STL stl_construct.h

stl_construct.h//filename:stl_construct.h//Comment by: Gel Cream//e-mail: [Email protected]//Blog:http://blog.csdn.net/mdl13412/* * Copyright (c) 1994 * Hewlett-Packard Company * * Permission to use, copy, modify, distribute and sell this software *  and its documentation for any purpose are hereby granted without fee, * provided that the above copyright notice appear in  All copies and the both that the copyright notice and this permission notice appear * in supporting documentation.  Hewlett-Packard Company makes no * representations on the suitability of this software for any * purpose. It is provided ' as is ' without express or implied warranty. * * * Copyright (c) 1996,1997 * Silicon Graphics Computer Systems, Inc. * Permission to use, copy, modify, distribute an D Sell this software * and it documentation for any purpose be hereby granted without fee, * provided that the above copy Right notice appear in all copies and * so both that the copyright notice and this permission notice appear * in supporting  Documentation. Silicon Graphics makes no * representations about the suitability of this software for aNY * Purpose.  It is provided ' as is ' without express or implied warranty.*//*Note:this is a internal header file, included by other STL headers. * Your should not attempt to use it directly. */#ifndef __sgi_stl_internal_construct_h#define__sgi_stl_internal_construct_h#include<New.h>//need a prototype of placement new__stl_begin_namespace//the destructor of the calling member requires the type to have non-trivial destructorTemplate <classT>inlinevoidDestroy (t*pointer) {pointer->~T ();}//constructs an object on an already allocated memory using placement new//If you are unfamiliar with placement new, please refer to// http://msdn.microsoft.com/en-us/library/kewsb8ba.aspx// http://blogs.msdn.com/b/jaredpar/archive///2007/10/16/c-new-operator-and-placement-new.aspxTemplate <classT1,classT2>inlinevoidConstruct (t1* p,Constt2&value) {  New(p) T1 (value);}//destructors a set of objects for a non-trivial destructorTemplate <classForwarditerator>inlinevoid__destroy_aux (forwarditerator first, ForwardIterator last, __false_type) { for(First < last; + +)First ) Destroy (&*First );}//If there is no type non-trivial destructor, use this functionTemplate <classForwarditerator>inlinevoid__destroy_aux (ForwardIterator, ForwardIterator, __true_type) {}//use the traits technique to determine if the type has non-trivial destructor and then invoke a different functionTemplate <classForwardIterator,classT>inlinevoid__destroy (ForwardIterator First, ForwardIterator last, t*) {typedef typename __type_traits<T>:: Has_trivial_destructor trivial_destructor; __destroy_aux (First, Last, Trivial_destructor ());}//////////////////////////////////////////////////////////////////////////////////used to destroy a group of objects//////////////////////////////////////////////////////////////////////////////////char * Special version//----------destroy not to be destructor//                                               |//destroy (First, last)--------------------------special//                                   | |//                                   | Generalization-----------destroy not to be destructor//                                   | wchar_t * Special Version//↓//Call __destroy (first, Last, Value_type (first));//function forwarding based on whether it has trivial destructor//                                   |//|----------------has trivial destructor?//                                   |//               -------------------------------------------//No | | Yes//               | |//↓↓//__destroy_aux (..., __true_type) __destroy_aux (..., __false_type)//do not enter need to do a destructor operation for (; first < last; ++first)//destroy (&*first);////////////////////////////////////////////////////////////////////////////////Template<classForwarditerator>inlinevoidDestroy (ForwardIterator first, ForwardIterator last) {__destroy (First, Last, Value_type (first));}//Special version ofInlinevoidDestroyChar*,Char*) {}inlinevoidDestroy (wchar_t*, wchar_t*) {}__stl_end_namespace#endif/* __sgi_stl_internal_construct_h *///Local Variables://mode:c++//End:

STL stl_construct.h