Subject: [Boost-commit] svn:boost r60168 - sandbox/statistics/detail/assign/boost/assign/auto_size/array
From: erwann.rogard_at_[hidden]
Date: 2010-03-04 22:42:54
Author: e_r
Date: 2010-03-04 22:42:54 EST (Thu, 04 Mar 2010)
New Revision: 60168
URL: http://svn.boost.org/trac/boost/changeset/60168
Log:
m
Added:
sandbox/statistics/detail/assign/boost/assign/auto_size/array/lazy.hpp
- copied unchanged from r60165, /sandbox/statistics/detail/assign/boost/assign/auto_size/array/policy.hpp
Removed:
sandbox/statistics/detail/assign/boost/assign/auto_size/array/policy.hpp
Deleted: sandbox/statistics/detail/assign/boost/assign/auto_size/array/policy.hpp
==============================================================================
--- sandbox/statistics/detail/assign/boost/assign/auto_size/array/policy.hpp 2010-03-04 22:42:54 EST (Thu, 04 Mar 2010)
+++ (empty file)
@@ -1,101 +0,0 @@
-//////////////////////////////////////////////////////////////////////////////
-// assign::detail::array::policy.hpp //
-// //
-// (C) Copyright 2010 Erwann Rogard //
-// Use, modification and distribution are subject to the //
-// Boost Software License, Version 1.0. (See accompanying file //
-// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) //
-//////////////////////////////////////////////////////////////////////////////
-#ifndef BOOST_ASSIGN_AUTO_SIZE_DETAIL_ARRAY_POLICY_ER_2010_HPP
-#define BOOST_ASSIGN_AUTO_SIZE_DETAIL_ARRAY_POLICY_ER_2010_HPP
-#include <boost/shared_ptr.hpp>
-#include <boost/assign/auto_size/array/interface.hpp>
-#include <boost/assign/auto_size/array/ref.hpp>
-#include <boost/assign/auto_size/detail/policy.hpp>
-
-namespace boost{
-namespace assign{
-namespace detail{
-namespace auto_size{
-
- // tag::lazy_array designates a policy for auto_size::expr<>, that has the
- // functionality of array_interface<>, and postones allocation until it is
- // necessary. It is therefore suitable as the result of statements such as:
- // fun(a)(b)(c);
-
- namespace tag{
- struct lazy_array{};
- }
-
- template<typename T,int N,template<typename> class Ref,typename D>
- class lazy_array;
-
- template<typename E> struct expr_size;
- template<typename E> struct expr_elem;
-
- template<>
- struct policy<tag::lazy_array>
- {
- template<typename E,template<typename> class Ref>
- struct apply{
- typedef typename expr_size<E>::type size_;
- typedef typename expr_elem<E>::type elem_;
- typedef lazy_array<elem_,size_::value,Ref,E> type;
- };
- };
-
- template<
- typename E,typename T,int N,template<typename> class Ref,typename P
- >
- class expr;
-
- template<typename A,typename E,typename T,int N,
- template<typename> class Ref,typename P>
- void write_to_array(A& a,const expr<E,T,N,Ref,P>& e);
-
- // Policy for the collection builder, auto_size::expr<>, that exposes an
- // array interface
- template<typename T,int N,template<typename> class Ref,typename D>
- class lazy_array
- : public array_interface<T,N,Ref,lazy_array<T,N,Ref,D> >
- {
-
- typedef typename auto_size::ref_array<T,N,Ref>::type ref_array_;
-
- void alloc_if()const{
- if(!this->ptr){
- return this->alloc();
- }
- }
-
- void alloc()const{
- this->ptr = smart_ptr_(new ref_array_);
- write_to_array(*this->ptr,static_cast<const D&>(*this));
- }
-
- public:
-
- ref_array_& ref_array_impl(){
- this->alloc_if();
- return (*this->ptr);
- }
-
- const ref_array_& ref_array_impl()const{
- this->alloc_if();
- return (*this->ptr);
- }
-
- private:
- typedef boost::shared_ptr<ref_array_> smart_ptr_;
- // Only the last of N expressions needs to instantiate an array,
- // hence a pointer.
- mutable smart_ptr_ ptr;
-
- };
-
-}// auto_size
-}// detail
-}// assign
-}// boost
-
-#endif