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diff --git a/Master/texmf-doc/doc/english/FAQ-en/html/FAQ-ltxhash.html b/Master/texmf-doc/doc/english/FAQ-en/html/FAQ-ltxhash.html deleted file mode 100644 index 0e3d777727f..00000000000 --- a/Master/texmf-doc/doc/english/FAQ-en/html/FAQ-ltxhash.html +++ /dev/null @@ -1,55 +0,0 @@ -<head> -<title>UK TeX FAQ -- question label ltxhash</title> -</head><body> -<h3>Defining LaTeX commands within other commands</h3> -<p/>LaTeX command definition is significantly different from the TeX -primitive form discussed in an -<a href="FAQ-hash.html">earlier question</a> about definitions within -macros. -<p/>In most ways, the LaTeX situation is simpler (at least in part -because it imposes more restrictions on the user); however, defining a -command within a command still requires some care. -<p/>The earlier question said you have to double the <code>#</code> signs in command -definitions: in fact, the same rule holds, except that LaTeX -already takes care of some of the issues, by generating argument lists -for you. -<p/>The basic problem is that: -<blockquote> -<pre> -\newcommand{\abc}[1]{joy, oh #1!% - \newcommand{\ghi}[1]{gloom, oh #1!}% -} -</pre> -</blockquote><p> -followed by a call: -<blockquote> -<pre> -\cmdinvoke{abc}{joy} -</pre> -</blockquote><p> -typesets “joy, oh joy!”, but defines a command <code>\</code><code>ghi</code> that takes -one parameter, which it ignores; <code>\</code><code>ghi{gloom}</code> will expand to -“gloom, oh joy!”, which is presumably not what was expected. -<p/>And (as you will probably guess, if you’ve read the earlier question) -the definition: -<blockquote> -<pre> -\newcommand{\abc}[1]{joy, oh #1!% - \newcommand{\ghi}[1]{gloom, oh ##1!}% -} -</pre> -</blockquote><p> -does what is required, and <code>\</code><code>ghi{gloom}</code> will expand to -“gloom, oh gloom!”, whatever the argument to <code>\</code><code>abc</code>. -<p/>The doubling is needed whether or not the enclosing command has an -argument, so: -<blockquote> -<pre> -\newcommand{\abc}{joy, oh joy!% - \newcommand{\ghi}[1]{gloom, oh ##1!}% -} -</pre> -</blockquote><p> -is needed to produce a replica of the <code>\</code><code>ghi</code> we defined earlier. -<p/><p/><p/><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=ltxhash">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=ltxhash</a> -</body> |