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[SVN r7621]
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Beman Dawes
2000-07-07 16:04:40 +00:00
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// -*-C++-*- array.hpp
// <!!---------------------------------------------------------------------->
// <!! Copyright (C) 1998 Dietmar Kuehl, Claas Solutions GmbH >
// <!!>
// <!! Permission to use, copy, modify, distribute and sell this >
// <!! software for any purpose is hereby granted without fee, provided >
// <!! that the above copyright notice appears in all copies and that >
// <!! both that copyright notice and this permission notice appear in >
// <!! supporting documentation. Dietmar Kuehl and Claas Solutions make no >
// <!! representations about the suitability of this software for any >
// <!! purpose. It is provided "as is" without express or implied warranty. >
// <!!---------------------------------------------------------------------->
// Author: Dietmar Kuehl dietmar.kuehl@claas-solutions.de
// Title: STL container support, including support for built-in arrays
// Version: $Id$
// --------------------------------------------------------------------------
#if !defined(BOOST_ARRAY_HPP)
#define BOOST_ARRAY_HPP 1
// --------------------------------------------------------------------------
#include <cstddef>
// --------------------------------------------------------------------------
namespace boost
{
// --- a general version of container traits ------------------------------
template <typename Cont>
struct array_traits
{
typedef typename Cont::iterator iter_type;
typedef typename Cont::size_type size_type;
static iter_type begin(Cont &cont) { return cont.begin(); }
static iter_type end(Cont &cont) { return cont.end(); }
static size_type size(Cont &cont) { return cont.size(); }
};
// --- a version of container traits for constant constainer --------------
template <typename Cont>
struct array_traits<Cont const>
{
typedef typename Cont::const_iterator iter_type;
typedef typename Cont::size_type size_type;
static iter_type begin(Cont const &cont) { return cont.begin(); }
static iter_type end(Cont const &cont) { return cont.end(); }
static size_type size(Cont const &cont) { return cont.size(); }
};
// --- a special version for non-const built-in arrays --------------------
template <typename T, size_t sz>
struct array_traits<T[sz]>
{
typedef T* iter_type;
typedef size_t size_type;
static iter_type begin(T (&array)[sz]) { return array; }
static iter_type end(T (&array)[sz]) { return array + sz; }
static size_type size(T (&)[sz]) { return sz; }
};
// --- a special version for const built-in arrays ------------------------
template <typename T, size_t sz>
struct array_traits<T const[sz]>
{
typedef T const* iter_type;
typedef size_t size_type;
static iter_type begin(T const (&array)[sz]) { return array; }
static iter_type end(T const (&array)[sz]) { return array + sz; }
static size_type size(T const (&array)[sz]) { return sz; }
};
template <typename T, int sz>
inline char (&sizer(T (&)[sz]))[sz];
// --- general version of the global accessor functions ---------------------
template <typename Cont>
inline typename array_traits<Cont>::iter_type
begin(Cont &cont) { return array_traits<Cont>::begin(cont); }
template <typename Cont>
inline typename array_traits<Cont>::iter_type
end(Cont &cont) { return array_traits<Cont>::end(cont); }
template <typename Cont>
inline typename array_traits<Cont>::size_type
size(Cont &cont) { return array_traits<Cont>::size(cont); }
// --- Actually the above should be sufficient but compilers seem -----------
// --- to welcome some help. So here we go:
template <typename T, size_t sz>
inline typename array_traits<T[sz]>::iter_type
begin(T (&a)[sz]) { return array_traits<T[sz]>::begin(a); }
template <typename T, size_t sz>
inline typename array_traits<T[sz]>::iter_type
end(T (&a)[sz]) { return array_traits<T[sz]>::end(a); }
template <typename T, size_t sz>
inline typename array_traits<T[sz]>::size_type
size(T (&a)[sz]) { return array_traits<T[sz]>::size(a); }
// --- Apparently the compilers also need some specific help, ---------------
// --- EDG-2.39 wants to pass around pointers in some contexts --------------
#ifdef __EDG__
template <typename T>
struct array_traits<T*>
{
typedef T* iter_type;
typedef size_t size_type;
};
#endif
// --- egcs-1998-11-22 apparently likes an extra const version: -------------
#ifdef __GNUG__
template <typename T, size_t sz>
inline typename array_traits<T const[sz]>::iter_type
begin(T const(&a)[sz]) { return array_traits<T const[sz]>::begin(a); }
template <typename T, size_t sz>
inline typename array_traits<T const[sz]>::iter_type
end(T const(&a)[sz]) { return array_traits<T const[sz]>::end(a); }
template <typename T, size_t sz>
inline typename array_traits<T const[sz]>::size_type
size(T const (&a)[sz]) { return array_traits<T const[sz]>::size(a); }
#endif
}
// -----------------------------------------------------------------------------
#endif /* BOOST_ARRAY_HPP */