mirror of
https://github.com/ENSL/NS.git
synced 2024-11-23 13:02:12 +00:00
f44f16d59a
git-svn-id: https://unknownworlds.svn.cloudforge.com/ns1@168 67975925-1194-0748-b3d5-c16f83f1a3a1
52 lines
No EOL
4.5 KiB
HTML
52 lines
No EOL
4.5 KiB
HTML
<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>STLport: Wrappers Technique</title><link href="doc.css" type="text/css" rel="stylesheet"></head><body marginwidth="0" marginheight="0" leftmargin="0" topmargin="0" vlink="#314A30" link="#314A30" text="black" bgcolor="white"><table border="0" cellspacing="0" cellpadding="0"><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776"><img border="0" height="14" width="1" src="images/trans.gif"><br><a href="../index.html"><img src="images/stl_logo_doc.gif" border="0" height="80" width="80"></a><a href="http://www.stlport.com"><img border="0" height="80" width="461" src="images/t_doc2.gif"></a><br><img src="images/trans.gif" border="0" height="24" width="1"><br><img src="images/black.gif" border="0" height="1" width="776"><br><img src="images/trans.gif" border="0" height="24" width="1"></td></tr><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776"><img src="images/trans.gif" border="0" height="10" width="776"></td></tr><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776">
|
|
|
|
|
|
<span class="heading">Wrapper Technique in STLport</span>
|
|
<p>
|
|
Considerable point of non-portability was the lack of default
|
|
template class parameters in many compilers. C++ template syntax doesn't
|
|
allow an easy way to hide that behind any macro magic.
|
|
<br>STLport uses wrapper technique to work around that:<br>
|
|
Full functionality for <i>'container'</i> is implemented via class <i>'__container__'</i>.
|
|
</p>
|
|
<p>For example:</p>
|
|
<pre><tt>#ifdef _STLP_DEFAULT_TYPE_PARAM
|
|
template <class T, class Alloc = alloc>
|
|
#else
|
|
# define vector __vector
|
|
template <class T, class Alloc>
|
|
#endif
|
|
class vector {
|
|
public:
|
|
......
|
|
#ifdef _STLP_DEFAULT_TYPE_PARAM
|
|
define __vector__ vector
|
|
# else
|
|
template <class T>
|
|
class vector : public __vector__<T,alloc>
|
|
{
|
|
.....
|
|
#define __vector__ __vector
|
|
# endif /* _STLP_DEFAULT_TYPE_PARAM */</tt></pre>
|
|
So, you are provided with two versions of container: with and without
|
|
default parameters. It buys you a way to access full functionality while
|
|
not breaking code using the short notation. <br>
|
|
If you wish to specify the allocator parameter, use <tt>__vector__</tt>.
|
|
For default alloc parameter, use <tt>vector</tt>. <br>
|
|
I would recommend that you <tt>#define</tt> some alias for <tt>__vector__</tt>,
|
|
to be able to switch easily. <br>
|
|
If you don't use different allocators, don't bother.
|
|
<p><b>New in STLport 3.2:</b><br>
|
|
<tt>_STLP_MINIMUM_DEFAULT_TEMPLATE_PARAMS</tt> switch is introduced for user to take control
|
|
of wrappers behavior with classes that have more than one default template argument. With this switch defined,
|
|
STLport will use minimum set of default arguments on template classes that have more than one -
|
|
for example map<>, set<>.
|
|
This is supposed to help compiling existing standard code which use shortest notation.</p>
|
|
|
|
<p>Here is the list of compilers that cannot handle <b>dependant</b>
|
|
default template parameters:<br>
|
|
SunPro CC, BC++ 4.52, VC++ 4.2, xlC 3.1.4, DEC C++ 5.5, Visual Age C++
|
|
3.0.</p>
|
|
|
|
|
|
</td></tr><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776"><img src="images/trans.gif" border="0" height="20" width="50"><br><a href="index.html">Table of Contents</a><br></td></tr><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776"><img src="images/trans.gif" border="0" height="40" width="80"><br><img src="images/black.gif" border="0" height="1" width="776"></td></tr><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776"><img src="images/black.gif" border="0" height="1" width="776"></td></tr><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776"><img src="images/trans.gif" border="0" height="5" width="50"><br><span class="copyright">Copyright 2001 by STLport</span><br><img src="images/trans.gif" border="0" height="50" width="80"></td></tr></table></body></html> |