diff options
Diffstat (limited to '')
| -rw-r--r-- | doc/groff.html.node/The-Implicit-Page-Trap.html | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/doc/groff.html.node/The-Implicit-Page-Trap.html b/doc/groff.html.node/The-Implicit-Page-Trap.html new file mode 100644 index 0000000..82d1a6b --- /dev/null +++ b/doc/groff.html.node/The-Implicit-Page-Trap.html @@ -0,0 +1,74 @@ +<!DOCTYPE html> +<html> +<!-- Created by GNU Texinfo 7.0.3, https://www.gnu.org/software/texinfo/ --> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> +<!-- This manual documents GNU troff version 1.23.0. + +Copyright © 1994-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with no +Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A +copy of the license is included in the section entitled "GNU Free +Documentation License". --> +<title>The Implicit Page Trap (The GNU Troff Manual)</title> + +<meta name="description" content="The Implicit Page Trap (The GNU Troff Manual)"> +<meta name="keywords" content="The Implicit Page Trap (The GNU Troff Manual)"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta name="viewport" content="width=device-width,initial-scale=1"> + +<link href="index.html" rel="start" title="Top"> +<link href="Request-Index.html" rel="index" title="Request Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Vertical-Position-Traps.html" rel="up" title="Vertical Position Traps"> +<link href="Diversion-Traps.html" rel="next" title="Diversion Traps"> +<link href="Page-Location-Traps.html" rel="prev" title="Page Location Traps"> + + +</head> + +<body lang="en"> +<div class="subsubsection-level-extent" id="The-Implicit-Page-Trap"> +<div class="nav-panel"> +<p> +Next: <a href="Diversion-Traps.html" accesskey="n" rel="next">Diversion Traps</a>, Previous: <a href="Page-Location-Traps.html" accesskey="p" rel="prev">Page Location Traps</a>, Up: <a href="Vertical-Position-Traps.html" accesskey="u" rel="up">Vertical Position Traps</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Request-Index.html" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<h4 class="subsubsection" id="The-Implicit-Page-Trap-1">5.28.1.2 The Implicit Page Trap</h4> +<a class="index-entry-id" id="index-implicit-trap"></a> +<a class="index-entry-id" id="index-trap_002c-implicit"></a> + +<a class="index-entry-id" id="index-page-break-2"></a> +<a class="index-entry-id" id="index-break_002c-page-2"></a> +<a class="index-entry-id" id="index-page-ejection-2"></a> +<a class="index-entry-id" id="index-ejection_002c-page-2"></a> +<p>If, after starting GNU <code class="code">troff</code> without loading a macro package, you +use the <code class="code">ptr</code> request to dump a list of the active traps to the +standard error stream,<a class="footnote" id="DOCF109" href="groff.html_fot.html#FOOT109"><sup>109</sup></a> nothing is reported. +Yet the <code class="code">.t</code> register will report a steadily decreasing value with +every output line your document produces, and once the value of +<code class="code">.t</code> gets to within <code class="code">.V</code> of zero, you will notice that +something trap-like happens—the page is ejected, a new one begins, and +the value of <code class="code">.t</code> becomes large once more. +</p> +<p>This <em class="dfn">implicit page trap</em> always exists in the top-level +diversion;<a class="footnote" id="DOCF110" href="groff.html_fot.html#FOOT110"><sup>110</sup></a> it works like a trap in some +ways but not others. Its purpose is to eject the current page and start +the next one. It has no name, so it cannot be moved or deleted with +<code class="code">wh</code> or <code class="code">ch</code> requests. You cannot hide it by placing another +trap at its location, and can move it only by redefining the page length +with <code class="code">pl</code>. Its operation is suppressed when vertical page traps +are disabled with GNU <code class="code">troff</code>’s <code class="code">vpt</code> request. +</p> + +</div> + + + +</body> +</html> |