Chris@16: // - construct.hpp -- Lambda Library -------------
Chris@16: //
Chris@16: // Copyright (C) 2000 Gary Powell (powellg@amazon.com)
Chris@16: // Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // For more information, see http://www.boost.org
Chris@16: //
Chris@16: // -----------------------------------------------
Chris@16: 
Chris@16: #if !defined(BOOST_LAMBDA_CONSTRUCT_HPP)
Chris@16: #define BOOST_LAMBDA_CONSTRUCT_HPP
Chris@16: 
Chris@16: #include "boost/type_traits/remove_cv.hpp"
Chris@16: #include "boost/type_traits/is_pointer.hpp"
Chris@16: 
Chris@16: namespace boost { 
Chris@16: namespace lambda {
Chris@16: 
Chris@16:   // constructor is used together with bind. constructor<A> creates a bindable
Chris@16:   // function object that passes its arguments forward to a constructor call
Chris@16:   // of type A
Chris@16: 
Chris@16: template<class T> struct constructor {
Chris@16: 
Chris@16:   template <class U> struct sig { typedef T type; };
Chris@16: 
Chris@16:   T operator()() const {
Chris@16:     return T();
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1>
Chris@16:   T operator()(A1& a1) const {
Chris@16:     return T(a1);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2>
Chris@16:   T operator()(A1& a1, A2& a2) const {
Chris@16:     return T(a1, a2);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3>
Chris@16:   T operator()(A1& a1, A2& a2, A3& a3) const {
Chris@16:     return T(a1, a2, a3);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4>
Chris@16:   T operator()(A1& a1, A2& a2, A3& a3, A4& a4) const {
Chris@16:     return T(a1, a2, a3, a4);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5>
Chris@16:   T operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5) const {
Chris@16:     return T(a1, a2, a3, a4, a5);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5, class A6>
Chris@16:   T operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6& a6) const {
Chris@16:     return T(a1, a2, a3, a4, a5, a6);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5, class A6, class A7>
Chris@16:   T operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6& a6, A7& a7) const {
Chris@16:     return T(a1, a2, a3, a4, a5, a6, a7);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8>
Chris@16:   T operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6& a6, A7& a7, A8& a8) const {
Chris@16:     return T(a1, a2, a3, a4, a5, a6, a7, a8);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9>
Chris@16:   T operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6& a6, A7& a7, A8& a8, A9& a9) const {
Chris@16:     return T(a1, a2, a3, a4, a5, a6, a7, a8, a9);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10>
Chris@16:   T operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6& a6, A7& a7, A8& a8, A9& a9, A10& a10) const {
Chris@16:     return T(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10);
Chris@16:   }
Chris@16: 
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: namespace detail {
Chris@16: 
Chris@16: // A standard conforming compiler could disambiguate between
Chris@16: // A1* and A1&, but not all compilers do that, so we need the
Chris@16: // helpers
Chris@16: 
Chris@16: 
Chris@16: template <bool IsPointer>
Chris@16: struct destructor_helper {
Chris@16: 
Chris@16:   template<class A1>
Chris@16:   static void exec(A1& a1) {
Chris@16:     // remove all the qualifiers, not sure whether it is necessary
Chris@16:     typedef typename boost::remove_cv<A1>::type plainA1;
Chris@16:      a1.~plainA1();
Chris@16:   }
Chris@16: };
Chris@16: 
Chris@16: template <>
Chris@16: struct destructor_helper<true> {
Chris@16: 
Chris@16:   template<class A1>
Chris@16:   static void exec(A1* a1) {
Chris@16:     typedef typename boost::remove_cv<A1>::type plainA1;
Chris@16:     (*a1).~plainA1();
Chris@16:   }
Chris@16: };
Chris@16: 
Chris@16: }
Chris@16: 
Chris@16: // destructor funtion object
Chris@16: struct destructor {  
Chris@16: 
Chris@16:   template <class T> struct sig { typedef void type; };  
Chris@16: 
Chris@16:   template<class A1>
Chris@16:   void operator()(A1& a1) const {
Chris@16:     typedef typename boost::remove_cv<A1>::type plainA1;
Chris@16:     detail::destructor_helper<boost::is_pointer<plainA1>::value>::exec(a1);
Chris@16:   }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: // new_ptr is used together with bind.
Chris@16: 
Chris@16:   // note: placement new is not supported
Chris@16: 
Chris@16: template<class T> struct new_ptr {
Chris@16: 
Chris@16:   template <class U> struct sig { typedef T* type; };  
Chris@16: 
Chris@16:   T* operator()() const {
Chris@16:     return new T();
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1>
Chris@16:   T* operator()(A1& a1) const {
Chris@16:     return new T(a1);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2>
Chris@16:   T* operator()(A1& a1, A2& a2) const {
Chris@16:     return new T(a1, a2);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3>
Chris@16:   T* operator()(A1& a1, A2& a2, A3& a3) const {
Chris@16:     return new T(a1, a2, a3);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4>
Chris@16:   T* operator()(A1& a1, A2& a2, A3& a3, A4& a4) const {
Chris@16:     return new T(a1, a2, a3, a4);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5>
Chris@16:   T* operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5) const {
Chris@16:     return new T(a1, a2, a3, a4, a5);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5, class A6>
Chris@16:   T* operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6& a6) const {
Chris@16:     return new T(a1, a2, a3, a4, a5, a6);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5, class A6, class A7>
Chris@16:   T* operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6& a6, A7& a7) const {
Chris@16:     return new T(a1, a2, a3, a4, a5, a6, a7);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8>
Chris@16:   T* operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6& a6, A7& a7, A8& a8) const {
Chris@16:     return new T(a1, a2, a3, a4, a5, a6, a7, a8);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9>
Chris@16:   T* operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6& a6, A7& a7, A8& a8, A9& a9) const {
Chris@16:     return new T(a1, a2, a3, a4, a5, a6, a7, a8, a9);
Chris@16:   }
Chris@16: 
Chris@16:   template<class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9, class A10>
Chris@16:   T* operator()(A1& a1, A2& a2, A3& a3, A4& a4, A5& a5, A6& a6, A7& a7, A8& a8, A9& a9, A10& a10) const {
Chris@16:     return new T(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10);
Chris@16:   }
Chris@16: 
Chris@16: };
Chris@16: 
Chris@16: // delete_ptr return void
Chris@16: 
Chris@16: struct delete_ptr {
Chris@16: 
Chris@16:   template <class U> struct sig { typedef void type; };  
Chris@16: 
Chris@16:   template <class A1>
Chris@16:   void operator()(A1& a1) const {
Chris@16:     delete a1;
Chris@16:   }
Chris@16: 
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: // new_array is used together with bind.
Chris@16: 
Chris@16: template<class T> struct new_array {
Chris@16: 
Chris@16:   template <class U> struct sig { typedef T* type; };  
Chris@16: 
Chris@16:   T* operator()(int size) const {
Chris@16:     return new T[size];
Chris@16:   }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: // delete_ptr return void
Chris@16: 
Chris@16: struct delete_array {
Chris@16: 
Chris@16:   template <class U> struct sig { typedef void type; };  
Chris@16: 
Chris@16:   template <class A1>
Chris@16:   void operator()(A1& a1) const {
Chris@16:     delete[] a1;
Chris@16:   }
Chris@16: 
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: } // namespace lambda 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif