Jorge Lodos wrote:
Hi The following is a partial solution for boost::any operations, including operator==. [ skiped ] This is different from any_cast in that it returns a reference, instead of a copy. Note also that this will never be used implicitely, you have to call operator ValueType&() explicitely.
any_cast already supports reference types.
Operations with values can be added as:
template <typename ValueType> bool operator==(const ValueType& rhs) { return rhs == this->operator ValueType&(); }
Or
template <typename ValueType> any& operator+=(const ValueType& rhs) { this->operator ValueType&() += rhs; return *this; }
There is another way of doing this: typedef mpl::vector< less<typeof(_1 == _2)> , plus<typeof(_1 + _2)> > ops; any<ops> a = 0; any<ops> b = a + a; assert( b == a ); I have a partial solution but I want better multimethods. -- Alexander Nasonov Project Manager http://www.akmosoft.com