Mercurial > ~dholland > hg > ag > index.cgi

view doc/misc/html/oldclasslib/pair.html @ 8:ec2b657edf13

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add explicit lint-comment-style fallthrough annotations. GCC now assumes that if you don't have these you're making a mistake, which is annoying. XXX: This changeset updates the AG output files only (by hand) and is XXX: abusive - rebuilding them will erase the change. However, I need XXX: to get things to build before I can try to get AG to issue the XXX: annotations itself, so this seems like a reasonable expedient.
author David A. Holland
date Mon, 30 May 2022 23:51:43 -0400
parents 13d2b8934445
children
line wrap: on
line source

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<TITLE>Pair Class Definition</TITLE>
</HEAD>


<BODY BGCOLOR="#ffffff" BACKGROUND="tilbl6h.gif"
 TEXT="#000000" LINK="#0033CC"
 VLINK="#CC0033" ALINK="#CC0099">

<P>
<IMG ALIGN="right" SRC="../images/agrsl6c.gif" ALT="AnaGram"
         WIDTH=124 HEIGHT=30 >
<BR CLEAR="all">
Back to :
<A HREF="../index.html">Index</A> |
<A HREF="index.html">Class libraries for examples</A>
<P>

<IMG ALIGN="bottom" SRC="../images/rbline6j.gif" ALT="----------------------"
        WIDTH=1010 HEIGHT=2  >
<P>

<H1>Pair Class Definition</H1>
<IMG ALIGN="bottom" SRC="../images/rbline6j.gif" ALT="----------------------"
        WIDTH=1010 HEIGHT=2  >
<P>
<BR>
<H2>Introduction</H2>
<P>
          <CODE> pair&lt;class T&gt; </CODE> is a template class that provides arithmetic
          and comparison operations on ordered pairs of elements of
          type T. Class T must  implement arithmetic and comparison
          operators.
<P>
          All operations are element-wise, including multiplication,
          division and comparisons. Using these definitions, sets
          of pairs are not well ordered in the mathematical sense. That
          is, it is possible that for pairs p and q both p &lt; q and
          p &gt; q could be false.
<P>
          Pairs of integers are quite useful for recording and
          manipulating screen coordinates.
<P>
<BR>

<H2>     Constructors </H2>

          There are two constructors, one which takes two arguments of
          type T, and sets the elements of the pair appropriately. The
          other constructor takes no arguments, and initializes the
          elements to zero.

<P>
<BR>


<IMG ALIGN="bottom" SRC="../images/rbline6j.gif" ALT="----------------------"
      WIDTH=1010 HEIGHT=2 >
<P>
<IMG ALIGN="right" SRC="../images/pslrb6d.gif" ALT="Parsifal Software"
                WIDTH=181 HEIGHT=25>
<BR CLEAR="right">

<P>
Back to :
<A HREF="../index.html">Index</A> |
<A HREF="index.html">Class libraries for examples</A>

<P>
<ADDRESS><FONT SIZE="-1">
                  AnaGram parser generator - examples<BR>
                  Class libraries - Pair class definition<BR>
                  Copyright &copy; 1993-1999, Parsifal Software. <BR>
                  All Rights Reserved.<BR>
</FONT></ADDRESS>

</BODY>
</HTML>