On Wed, Jul 2, 2008 at 4:12 AM, Joel de Guzman <joel@boost-consulting.com> wrote:
Giovanni Piero Deretta wrote:
- Last time I checked Phoenix only had a monomoprhic bind. If you have polymorphic functions you have to convert them to lazy functions. I think that adding a polymorphic bind (like lambda shouldn't be hard).
Boost.Lambda has polymorphic bind? How can it do that? Bind is inherently monomorphic. What am I missing?
Uh? Even C++0x bind is polymorphic: struct plus_t { template<class A, class B> [] operator()(A a, B b) -> decltype(a + b) { return a + b; } }; auto plus = std::bind(plus_t(), _1, _2); int a = plus(1, 2); std::string b = plus(std::string("hello"), std::string("world")); With appropriate 'sig' magic in plus_t you can do the same thing with boost.lambda (but not with boost.bind). Or we are talking about different kind of polymorphism? -- gpd