[boost] boost::any: explicit constructor?

From: Vladimir Prus (ghost_at_[hidden])
Date: 2004-02-25 05:22:58

Hi,
I just had a couple of bugs caused by the fact that constructor of boost::any 
is not explicit. For example:

   void do_something(boost::any& v) { ... }

   class variable {
    /////
        boost::any& value() {}
    };

    variable v;
    do_something(v);

The intention was to call do_somethin on 'v.value()' but non-explicit ctor is 
happy to accept 'variable', after which 'do_something' breaks.

Anybody has an opinion? Is non-explicit ctor really necessary?

- Volodya