type stored in it? A subclass method is returning the boost::any, which is conceptually a bool, but different subclasses may implement it as a bool, int, int64_t, etc. I can just static-cast them to bool if I can get the value out of the boost::any, but boost::any_cast gives a bad_any_cast unless I cast it to exactly the right type (which as I noted, the super-class doesn't know) Thanks. Any suggestions would be appreciated. - Chris