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| 938a4c0728 |
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array.hpp.html
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array.hpp.html
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<HTML>
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<HEAD>
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<TITLE>array.hpp</TITLE>
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<html>
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<title>array.hpp</title>
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<TABLE HEIGHT=40 WIDTH="100%">
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<TR> <TD ALIGN=LEFT WIDTH="100%" BGCOLOR="#DDDDDD">
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<FONT face="Arial,Helvetica" size=+2><B>
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array.hpp
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</B></FONT>
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</TD></TR></TABLE><BR>
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<table height="40" width="100%">
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<tr>
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<td align="LEFT" width="100%" bgcolor="#DDDDDD"><font face="Arial,Helvetica" size="+2"><b> array.hpp</b></font></td>
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</table>
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<br>
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<br>
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<br>
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<tt><span class="Source"><font color="0000FF">/</font><i><font face="Arial,Helvetica,sans-serif" color="0000FF">* The following code declares class array,</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">* an STL container (as wrapper) for arrays of constant size.</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">*</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">* See</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">* http://www.josuttis.com/cppcode</font></i><br>
|
||||
<i><font face="Arial,Helvetica,sans-serif" color="0000FF">* for details and the latest version.</font></i><br>
|
||||
<i><font face="Arial,Helvetica,sans-serif" color="0000FF">*</font></i><br>
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||||
<i><font face="Arial,Helvetica,sans-serif" color="0000FF">* (C) Copyright Nicolai M. Josuttis 1999.</font></i><br>
|
||||
<i><font face="Arial,Helvetica,sans-serif" color="0000FF">* Permission to copy, use, modify, sell and distribute this software</font></i><br>
|
||||
<i><font face="Arial,Helvetica,sans-serif" color="0000FF">* is granted provided this copyright notice appears in all copies.</font></i><br>
|
||||
<i><font face="Arial,Helvetica,sans-serif" color="0000FF">* This software is provided "as is" without express or implied</font></i><br>
|
||||
<i><font face="Arial,Helvetica,sans-serif" color="0000FF">* warranty, and with no claim as to its suitability for any purpose.</font></i><br>
|
||||
<i><font face="Arial,Helvetica,sans-serif" color="0000FF">*</font></i><br>
|
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">* Jul 31, 2000</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">*/</font></i><br>
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#ifndef BOOST_ARRAY_HPP<br>
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#define BOOST_ARRAY_HPP<br>
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<br>
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#include <cstddef><br>
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#include <stdexcept><br>
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#include <iterator><br>
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#include <algorithm><br>
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<br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// BUG-FIX for compilers that don't support</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// std::size_t and std::ptrdiff_t yet</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// (such as gcc)</font></i><br>
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#include <<a href="../../boost/config.hpp">boost/config.hpp</a>><br>
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<br>
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namespace boost {<br>
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<br>
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template<class T, std::size_t N><br>
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class array {<br>
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public:<br>
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T elems[N]; <i><font face="Arial,Helvetica,sans-serif" color="0000FF">// fixed-size array of elements of type T</font></i><br>
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<br>
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public:<br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// type definitions</font></i><br>
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typedef T value_type;<br>
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typedef T* iterator;<br>
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typedef const T* const_iterator;<br>
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typedef T& reference;<br>
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typedef const T& const_reference;<br>
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typedef std::size_t size_type;<br>
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typedef std::ptrdiff_t difference_type;<br>
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<br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// iterator support</font></i><br>
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iterator begin() { return elems; }<br>
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const_iterator begin() const { return elems; }<br>
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iterator end() { return elems+N; }<br>
|
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const_iterator end() const { return elems+N; }<br>
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<br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// reverse iterator support</font></i><br>
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typedef std::reverse_iterator<iterator> reverse_iterator;<br>
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typedef std::reverse_iterator<const_iterator> const_reverse_iterator;<br>
|
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reverse_iterator rbegin() { return reverse_iterator(end()); }<br>
|
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const_reverse_iterator rbegin() const {<br>
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return const_reverse_iterator(end());<br>
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}<br>
|
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reverse_iterator rend() { return reverse_iterator(begin()); }<br>
|
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const_reverse_iterator rend() const {<br>
|
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return const_reverse_iterator(begin());<br>
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}<br>
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<br>
|
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// operator[]</font></i><br>
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reference operator[](size_type i) { return elems[i]; }<br>
|
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const_reference operator[](size_type i) const { return elems[i]; }<br>
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<br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// at() with range check</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// note: rangecheck() is public because we have implemented array</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// as aggregate, which forbids non-public members</font></i><br>
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void rangecheck (size_type i) const {<br>
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if (i >= size()) { throw std::range_error("array"); }<br>
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}<br>
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reference at(size_type i) { rangecheck(i); return elems[i]; }<br>
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const_reference at(size_type i) const { rangecheck(i); return elems[i]; }<br>
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<br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// front() and back()</font></i><br>
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reference front() { return elems[0]; }<br>
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const_reference front() const { return elems[0]; }<br>
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reference back() { return elems[N-1]; }<br>
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const_reference back() const { return elems[N-1]; }<br>
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<br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// size is constant</font></i><br>
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static size_type size() { return N; }<br>
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static bool empty() { return false; }<br>
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static size_type max_size() { return N; }<br>
|
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enum { static_size = N };<br>
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<br>
|
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// swap (note: linear complexity)</font></i><br>
|
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void swap (array& y) {<br>
|
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std::swap_ranges(begin(),end(),y.begin());<br>
|
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}<br>
|
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<br>
|
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// direct access to data</font></i><br>
|
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const T* data() const { return elems; }<br>
|
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<br>
|
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// assignment with type conversion</font></i><br>
|
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">//template <typename T2></font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">//T& operator= (const array<T2,N>& rhs) {</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// std::copy (begin(),end(),rhs.begin());</font></i><br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">//}</font></i><br>
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};<br>
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<br>
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<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// comparisons</font></i><br>
|
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template<class T, std::size_t N><br>
|
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bool operator== (const array<T,N>& x, const array<T,N>& y) {<br>
|
||||
return std::equal(x.begin(), x.end(), y.begin());<br>
|
||||
}<br>
|
||||
template<class T, std::size_t N><br>
|
||||
bool operator< (const array<T,N>& x, const array<T,N>& y) {<br>
|
||||
return std::lexicographical_compare(x.begin(),x.end(),y.begin(),y.end());<br>
|
||||
}<br>
|
||||
template<class T, std::size_t N><br>
|
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bool operator!= (const array<T,N>& x, const array<T,N>& y) {<br>
|
||||
return !(x==y);<br>
|
||||
}<br>
|
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template<class T, std::size_t N><br>
|
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bool operator> (const array<T,N>& x, const array<T,N>& y) {<br>
|
||||
return y<x;<br>
|
||||
}<br>
|
||||
template<class T, std::size_t N><br>
|
||||
bool operator<= (const array<T,N>& x, const array<T,N>& y) {<br>
|
||||
return !(y<x);<br>
|
||||
}<br>
|
||||
template<class T, std::size_t N><br>
|
||||
bool operator>= (const array<T,N>& x, const array<T,N>& y) {<br>
|
||||
return !(x<y);<br>
|
||||
}<br>
|
||||
<br>
|
||||
<i><font face="Arial,Helvetica,sans-serif" color="0000FF">// global swap()</font></i><br>
|
||||
template<class T, std::size_t N><br>
|
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inline void swap (const array<T,N>& x, const array<T,N>& y) {<br>
|
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x.swap(y);<br>
|
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}<br>
|
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<br>
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} <i><font face="Arial,Helvetica,sans-serif" color="0000FF">/* namespace boost */</font></i><br>
|
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<br>
|
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#endif <i><font face="Arial,Helvetica,sans-serif" color="0000FF">/*BOOST_ARRAY_HPP*/</font></i><br>
|
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</span></tt>
|
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|
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<BR><BR>
|
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<TT>
|
||||
<SPAN class="Source">
|
||||
<Font color="0000FF" >/</FONT><I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* The following code declares class array,</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* an STL container (as wrapper) for arrays of constant size.</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >*</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* See</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* http://www.josuttis.com/cppcode</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* for details and the latest version.</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >*</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* (C) Copyright Nicolai M. Josuttis 1999.</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* Permission to copy, use, modify, sell and distribute this software</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* is granted provided this copyright notice appears in all copies.</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* This software is provided "as is" without express or implied</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* warranty, and with no claim as to its suitability for any purpose.</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >*</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >* Jul 31, 2000</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >*/</FONT></I><BR>
|
||||
#ifndef BOOST_ARRAY_HPP<BR>
|
||||
#define BOOST_ARRAY_HPP<BR>
|
||||
<BR>
|
||||
#include <cstddef><BR>
|
||||
#include <stdexcept><BR>
|
||||
#include <iterator><BR>
|
||||
#include <algorithm><BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// BUG-FIX for compilers that don't support</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// std::size_t and std::ptrdiff_t yet</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// (such as gcc)</FONT></I><BR>
|
||||
#include <<A href="./config.hpp.html">boost/config.hpp</A>><BR>
|
||||
<BR>
|
||||
namespace boost {<BR>
|
||||
<BR>
|
||||
template<class T, std::size_t N><BR>
|
||||
class array {<BR>
|
||||
public:<BR>
|
||||
T elems[N]; <I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// fixed-size array of elements of type T</FONT></I><BR>
|
||||
<BR>
|
||||
public:<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// type definitions</FONT></I><BR>
|
||||
typedef T value_type;<BR>
|
||||
typedef T* iterator;<BR>
|
||||
typedef const T* const_iterator;<BR>
|
||||
typedef T& reference;<BR>
|
||||
typedef const T& const_reference;<BR>
|
||||
typedef std::size_t size_type;<BR>
|
||||
typedef std::ptrdiff_t difference_type;<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// iterator support</FONT></I><BR>
|
||||
iterator begin() { return elems; }<BR>
|
||||
const_iterator begin() const { return elems; }<BR>
|
||||
iterator end() { return elems+N; }<BR>
|
||||
const_iterator end() const { return elems+N; }<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// reverse iterator support</FONT></I><BR>
|
||||
typedef std::reverse_iterator<iterator> reverse_iterator;<BR>
|
||||
typedef std::reverse_iterator<const_iterator> const_reverse_iterator;<BR>
|
||||
reverse_iterator rbegin() { return reverse_iterator(end()); }<BR>
|
||||
const_reverse_iterator rbegin() const {<BR>
|
||||
return const_reverse_iterator(end());<BR>
|
||||
}<BR>
|
||||
reverse_iterator rend() { return reverse_iterator(begin()); }<BR>
|
||||
const_reverse_iterator rend() const {<BR>
|
||||
return const_reverse_iterator(begin());<BR>
|
||||
}<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// operator[]</FONT></I><BR>
|
||||
reference operator[](size_type i) { return elems[i]; }<BR>
|
||||
const_reference operator[](size_type i) const { return elems[i]; }<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// at() with range check</FONT></I><BR>
|
||||
reference at(size_type i) { rangecheck(i); return elems[i]; }<BR>
|
||||
const_reference at(size_type i) const { rangecheck(i); return elems[i]; }<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// front() and back()</FONT></I><BR>
|
||||
reference front() { return elems[0]; }<BR>
|
||||
const_reference front() const { return elems[0]; }<BR>
|
||||
reference back() { return elems[N-1]; }<BR>
|
||||
const_reference back() const { return elems[N-1]; }<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// size is constant</FONT></I><BR>
|
||||
static size_type size() { return N; }<BR>
|
||||
static bool empty() { return false; }<BR>
|
||||
static size_type max_size() { return N; }<BR>
|
||||
enum { static_size = N };<BR>
|
||||
<BR>
|
||||
public:<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// swap (note: linear complexity)</FONT></I><BR>
|
||||
void swap (array<T,N>& y) {<BR>
|
||||
std::swap_ranges(begin(),end(),y.begin());<BR>
|
||||
}<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// direct access to data</FONT></I><BR>
|
||||
const T* data() const { return elems; }<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// assignment with type conversion</FONT></I><BR>
|
||||
template <typename T2><BR>
|
||||
array<T,N>& operator= (const array<T2,N>& rhs) {<BR>
|
||||
std::copy(rhs.begin(),rhs.end(), begin());<BR>
|
||||
return *this;<BR>
|
||||
}<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// assign one value to all elements</FONT></I><BR>
|
||||
void assign (const T& value)<BR>
|
||||
{<BR>
|
||||
std::fill_n(begin(),size(),value);<BR>
|
||||
}<BR>
|
||||
<BR>
|
||||
private:<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// check range (may be private because it is static)</FONT></I><BR>
|
||||
static void rangecheck (size_type i) {<BR>
|
||||
if (i >= size()) { throw std::range_error("array"); }<BR>
|
||||
}<BR>
|
||||
<BR>
|
||||
};<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// comparisons</FONT></I><BR>
|
||||
template<class T, std::size_t N><BR>
|
||||
bool operator== (const array<T,N>& x, const array<T,N>& y) {<BR>
|
||||
return std::equal(x.begin(), x.end(), y.begin());<BR>
|
||||
}<BR>
|
||||
template<class T, std::size_t N><BR>
|
||||
bool operator< (const array<T,N>& x, const array<T,N>& y) {<BR>
|
||||
return std::lexicographical_compare(x.begin(),x.end(),y.begin(),y.end());<BR>
|
||||
}<BR>
|
||||
template<class T, std::size_t N><BR>
|
||||
bool operator!= (const array<T,N>& x, const array<T,N>& y) {<BR>
|
||||
return !(x==y);<BR>
|
||||
}<BR>
|
||||
template<class T, std::size_t N><BR>
|
||||
bool operator> (const array<T,N>& x, const array<T,N>& y) {<BR>
|
||||
return y<x;<BR>
|
||||
}<BR>
|
||||
template<class T, std::size_t N><BR>
|
||||
bool operator<= (const array<T,N>& x, const array<T,N>& y) {<BR>
|
||||
return !(y<x);<BR>
|
||||
}<BR>
|
||||
template<class T, std::size_t N><BR>
|
||||
bool operator>= (const array<T,N>& x, const array<T,N>& y) {<BR>
|
||||
return !(x<y);<BR>
|
||||
}<BR>
|
||||
<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >// global swap()</FONT></I><BR>
|
||||
template<class T, std::size_t N><BR>
|
||||
inline void swap (array<T,N>& x, array<T,N>& y) {<BR>
|
||||
x.swap(y);<BR>
|
||||
}<BR>
|
||||
<BR>
|
||||
} <I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >/* namespace boost */</FONT></I><BR>
|
||||
<BR>
|
||||
#endif <I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >/*BOOST_ARRAY_HPP*/</FONT></I><BR>
|
||||
</SPAN>
|
||||
</TT>
|
||||
</BODY>
|
||||
</HTML>
|
||||
</body>
|
||||
|
||||
</html>
|
||||
|
||||
310
array.htm
Normal file
310
array.htm
Normal file
@ -0,0 +1,310 @@
|
||||
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
|
||||
|
||||
<html>
|
||||
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
<meta name="Keywords" content="array, block, carray, c_array, array wrapper, adapter, adaptor, STL, C++ Standard Library, array.hpp">
|
||||
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
|
||||
<meta name="ProgId" content="FrontPage.Editor.Document">
|
||||
<title>array.hpp, an STL Array Wrapper</title>
|
||||
</head>
|
||||
|
||||
<body text="#000000" bgcolor="#FFFFFF" link="#186ABF">
|
||||
|
||||
<font face="Arial, Helvetica, sans-serif"><img border="0" src="../../c++boost.gif" width="277" height="86"> </font>
|
||||
<table width="100%" height="40">
|
||||
<tr>
|
||||
<td bgcolor="#DDDDDD"><b><font face="Arial,helvetica" color="#000000" size="+1">Class
|
||||
<font face="Courier New, Courier, mono">array</font>, an STL Container (as
|
||||
Wrapper) for Arrays of Constant Size</font></b></td>
|
||||
</tr>
|
||||
</table>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">The C++ Standard Template
|
||||
Library STL as part of the C++ Standard Library provides a framework for
|
||||
processing algorithms on different kind of containers. However, ordinary arrays
|
||||
don't provide the interface of STL containers (although, they provide the
|
||||
iterator interface of STL containers).</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">As replacement for
|
||||
ordinary arrays, the STL provides class <font face="Courier New, Courier, mono">vector<></font>.
|
||||
However, <font face="Courier New, Courier, mono">vector<></font> provides
|
||||
the semantics of dynamic arrays. Thus, it manages data to be able to change the
|
||||
number of elements. This results in some overhead in case only arrays with
|
||||
static size are needed.</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">In his book, <i>Generic
|
||||
Programming and the STL</i>, Matthew H. Austern introduces a useful wrapper
|
||||
class for ordinary arrays with static size, called <font face="Courier New, Courier, mono"><b>block</b></font>.
|
||||
It is safer and has no worse performance than ordinary arrays. In <i>The C++
|
||||
Programming Language</i>, 3rd edition, Bjarne Stroustrup introduces a similar
|
||||
class, called <font face="Courier New, Courier, mono"><b>c_array</b></font>,
|
||||
which I (<a href="http://www.josuttis.com">Nicolai Josuttis</a>) present
|
||||
slightly modified in my book <i>The C++ Standard Library - A Tutorial and
|
||||
Reference</i>, called <font face="Courier New, Courier, mono"><b>carray</b></font>.
|
||||
This is the essence of these approaches spiced with many feedback from <a href="http://www.boost.org">boost</a>.</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">After considering
|
||||
different names, we decided to name this class simply <font face="Courier New, Courier, mono"><b>array</b></font>.</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">The class provides the
|
||||
following interface:</font>
|
||||
<table border="0">
|
||||
<tr>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1"><b>Types:</b></font></td>
|
||||
<td><font size="-1"></font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">value_type</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type of the elements</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">iterator</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type of the iterator
|
||||
(random-access iterator)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">const_iterator</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type of iterator
|
||||
that considers elements as being constant</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">reference</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type of element
|
||||
reference</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">const_reference</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type of element
|
||||
reference that considers elements as being constant</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">size_type</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type for signed size
|
||||
values</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">difference_type</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type for unsigned
|
||||
difference values</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1"><b>Operations:</b></font></td>
|
||||
<td><font size="-1"></font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p><font face="Courier New, Courier, mono" size="-1">array<<i>type</i>,<i>num</i>></font></p>
|
||||
</td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">default constructor,
|
||||
creates array of <i><font face="Courier New, Courier, mono">num</font></i>
|
||||
element of <i><font face="Courier New, Courier, mono">type</font></i>, see
|
||||
comment below</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">array<<i>type</i>,<i>num</i>>(<i>a</i>)</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">copy constructor,
|
||||
copies all elements of <i><font face="Courier New, Courier, mono">a</font></i>
|
||||
(<i><font face="Courier New, Courier, mono">a</font></i> must have same <i><font face="Courier New, Courier, mono">type</font></i><font face="Courier New, Courier, mono"><font face="Arial, Helvetica, sans-serif">
|
||||
and </font></font><i><font face="Courier New, Courier, mono">num</font></i>)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">operator=</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">assignment, assigns
|
||||
all elements</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">begin()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns iterator for
|
||||
the first element</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">end()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns iterator for
|
||||
position after the last element</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">rbegin()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns reverse
|
||||
iterator for position of first element of reverse iteration</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">rend()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns reverse
|
||||
iterator for posistion behind last element of reverese iteration</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">operator[<i>i</i>]</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns element with
|
||||
index <i><font face="Courier New, Courier, mono">i</font></i> (no range
|
||||
checking)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">at(<i>i</i>)</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns element with
|
||||
index <font face="Courier New, Courier, mono"><i>i</i></font> (throw
|
||||
std::range_error if <i><font face="Courier New, Courier, mono">i</font></i>
|
||||
is not valid)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">front()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns first
|
||||
element (caller has to ensure that it exists)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">back()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns last element
|
||||
(caller has to ensure that it exists)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">data()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns raw element
|
||||
array for read-only element access</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">size()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns number of
|
||||
elements</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">empty()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns whether
|
||||
array is empty</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">max_size()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns maximum
|
||||
possible number of elements (same as size())</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">swap(a)</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">swap elements with
|
||||
array a</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">==<font face="Arial, Helvetica, sans-serif">,
|
||||
</font>!=</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">checks for equality</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1"><<font face="Arial, Helvetica, sans-serif">,
|
||||
</font><=<font face="Arial, Helvetica, sans-serif">, </font>><font face="Arial, Helvetica, sans-serif">,
|
||||
</font>>=</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">compares array</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1"><b>Values:</b></font></td>
|
||||
<td> </td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">static_size</font></td>
|
||||
<td><font size="-1" face="Arial, Helvetica, sans-serif">yields size at
|
||||
compile time</font></td>
|
||||
</tr>
|
||||
</table>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">Class array fulfills most
|
||||
but not all of the requirements of "reversible containers" (see
|
||||
Section 23.1, [lib.container.requirements] of the C++ Standard). The reasons
|
||||
array is not an reversible STL container is because:</font><font face="Arial, Helvetica, sans-serif" size="-1"><br>
|
||||
- No constructors are provided<br>
|
||||
- Elements may have an indetermined initial value (see below)<br>
|
||||
- swap() has no constant complexity<br>
|
||||
- size() is always constant, based on the second template argument of the type<br>
|
||||
- The container provides no allocator support</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">It doesn't fulfill the
|
||||
requirements of a "sequence" (see Section 23.1.1, [lib.sequence.reqmts]
|
||||
of the C++ Standard), except that</font><font face="Arial, Helvetica, sans-serif" size="-1"><br>
|
||||
- front() and back() are provided<br>
|
||||
- operator[] and at() are provided</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">Regarding the
|
||||
constructors there was an important design tradeoff: We could implement array as
|
||||
an "<b>aggregate</b>" (see Section 8.5.1, [dcl.init.aggr], of the C++
|
||||
Standard). This would mean:</font></p>
|
||||
<ul>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">An array can be
|
||||
initialized with a brace-enclosing, comma-separated list of initializers for
|
||||
the elements of the container, written in increasing subscript order:</font>
|
||||
<blockquote>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">boost::array<int,4>
|
||||
a = { { 1, 2, 3 } };</font></p>
|
||||
</blockquote>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">Note that if there
|
||||
are fewer elements in the initializer list, then each remaining element gets
|
||||
default-initialized (thus, it has a defined value).</font></p>
|
||||
</li>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">However, <b>passing no
|
||||
initializer list means that the elements have an indetermined initial value</b>.</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">It has no
|
||||
user-declared constructors.</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">It has no private or
|
||||
protected non-static data members.</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">It has no base
|
||||
classes.</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">It has no virtual
|
||||
functions.</font></li>
|
||||
</ul>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">The current
|
||||
implementation useus this approach. However, being able to have indetermined
|
||||
initial values is a big drawback. So, please give me some feedback, how useful
|
||||
you consider this feature to be. This leads to the list of <b>Open issues:</b></font>
|
||||
<ul>
|
||||
<li><font face="Arial, Helvetica, sans-serif">Do we want initializer list
|
||||
support or would the following be OK?:</font>
|
||||
<blockquote>
|
||||
<p><font face="Courier New, Courier, mono">int data[] = { 1, 2, 3, 4 }</font></p>
|
||||
<p><font face="Courier New, Courier, mono">array<int,5> x(data); <font face="Arial, Helvetica, sans-serif">or
|
||||
</font> array<int,data> x;</font></p>
|
||||
</blockquote>
|
||||
</li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">Could "<font face="Courier New, Courier, mono">{
|
||||
</font>...<font face="Courier New, Courier, mono"> }</font>" be used
|
||||
portably instead of "<font face="Courier New, Courier, mono">{ { </font>...<font face="Courier New, Courier, mono">
|
||||
} }</font>" to initialize values?</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">Any way to have determined
|
||||
initial values and initializer list support?</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">Static_casts for reverse
|
||||
iterator stuff?</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">Template assignment operator
|
||||
(how to implement?)</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">assign() member function?</font></li>
|
||||
</ul>
|
||||
<p><font face="Arial, Helvetica, sans-serif">I'd appreciate any constructive <a href="mailto:solutions@josuttis.com">feedback</a>.
|
||||
<b>Please note: I don't have time to read all boost mails. Thus, to make sure
|
||||
that feedback arrives me, please send me a copy of each mail regarding this
|
||||
class.</b></font>
|
||||
<p><font face="Arial, Helvetica, sans-serif">The code is provided "as
|
||||
is" without expressed or implied warranty.</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif"><b>array.hpp</b>, the
|
||||
implementation of <font face="Courier New, Courier, mono">array<></font><b>:</b>
|
||||
</font><font face="Arial, Helvetica, sans-serif"><a href="array.hpp.html">as
|
||||
HTML file</a></font> <font face="Arial, Helvetica, sans-serif"><a href="../../boost/array.hpp">as
|
||||
plain file</a></font>
|
||||
<p><font face="Arial, Helvetica, sans-serif">Simple Example for using <font face="Courier New, Courier, mono">array<><font face="Arial, Helvetica, sans-serif">:</font></font></font>
|
||||
<font face="Arial, Helvetica, sans-serif"><a href="array1.cpp.html">as HTML file</a></font>
|
||||
<font face="Arial, Helvetica, sans-serif"><a href="array1.cpp">as plain file</a></font>
|
||||
<p><font face="Arial, Helvetica, sans-serif">Another Example for using <font face="Courier New, Courier, mono">array<><font face="Arial, Helvetica, sans-serif">:</font></font></font>
|
||||
<font face="Arial, Helvetica, sans-serif"><a href="array2.cpp.html">as HTML file</a></font>
|
||||
<font face="Arial, Helvetica, sans-serif"><a href="array2.cpp">as plain file</a></font>
|
||||
<p><font face="Arial, Helvetica, sans-serif">A third Example for using <font face="Courier New, Courier, mono">array<><font face="Arial, Helvetica, sans-serif">:</font></font></font>
|
||||
<font face="Arial, Helvetica, sans-serif"><a href="array3.cpp.html">as HTML file</a></font>
|
||||
<font face="Arial, Helvetica, sans-serif"><a href="array3.cpp">as plain file</a></font>
|
||||
<p><font face="Arial, Helvetica, sans-serif">An Example for using <font face="Courier New, Courier, mono">array</font>s
|
||||
of <font face="Courier New, Courier, mono">array</font>s<font face="Courier New, Courier, mono"><font face="Arial, Helvetica, sans-serif">:</font></font></font>
|
||||
<font face="Arial, Helvetica, sans-serif"><a href="array4.cpp.html">as HTML file</a></font>
|
||||
<font face="Arial, Helvetica, sans-serif"><a href="array4.cpp">as plain file</a></font>
|
||||
<p><font face="Arial, Helvetica, sans-serif">An Example for testing other
|
||||
operations of <font face="Courier New, Courier, mono">array<></font><font face="Courier New, Courier, mono"><font face="Arial, Helvetica, sans-serif">:</font></font></font>
|
||||
<font face="Arial, Helvetica, sans-serif"><a href="array5.cpp.html">as HTML file</a></font>
|
||||
<font face="Arial, Helvetica, sans-serif"><a href="array5.cpp">as plain file</a></font>
|
||||
<p><font face="Arial, Helvetica, sans-serif">To find more details about using
|
||||
ordinary arrays in C++ and the framework of the STL, see e.g.</font><font face="Arial, Helvetica, sans-serif"><br>
|
||||
<i> <a href="http://www.josuttis.com/libbook/">The C++
|
||||
Standard Library - A Tutorial and Reference</a></i><br>
|
||||
by <a href="http://www.josuttis.com" target="_top">Nicolai
|
||||
M. Josuttis</a></font><font face="Arial, Helvetica, sans-serif"><br>
|
||||
Addison Wesley Longman, 1999</font><font face="Arial, Helvetica, sans-serif"><br>
|
||||
ISBN 0-201-37926-0</font><font face="Arial, Helvetica, sans-serif"><br>
|
||||
</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif"><a href="http://www.josuttis.com/" target="_top">Home
|
||||
Page of Nicolai Josuttis</a></font><font face="Arial, Helvetica, sans-serif"><br>
|
||||
</font>
|
||||
|
||||
</body>
|
||||
|
||||
</html>
|
||||
320
array.html
320
array.html
@ -1,320 +0,0 @@
|
||||
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
||||
<meta name="Keywords" content="array, block, carray, c_array, array wrapper, adapter, adaptor, STL, C++ Standard Library, array.hpp">
|
||||
|
||||
<title>array.hpp, an STL Array Wrapper</title>
|
||||
</head>
|
||||
<body text="#000000" bgcolor="#FFFFFF" link="#186ABF">
|
||||
<font face="Arial, Helvetica, sans-serif"> </font>
|
||||
<table width="100%" height="40">
|
||||
<tr>
|
||||
<td BGCOLOR="#DDDDDD"><b><font face="Arial,helvetica" color="#000000" size="+1">Class
|
||||
<font face="Courier New, Courier, mono">array</font>, an STL Container (as
|
||||
Wrapper) for Arrays of Constant Size</font></b></td>
|
||||
</tr>
|
||||
</table>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">The C++ Standard Template
|
||||
Library STL as part of the C++ Standard Library provides a framework for processing
|
||||
algorithms on different kind of containers. However, ordinary arrays don't provide
|
||||
the interface of STL containers (although, they provide the iterator interface
|
||||
of STL containers).</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">As replacement for ordinary
|
||||
arrays, the STL provides class <font face="Courier New, Courier, mono">vector<></font>.
|
||||
However, <font face="Courier New, Courier, mono">vector<></font> provides
|
||||
the semantics of dynamic arrays. Thus, it manages data to be able to change
|
||||
the number of elements. This results in some overhead in case only arrays with
|
||||
static size are needed.</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">In his book, <i>Generic
|
||||
Programming and the STL</i>, Matthew H. Austern introduces a useful wrapper
|
||||
class for ordinary arrays with static size, called <font face="Courier New, Courier, mono"><b>block</b></font>.
|
||||
It is safer and has no worse performance than ordinary arrays. In <i>The C++
|
||||
Programming Language</i>, 3rd edition, Bjarne Stroustrup introduces a similar
|
||||
class, called <font face="Courier New, Courier, mono"><b>c_array</b></font>,
|
||||
which I (<a href="http://www.josuttis.com">Nicolai Josuttis</a>) present slightly
|
||||
modified in my book <i>The C++ Standard Library - A Tutorial and Reference</i>,
|
||||
called <font face="Courier New, Courier, mono"><b>carray</b></font>. This is
|
||||
the essence of these approaches spiced with many feedback from <a href="http://www.boost.org">boost</a>.</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">After considering different
|
||||
names, we decided to name this class simply <font face="Courier New, Courier, mono"><b>array</b></font>.</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">The class provides the
|
||||
following interface:</font>
|
||||
<table border="0">
|
||||
<tr>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1"><b>Types:</b></font></td>
|
||||
<td><font size="-1"></font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">value_type</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type of the elements</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">iterator</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type of the iterator
|
||||
(random-access iterator)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">const_iterator</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type of iterator that
|
||||
considers elements as being constant</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">reference</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type of element reference</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">const_reference</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type of element reference
|
||||
that considers elements as being constant</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">size_type</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type for signed size
|
||||
values</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">difference_type</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">type for unsigned
|
||||
difference values</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1"><b>Operations:</b></font></td>
|
||||
<td><font size="-1"></font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>
|
||||
<p><font face="Courier New, Courier, mono" size="-1">array<<i>type</i>,<i>num</i>></font></p>
|
||||
</td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">default constructor,
|
||||
creates array of <i><font face="Courier New, Courier, mono">num</font></i>
|
||||
element of <i><font face="Courier New, Courier, mono">type</font></i>, see
|
||||
comment below</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">array<<i>type</i>,<i>num</i>>(<i>a</i>)</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">copy constructor,
|
||||
copies all elements of <i><font face="Courier New, Courier, mono">a</font></i>
|
||||
(<i><font face="Courier New, Courier, mono">a</font></i> must have same
|
||||
<i> <font face="Courier New, Courier, mono">type</font></i><font face="Courier New, Courier, mono"><font face="Arial, Helvetica, sans-serif">
|
||||
and </font></font><i><font face="Courier New, Courier, mono">num</font></i>)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">operator=</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">assignment, assigns
|
||||
all elements</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">assign(<i>val</i>)</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">assigns <i>val</i>
|
||||
to all elements</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">begin()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns iterator for
|
||||
the first element</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">end()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns iterator for
|
||||
position after the last element</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">rbegin()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns reverse iterator
|
||||
for position of first element of reverse iteration</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">rend()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns reverse iterator
|
||||
for posistion behind last element of reverese iteration </font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">operator[<i>i</i>]</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns element with
|
||||
index <i><font face="Courier New, Courier, mono">i</font></i> (no range
|
||||
checking)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">at(<i>i</i>)</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns element with
|
||||
index <font face="Courier New, Courier, mono"><i>i</i></font> (throw std::range_error
|
||||
if <i><font face="Courier New, Courier, mono">i</font></i> is not valid)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">front()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns first element
|
||||
(caller has to ensure that it exists)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">back()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns last element
|
||||
(caller has to ensure that it exists)</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">data()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns raw element
|
||||
array for read-only element access</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">size()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns number of
|
||||
elements</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">empty()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns whether array
|
||||
is empty</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">max_size()</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">returns maximum possible
|
||||
number of elements (same as size())</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">swap(a)</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">swap elements with
|
||||
array a</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">==<font face="Arial, Helvetica, sans-serif">,
|
||||
</font>!=</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">checks for equality</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1"><<font face="Arial, Helvetica, sans-serif">,
|
||||
</font><=<font face="Arial, Helvetica, sans-serif">, </font>><font face="Arial, Helvetica, sans-serif">,
|
||||
</font>>=</font></td>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1">compares array</font></td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Arial, Helvetica, sans-serif" size="-1"><b>Values:</b></font></td>
|
||||
<td> </td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td><font face="Courier New, Courier, mono" size="-1">static_size</font></td>
|
||||
<td><font size="-1" face="Arial, Helvetica, sans-serif">yields size at compile
|
||||
time</font></td>
|
||||
</tr>
|
||||
</table>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">Class array fulfills most
|
||||
but not all of the requirements of "reversible containers" (see Section
|
||||
23.1, [lib.container.requirements] of the C++ Standard). The reasons array is
|
||||
not an reversible STL container is because: </font> <font face="Arial, Helvetica, sans-serif" size="-1"><br>
|
||||
- No constructors are provided<br>
|
||||
- Elements may have an indetermined initial value (see below)<br>
|
||||
- swap() has no constant complexity<br>
|
||||
- size() is always constant, based on the second template argument of the type<br>
|
||||
- The container provides no allocator support</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">It doesn't fulfill the
|
||||
requirements of a "sequence" (see Section 23.1.1, [lib.sequence.reqmts]
|
||||
of the C++ Standard), except that</font> <font face="Arial, Helvetica, sans-serif" size="-1"><br>
|
||||
- front() and back() are provided<br>
|
||||
- operator[] and at() are provided</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">Regarding the constructors
|
||||
there was an important design tradeoff: We could implement array as an "<b>aggregate</b>"
|
||||
(see Section 8.5.1, [dcl.init.aggr], of the C++ Standard). This would mean:</font></p>
|
||||
<ul>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">An array can be initialized
|
||||
with a brace-enclosing, comma-separated list of initializers for the elements
|
||||
of the container, written in increasing subscript order:</font>
|
||||
<blockquote>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">boost::array<int,4>
|
||||
a = { { 1, 2, 3 } };</font></p>
|
||||
</blockquote>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">Note that if there
|
||||
are fewer elements in the initializer list, then each remaining element
|
||||
gets default-initialized (thus, it has a defined value).</font></p>
|
||||
</li>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">However, <b>passing
|
||||
no initializer list means that the elements have an indetermined initial value</b>.</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">It has no user-declared
|
||||
constructors.</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">It has no private or
|
||||
protected non-static data members.</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">It has no base classes.</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif" size="-1">It has no virtual functions.</font></li>
|
||||
</ul>
|
||||
<p><font face="Arial, Helvetica, sans-serif" size="-1">The current implementation
|
||||
useus this approach. However, being able to have indetermined initial values
|
||||
is a big drawback. So, please give me some feedback, how useful you consider
|
||||
this feature to be. This leads to the list of <b>Open issues:</b></font>
|
||||
<ul>
|
||||
<li><font face="Arial, Helvetica, sans-serif">Do we want initializer list support
|
||||
or would the following be OK?:</font>
|
||||
<blockquote>
|
||||
<p><font face="Courier New, Courier, mono">int data[] = { 1, 2, 3, 4 }</font></p>
|
||||
<p><font face="Courier New, Courier, mono">array<int,5> x(data); <font face="Arial, Helvetica, sans-serif">or
|
||||
</font> array<int,data> x;</font></p>
|
||||
</blockquote>
|
||||
</li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">Could "<font face="Courier New, Courier, mono">{
|
||||
</font>...<font face="Courier New, Courier, mono"> }</font>" be used
|
||||
portably instead of "<font face="Courier New, Courier, mono">{ { </font>...<font face="Courier New, Courier, mono">
|
||||
} }</font>" to initialize values?</font> </li>
|
||||
<blockquote>
|
||||
<p><font face="Arial, Helvetica, sans-serif">8.5.1 (11) of the Standard seem
|
||||
to allow it; however, gcc 2.95.2 printa warning message.</font></p>
|
||||
</blockquote>
|
||||
<li><font face="Arial, Helvetica, sans-serif">Any way to have determined initial
|
||||
values and initializer list support?</font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">Static_casts for reverse iterator
|
||||
stuff</font><font face="Arial, Helvetica, sans-serif">?</font></li>
|
||||
</ul>
|
||||
<p><font face="Arial, Helvetica, sans-serif">I'd appreciate any constructive <a href="mailto:solutions@josuttis.com">feedback</a>.
|
||||
<b>Please note: I don't have time to read all boost mails. Thus, to make sure
|
||||
that feedback arrives me, please send me a copy of each mail regarding this
|
||||
class.</b></font>
|
||||
<p><font face="Arial, Helvetica, sans-serif">The code is provided "as is" without
|
||||
expressed or implied warranty.</font>
|
||||
<p><font face="Arial, Helvetica, sans-serif"><b>array.hpp</b>, the implementation
|
||||
of <font face="Courier New, Courier, mono">array<></font><b>:</b> </font>
|
||||
<li><font face="Arial, Helvetica, sans-serif">
|
||||
<a href="array.hpp.html">as HTML file</a></font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">
|
||||
<a href="array.hpp">as plain file</a></font></li>
|
||||
<p> <font face="Arial, Helvetica, sans-serif">Simple Example for using <font face="Courier New, Courier, mono">array<><font face="Arial, Helvetica, sans-serif">:</font></font></font>
|
||||
<li><font face="Arial, Helvetica, sans-serif">
|
||||
<a href="array1.cpp.html">as HTML file</a></font> </li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">
|
||||
<a href="array1.cpp">as plain file</a></font></li>
|
||||
<p> <font face="Arial, Helvetica, sans-serif">Another Example for using <font face="Courier New, Courier, mono">array<><font face="Arial, Helvetica, sans-serif">:</font></font></font>
|
||||
<li><font face="Arial, Helvetica, sans-serif">
|
||||
<a href="array2.cpp.html">as HTML file</a></font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">
|
||||
<a href="array2.cpp">as plain file</a></font></li>
|
||||
<p> <font face="Arial, Helvetica, sans-serif">A third Example for using <font face="Courier New, Courier, mono">array<><font face="Arial, Helvetica, sans-serif">:</font></font></font>
|
||||
<li><font face="Arial, Helvetica, sans-serif">
|
||||
<a href="array3.cpp.html">as HTML file</a></font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif">
|
||||
<a href="array3.cpp">as plain file</a></font></li>
|
||||
<p> <font face="Arial, Helvetica, sans-serif">An Example for using <font face="Courier New, Courier, mono">array</font>s
|
||||
of <font face="Courier New, Courier, mono">array</font>s<font face="Courier New, Courier, mono"><font face="Arial, Helvetica, sans-serif">:</font></font></font>
|
||||
<li><font face="Arial, Helvetica, sans-serif"> <a href="array4.cpp.html">as HTML
|
||||
file</a></font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif"> <a href="array4.cpp">as plain file</a></font></li>
|
||||
<p><font face="Arial, Helvetica, sans-serif">An Example for testing other operations
|
||||
of <font face="Courier New, Courier, mono">array<></font><font face="Courier New, Courier, mono"><font face="Arial, Helvetica, sans-serif">:</font></font></font>
|
||||
<li><font face="Arial, Helvetica, sans-serif"> <a href="array5.cpp.html">as HTML
|
||||
file</a></font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif"> <a href="array5.cpp">as plain file</a></font></li>
|
||||
<p><b><font face="Arial, Helvetica, sans-serif">All files</font></b>
|
||||
<li><font face="Arial, Helvetica, sans-serif"> <a href="array.zip">as ZIP file
|
||||
(24KB)</a></font></li>
|
||||
<li><font face="Arial, Helvetica, sans-serif"> <a href="array.tgz">as TGZ file
|
||||
(13KB)</a><br>
|
||||
<br>
|
||||
To find more details about using ordinary arrays in C++ and the framework of
|
||||
the STL, see e.g.</font> <font face="Arial, Helvetica, sans-serif"><br>
|
||||
<i> <a href="http://www.josuttis.com/libbook/">The C++
|
||||
Standard Library - A Tutorial and Reference</a></i> <br>
|
||||
by <a href="http://www.josuttis.com" target="_top">Nicolai
|
||||
M. Josuttis</a></font> <font face="Arial, Helvetica, sans-serif"><br>
|
||||
Addison Wesley Longman, 1999</font> <font face="Arial, Helvetica, sans-serif"><br>
|
||||
ISBN 0-201-37926-0</font> <font face="Arial, Helvetica, sans-serif"><br>
|
||||
</font></li>
|
||||
<p><font face="Arial, Helvetica, sans-serif"><a href="http://www.josuttis.com/" TARGET="_top">Home
|
||||
Page of Nicolai Josuttis</a></font> <font face="Arial, Helvetica, sans-serif"><br>
|
||||
</font>
|
||||
</body>
|
||||
</html>
|
||||
11
array5.cpp
11
array5.cpp
@ -54,11 +54,10 @@ int main()
|
||||
<< std::endl;
|
||||
}
|
||||
|
||||
typedef boost::array<double,6> DArray;
|
||||
typedef boost::array<int,6> IArray;
|
||||
IArray ia = { 1, 2, 3, 4, 5, 6 };
|
||||
DArray da;
|
||||
da = ia;
|
||||
da.assign(42);
|
||||
//typedef boost::array<double,6> DArray;
|
||||
//typedef boost::array<int,6> IArray;
|
||||
//IArray ia = { { 1, 2, 3, 4, 5, 6 } };
|
||||
//DArray da;
|
||||
//da.assign(ia);
|
||||
}
|
||||
|
||||
|
||||
@ -71,12 +71,11 @@ int main()<BR>
|
||||
<< std::endl;<BR>
|
||||
}<BR>
|
||||
<BR>
|
||||
typedef boost::array<double,6> DArray;<BR>
|
||||
typedef boost::array<int,6> IArray;<BR>
|
||||
IArray ia = { 1, 2, 3, 4, 5, 6 };<BR>
|
||||
DArray da;<BR>
|
||||
da = ia;<BR>
|
||||
da.assign(42);<BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >//typedef boost::array<double,6> DArray;</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >//typedef boost::array<int,6> IArray;</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >//IArray ia = { { 1, 2, 3, 4, 5, 6 } };</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >//DArray da;</FONT></I><BR>
|
||||
<I><FONT face="Arial,Helvetica,sans-serif" color="0000FF" >//da.assign(ia);</FONT></I><BR>
|
||||
}<BR>
|
||||
<BR>
|
||||
</SPAN>
|
||||
|
||||
@ -21,10 +21,7 @@
|
||||
#include <iterator>
|
||||
#include <algorithm>
|
||||
|
||||
// BUG-FIX for compilers that don't support
|
||||
// std::size_t and std::ptrdiff_t yet
|
||||
// (such as gcc)
|
||||
#include <boost/config.hpp>
|
||||
#include <boost/config.hpp> // for std::size_t and std::ptrdiff_t workarounds
|
||||
|
||||
namespace boost {
|
||||
|
||||
@ -48,17 +45,10 @@ namespace boost {
|
||||
const_iterator begin() const { return elems; }
|
||||
iterator end() { return elems+N; }
|
||||
const_iterator end() const { return elems+N; }
|
||||
|
||||
|
||||
// reverse iterator support
|
||||
# if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
||||
typedef std::reverse_iterator<iterator> reverse_iterator;
|
||||
typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
|
||||
# else
|
||||
// workaround for broken reverse_iterator implementations due to no partial specialization
|
||||
typedef std::reverse_iterator<iterator,T> reverse_iterator;
|
||||
typedef std::reverse_iterator<const_iterator,T> const_reverse_iterator;
|
||||
# endif
|
||||
|
||||
reverse_iterator rbegin() { return reverse_iterator(end()); }
|
||||
const_reverse_iterator rbegin() const {
|
||||
return const_reverse_iterator(end());
|
||||
@ -73,6 +63,11 @@ namespace boost {
|
||||
const_reference operator[](size_type i) const { return elems[i]; }
|
||||
|
||||
// at() with range check
|
||||
// note: rangecheck() is public because we have implemented array
|
||||
// as aggregate, which forbids non-public members
|
||||
void rangecheck (size_type i) const {
|
||||
if (i >= size()) { throw std::range_error("array"); }
|
||||
}
|
||||
reference at(size_type i) { rangecheck(i); return elems[i]; }
|
||||
const_reference at(size_type i) const { rangecheck(i); return elems[i]; }
|
||||
|
||||
@ -88,9 +83,8 @@ namespace boost {
|
||||
static size_type max_size() { return N; }
|
||||
enum { static_size = N };
|
||||
|
||||
public:
|
||||
// swap (note: linear complexity)
|
||||
void swap (array<T,N>& y) {
|
||||
void swap (array& y) {
|
||||
std::swap_ranges(begin(),end(),y.begin());
|
||||
}
|
||||
|
||||
@ -98,26 +92,10 @@ namespace boost {
|
||||
const T* data() const { return elems; }
|
||||
|
||||
// assignment with type conversion
|
||||
template <typename T2>
|
||||
array<T,N>& operator= (const array<T2,N>& rhs) {
|
||||
std::copy(rhs.begin(),rhs.end(), begin());
|
||||
return *this;
|
||||
}
|
||||
|
||||
// assign one value to all elements
|
||||
void assign (const T& value)
|
||||
{
|
||||
std::fill_n(begin(),size(),value);
|
||||
}
|
||||
|
||||
# ifndef BOOST_NO_PRIVATE_IN_AGGREGATE
|
||||
private:
|
||||
# endif
|
||||
// private member functions are allowed in aggregates [ISO 8.5.1]
|
||||
static void rangecheck (size_type i) {
|
||||
if (i >= size()) { throw std::range_error("array"); }
|
||||
}
|
||||
|
||||
//template <typename T2>
|
||||
//T& operator= (const array<T2,N>& rhs) {
|
||||
// std::copy (begin(),end(),rhs.begin());
|
||||
//}
|
||||
};
|
||||
|
||||
// comparisons
|
||||
@ -148,7 +126,7 @@ namespace boost {
|
||||
|
||||
// global swap()
|
||||
template<class T, std::size_t N>
|
||||
inline void swap (array<T,N>& x, array<T,N>& y) {
|
||||
inline void swap (const array<T,N>& x, const array<T,N>& y) {
|
||||
x.swap(y);
|
||||
}
|
||||
|
||||
|
||||
36
index.htm
36
index.htm
@ -1,36 +0,0 @@
|
||||
<html>
|
||||
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
|
||||
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
|
||||
<meta name="ProgId" content="FrontPage.Editor.Document">
|
||||
<title>Array Wrapper Libary</title>
|
||||
</head>
|
||||
|
||||
<body bgcolor="#FFFFFF" text="#000000">
|
||||
|
||||
<table border="1" bgcolor="#007F7F" cellpadding="2">
|
||||
<tr>
|
||||
<td bgcolor="#FFFFFF"><img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" width="277" height="86"></td>
|
||||
<td><a href="../../index.htm"><font face="Arial" color="#FFFFFF"><big>Home</big></font></a></td>
|
||||
<td><a href="../../libraries.htm"><font face="Arial" color="#FFFFFF"><big>Libraries</big></font></a></td>
|
||||
<td><a href="../../people.htm"><font face="Arial" color="#FFFFFF"><big>People</big></font></a></td>
|
||||
<td><a href="../../more/faq.htm"><font face="Arial" color="#FFFFFF"><big>FAQ</big></font></a></td>
|
||||
<td><a href="../../more/index.htm"><font face="Arial" color="#FFFFFF"><big>More</big></font></a></td>
|
||||
</tr>
|
||||
</table>
|
||||
<h1>Array wrapper library</h1>
|
||||
<p>The header array.hpp provides an STL compliant container wrapper for arrays
|
||||
of constant size.
|
||||
<ul>
|
||||
<li><a href="array.htm">Documentation</a> (HTML).</li>
|
||||
<li>Header <a href="../../boost/array.hpp">array.hpp</a></li>
|
||||
<li>See docs for links to example programs.</li>
|
||||
<li>Download <a href="../../boost_all.zip">all of Boost</a> (ZIP format).</li>
|
||||
<li>Submitted by <a href="http://www.josuttis.com">Nicolai M. Josuttis</a>.</li>
|
||||
</ul>
|
||||
<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %b %Y" startspan -->02 Aug 2000<!--webbot bot="Timestamp" endspan i-checksum="14748" --></p>
|
||||
|
||||
</body>
|
||||
|
||||
</html>
|
||||
28
print.hpp
28
print.hpp
@ -1,28 +0,0 @@
|
||||
/* The following code example is taken from the book
|
||||
* "The C++ Standard Library - A Tutorial and Reference"
|
||||
* by Nicolai M. Josuttis, Addison-Wesley, 1999
|
||||
*
|
||||
* (C) Copyright Nicolai M. Josuttis 1999.
|
||||
* Permission to copy, use, modify, sell and distribute this software
|
||||
* is granted provided this copyright notice appears in all copies.
|
||||
* This software is provided "as is" without express or implied
|
||||
* warranty, and with no claim as to its suitability for any purpose.
|
||||
*/
|
||||
#include <iostream>
|
||||
|
||||
/* PRINT_ELEMENTS()
|
||||
* - prints optional C-string optcstr followed by
|
||||
* - all elements of the collection coll
|
||||
* - separated by spaces
|
||||
*/
|
||||
template <class T>
|
||||
inline void PRINT_ELEMENTS (const T& coll, const char* optcstr="")
|
||||
{
|
||||
typename T::const_iterator pos;
|
||||
|
||||
std::cout << optcstr;
|
||||
for (pos=coll.begin(); pos!=coll.end(); ++pos) {
|
||||
std::cout << *pos << ' ';
|
||||
}
|
||||
std::cout << std::endl;
|
||||
}
|
||||
Reference in New Issue
Block a user