callable.h

/*****************************************************/
/* lean Functional              (c) Tobias Zirr 2011 */
/*****************************************************/

#ifndef LEAN_FUNCTIONAL_CALLABLE
#define LEAN_FUNCTIONAL_CALLABLE

#include "../lean.h"
#include "../tags/noncopyable.h"

namespace lean
{
namespace functional
{

template <class Signature>
class callable_fun
{
private:
    Signature *m_fun;

public:
    LEAN_INLINE callable_fun(Signature *fun)
        : m_fun(fun)
    {
        LEAN_ASSERT(m_fun);
    }
    LEAN_INLINE void operator ()()
    {
        (*m_fun)();
    }
};

template <class Class, class Signature>
class callable_memfun
{
private:
    Class *m_obj;
    Signature Class::*m_fun;

public:
    LEAN_INLINE callable_memfun(Class *obj, Signature Class::*fun)
        : m_obj(obj),
        m_fun(fun)
    {
        LEAN_ASSERT(m_obj);
        LEAN_ASSERT(m_fun);
    }
    LEAN_INLINE void operator ()()
    {
        (m_obj->*m_fun)();
    }
};

template <class Signature>
LEAN_INLINE callable_fun<Signature> make_callable(Signature *fun)
{
    return callable_fun<Signature>(fun);
}

template <class Class, class Signature>
LEAN_INLINE callable_memfun<Class, Signature> make_callable(Class *obj, Signature Class::*fun)
{
    return callable_memfun<Class, Signature>(obj, fun);
}

} // namespace

using functional::callable_fun;
using functional::callable_memfun;

using functional::make_callable;

} // namespace

#endif