<?xml version="1.0" encoding="utf-8" ?> <!-- for emacs: -*- coding: utf-8 -*- --> <!-- Apache may like this line in the file .htaccess: AddCharset utf-8 .html --> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg-flat.dtd" > <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head><title>flagLookup -- flag a symbol</title> <link rel="stylesheet" type="text/css" href="../../../../Macaulay2/Style/doc.css"/> </head> <body> <table class="buttons"> <tr> <td><div><a href="___Flat__Monoid.html">next</a> | <a href="_fitting__Ideal.html">previous</a> | <a href="___Flat__Monoid.html">forward</a> | <a href="_fitting__Ideal.html">backward</a> | up | <a href="index.html">top</a> | <a href="master.html">index</a> | <a href="toc.html">toc</a> | <a href="http://www.math.uiuc.edu/Macaulay2/">Macaulay2 web site</a></div> </td> </tr> </table> <hr/> <div><h1>flagLookup -- flag a symbol</h1> <div class="single"><h2>Synopsis</h2> <ul><li><div class="list"><dl class="element"><dt class="heading">Usage: </dt><dd class="value"><div><tt>flagLookup x</tt></div> </dd></dl> </div> </li> <li><div class="single">Inputs:<ul><li><span><tt>x</tt>, <span>a <a href="___Symbol.html">symbol</a></span></span></li> </ul> </div> </li> <li><div class="single">Consequences:<ul><li>The first use arranges for each subsequent reference to the symbol <tt>x</tt> to result in an error message. The second use cancels the arrangement. Each subsequent use toggles the state.</li> </ul> </div> </li> <li><div class="single">Outputs:<ul><li><span><span>a <a href="___Boolean.html">Boolean value</a></span>, whether each subsequent reference to the symbol <tt>x</tt> will result in an error message</span></li> </ul> </div> </li> </ul> </div> <div class="single"><h2>Description</h2> <div><p>To get access to a flagged symbol without signalling an error, use <a href="_get__Global__Symbol.html" title="create a global symbol in a global dictionary">getGlobalSymbol</a>.</p> </div> </div> </div> </body> </html>