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diff --git a/doc/groff.html.node/Warnings.html b/doc/groff.html.node/Warnings.html new file mode 100644 index 0000000..b61ec3a --- /dev/null +++ b/doc/groff.html.node/Warnings.html @@ -0,0 +1,246 @@ +<!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>Warnings (The GNU Troff Manual)</title> + +<meta name="description" content="Warnings (The GNU Troff Manual)"> +<meta name="keywords" content="Warnings (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="Debugging.html" rel="up" title="Debugging"> +<link href="Debugging.html" rel="prev" title="Debugging"> +<style type="text/css"> +<!-- +a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em} +span:hover a.copiable-link {visibility: visible} +--> +</style> + + +</head> + +<body lang="en"> +<div class="subsection-level-extent" id="Warnings"> +<div class="nav-panel"> +<p> +Previous: <a href="Debugging.html" accesskey="p" rel="prev">Debugging</a>, Up: <a href="Debugging.html" accesskey="u" rel="up">Debugging</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="subsection" id="Warnings-1">5.37.1 Warnings</h4> +<a class="index-entry-id" id="index-warnings-1"></a> + +<p>Warning diagnostics emitted by GNU <code class="code">troff</code> are divided into named, +numbered categories. The name associated with each warning category is +used by the <samp class="option">-w</samp> and <samp class="option">-W</samp> options. Each category is also +assigned a power of two; the sum of enabled category values is used by +the <code class="code">warn</code> request and the <code class="code">.warn</code> register. +</p> +<p>Warnings of each category are produced under the following +circumstances. +</p> +<a class="index-entry-id" id="index-categories_002c-warning"></a> +<a class="index-entry-id" id="index-warning-categories"></a> +<dl class="table"> +<dt>‘<samp class="samp">char</samp>’</dt> +<dt>‘<samp class="samp">1</samp>’</dt> +<dd><p>No mounted font defines a glyph for the requested character. This +category is enabled by default. +</p> +</dd> +<dt>‘<samp class="samp">number</samp>’</dt> +<dt>‘<samp class="samp">2</samp>’</dt> +<dd><p>An invalid numeric expression was encountered. This category is enabled +by default. +See <a class="xref" href="Numeric-Expressions.html">Numeric Expressions</a>. +</p> +</dd> +<dt id='index-filling_002c-and-break-warnings'><span>‘<samp class="samp">break</samp>’<a class="copiable-link" href='#index-filling_002c-and-break-warnings'> ¶</a></span></dt> +<dt>‘<samp class="samp">4</samp>’</dt> +<dd><a class="index-entry-id" id="index-mode_002c-fill_002c-and-break-warnings"></a> +<p>A filled output line could not be broken such that its length was less +than the output line length ‘<samp class="samp">\n[.l]</samp>’. This category is enabled by +default. +</p> +</dd> +<dt>‘<samp class="samp">delim</samp>’</dt> +<dt>‘<samp class="samp">8</samp>’</dt> +<dd><p>The closing delimiter in an escape sequence was missing or mismatched. +</p> +</dd> +<dt id='index-ie-request_002c-and-warnings'><span>‘<samp class="samp">el</samp>’<a class="copiable-link" href='#index-ie-request_002c-and-warnings'> ¶</a></span></dt> +<dt>‘<samp class="samp">16</samp>’</dt> +<dd><a class="index-entry-id" id="index-el-request_002c-and-warnings"></a> +<p>The <code class="code">el</code> request was encountered with no prior corresponding +<code class="code">ie</code> request. See <a class="xref" href="if_002delse.html">if-else</a>. +</p> +</dd> +<dt>‘<samp class="samp">scale</samp>’</dt> +<dt>‘<samp class="samp">32</samp>’</dt> +<dd><p>A scaling unit inappropriate to its context was used in a numeric +expression. +</p> +</dd> +<dt>‘<samp class="samp">range</samp>’</dt> +<dt>‘<samp class="samp">64</samp>’</dt> +<dd><p>A numeric expression was out of range for its context. +</p> +</dd> +<dt>‘<samp class="samp">syntax</samp>’</dt> +<dt>‘<samp class="samp">128</samp>’</dt> +<dd><p>A self-contradictory hyphenation mode was requested; an empty or +incomplete numeric expression was encountered; an operand to a numeric +operator was missing; an attempt was made to define a recursive, empty, +or nonsensical character class; or a <code class="code">groff</code> extension conditional +expression operator was used while in compatibility mode. +</p> +</dd> +<dt id='index-di-request_002c-and-warnings'><span>‘<samp class="samp">di</samp>’<a class="copiable-link" href='#index-di-request_002c-and-warnings'> ¶</a></span></dt> +<dt>‘<samp class="samp">256</samp>’</dt> +<dd><a class="index-entry-id" id="index-da-request_002c-and-warnings"></a> +<a class="index-entry-id" id="index-box-request_002c-and-warnings"></a> +<a class="index-entry-id" id="index-boxa-request_002c-and-warnings"></a> +<p>A <code class="code">di</code>, <code class="code">da</code>, <code class="code">box</code>, or <code class="code">boxa</code> request was invoked +without an argument when there was no current diversion. +</p> +</dd> +<dt id='index-de_002c-de1_002c-dei-requests_002c-and-warnings'><span>‘<samp class="samp">mac</samp>’<a class="copiable-link" href='#index-de_002c-de1_002c-dei-requests_002c-and-warnings'> ¶</a></span></dt> +<dt>‘<samp class="samp">512</samp>’</dt> +<dd><a class="index-entry-id" id="index-am_002c-am1_002c-ami-requests_002c-and-warnings"></a> +<a class="index-entry-id" id="index-ds_002c-ds1-requests_002c-and-warnings"></a> +<a class="index-entry-id" id="index-as_002c-as1-requests_002c-and-warnings"></a> +<a class="index-entry-id" id="index-di-request_002c-and-warnings-1"></a> +<a class="index-entry-id" id="index-da-request_002c-and-warnings-1"></a> +<a class="index-entry-id" id="index-box_002c-boxa-requests_002c-and-warnings"></a> +<a class="index-entry-id" id="index-_005c_002a_002c-and-warnings"></a> +<p>An undefined string, macro, or diversion was used. When such an object +is dereferenced, an empty one of that name is automatically created. +So, unless it is later deleted, at most one warning is given for each. +</p> +<p>This warning is also emitted upon an attempt to move an unplanted trap +macro (see <a class="pxref" href="Page-Location-Traps.html">Page Location Traps</a>). In such cases, the unplanted macro +is <em class="emph">not</em> dereferenced, so it is not created if it does not exist. +</p> +</dd> +<dt id='index-nr-request_002c-and-warnings'><span>‘<samp class="samp">reg</samp>’<a class="copiable-link" href='#index-nr-request_002c-and-warnings'> ¶</a></span></dt> +<dt>‘<samp class="samp">1024</samp>’</dt> +<dd><a class="index-entry-id" id="index-_005cR_002c-and-warnings"></a> +<a class="index-entry-id" id="index-_005cn_002c-and-warnings"></a> +<p>An undefined register was used. When an undefined register is +dereferenced, it is automatically defined with a value of 0. So, +unless it is later deleted, at most one warning is given for each. +</p> +</dd> +<dt id='index-_005ct_002c-and-warnings'><span>‘<samp class="samp">tab</samp>’<a class="copiable-link" href='#index-_005ct_002c-and-warnings'> ¶</a></span></dt> +<dt>‘<samp class="samp">2048</samp>’</dt> +<dd><p>A tab character was encountered where a number was expected, or appeared +in an unquoted macro argument. +</p> +</dd> +<dt id='index-_005c_007d_002c-and-warnings'><span>‘<samp class="samp">right-brace</samp>’<a class="copiable-link" href='#index-_005c_007d_002c-and-warnings'> ¶</a></span></dt> +<dt>‘<samp class="samp">4096</samp>’</dt> +<dd><p>A right brace escape sequence <code class="code">\}</code> was encountered where a number +was expected. +</p> +</dd> +<dt>‘<samp class="samp">missing</samp>’</dt> +<dt>‘<samp class="samp">8192</samp>’</dt> +<dd><p>A request was invoked with a mandatory argument absent. +</p> +</dd> +<dt>‘<samp class="samp">input</samp>’</dt> +<dt>‘<samp class="samp">16384</samp>’</dt> +<dd><p>An invalid character occurred on the input stream. +</p> +</dd> +<dt>‘<samp class="samp">escape</samp>’</dt> +<dt>‘<samp class="samp">32768</samp>’</dt> +<dd><p>An unsupported escape sequence was encountered. +</p> +</dd> +<dt id='index-compatibility-mode'><span>‘<samp class="samp">space</samp>’<a class="copiable-link" href='#index-compatibility-mode'> ¶</a></span></dt> +<dt>‘<samp class="samp">65536</samp>’</dt> +<dd><p>A space was missing between a request or macro and its argument. This +warning is produced when an undefined name longer than two characters is +encountered and the first two characters of the name constitute a +defined name. No request is invoked, no macro called, and an empty +macro is not defined. This category is enabled by default. It never +occurs in compatibility mode. +</p> +</dd> +<dt>‘<samp class="samp">font</samp>’</dt> +<dt>‘<samp class="samp">131072</samp>’</dt> +<dd><p>A non-existent font was selected, or the selection was ignored because a +font selection escape sequence was used after the output line +continuation escape sequence on an input line. This category is enabled +by default. +</p> +</dd> +<dt>‘<samp class="samp">ig</samp>’</dt> +<dt>‘<samp class="samp">262144</samp>’</dt> +<dd><p>An invalid escape sequence occurred in input ignored using the <code class="code">ig</code> +request. This warning category diagnoses a condition that is an error +when it occurs in non-ignored input. +</p> +</dd> +<dt>‘<samp class="samp">color</samp>’</dt> +<dt>‘<samp class="samp">524288</samp>’</dt> +<dd><p>An undefined color was selected, an attempt was made to define a color +using an unrecognized color space, an invalid component in a color +definition was encountered, or an attempt was made to redefine a default +color. +</p> +</dd> +<dt>‘<samp class="samp">file</samp>’</dt> +<dt>‘<samp class="samp">1048576</samp>’</dt> +<dd><p>An attempt was made to load a file that does not exist. This category +is enabled by default. +</p></dd> +</dl> + +<p>Two warning names group other warning categories for convenience. +</p> +<dl class="table"> +<dt>‘<samp class="samp">all</samp>’</dt> +<dd><p>All warning categories except ‘<samp class="samp">di</samp>’, ‘<samp class="samp">mac</samp>’ and ‘<samp class="samp">reg</samp>’. +This shorthand is intended to produce all warnings that are useful with +macro packages written for <abbr class="acronym">AT&T</abbr> <code class="code">troff</code> and its +descendants, which have less fastidious diagnostics than GNU +<code class="code">troff</code>. +</p> +</dd> +<dt>‘<samp class="samp">w</samp>’</dt> +<dd><p>All warning categories. Authors of documents and macro packages +targeting <code class="code">groff</code> are encouraged to use this setting. +</p></dd> +</dl> + + +</div> +<hr> +<div class="nav-panel"> +<p> +Previous: <a href="Debugging.html">Debugging</a>, Up: <a href="Debugging.html">Debugging</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> + + + +</body> +</html> |