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<HTML><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><!-- Created on September, 12 2004 by texi2html 1.64 --><!-- Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author) Karl Berry <karl@freefriends.org> Olaf Bachmann <obachman@mathematik.uni-kl.de> and many others.Maintained by: Olaf Bachmann <obachman@mathematik.uni-kl.de>Send bugs and suggestions to <texi2html@mathematik.uni-kl.de> --><HEAD><TITLE>Autoconf, Automake, and Libtool: Default template arguments</TITLE><META NAME="description" CONTENT="Autoconf, Automake, and Libtool: Default template arguments"><META NAME="keywords" CONTENT="Autoconf, Automake, and Libtool: Default template arguments"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META NAME="Generator" CONTENT="texi2html 1.64"><script language="Javascript"><!-- // Check the browser version. function checkVersion() { if (navigator.appVersion.charAt(0)>=3) return true; if (navigator.appVersion.charAt(0)>=4) return true; 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Templates allow C++ types to be<EM>parameterized</EM> and as such, the parameter is in essence a variablethat the programmer must specify when instantiating the template. Thisrefinement allows defaults to be specified for the template parameters.</P><P>This feature is used extensively throughout the Standard TemplateLibrary (see section <A HREF="autobook_149.html#SEC149">16.2.13 Standard Template Library</A>) to relieve the programmer fromhaving to specify a comparison function for sorted container classes.In most circumstances, the default less-than operator for the type inquestion is sufficient.</P><P>If your compiler does not support default template arguments, you mayhave to suffer without them and require that users of your class andfunction templates provide the default parameters themselves.Depending on how inconvenient this is, you might begrudgingly seek someassistance from the C preprocessor and define some preprocessor macros.</P><P><A NAME="Standard library headers"></A></TR></TABLE><BR> <FONT SIZE="-1">This document was generatedby <I>Gary V. Vaughan</I> on <I>September, 12 2004</I>using <A HREF="http://www.mathematik.uni-kl.de/~obachman/Texi2html"><I>texi2html</I></A></BODY></HTML>⌨️ 快捷键说明
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