Editing Writing Lua in TeX

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because the double brackets signals a string in Lua where no escape sequence occurs (and the string can also run on several lines). Note however that in the second case <tt>myvar</tt> will be defined with a trailing space, i.e. as <tt>"\macro "</tt>, because of TeX's habit to append a trailing space to unexpanded (or unexpandable) control sequences.
 
because the double brackets signals a string in Lua where no escape sequence occurs (and the string can also run on several lines). Note however that in the second case <tt>myvar</tt> will be defined with a trailing space, i.e. as <tt>"\macro "</tt>, because of TeX's habit to append a trailing space to unexpanded (or unexpandable) control sequences.
 
If one wants the backslash to be treated as any other character (not creating control sequences), then one has to rewrite <tt>\luacode</tt> as follows:
 
 
<pre>
 
\def\luacode{%
 
  \bgroup
 
  \catcode`\\=12
 
  \catcode`\{=12
 
  \catcode`\}=12
 
  \catcode`\^^M=12
 
  \catcode`\#=12
 
  \catcode`\~=12
 
  \catcode`\%=12
 
  \doluacode
 
}
 
 
\bgroup
 
\catcode`\|=0
 
\catcode`\^^M=12 %
 
\catcode`\\=12 %
 
|long|gdef|doluacode#1^^M#2\endluacode{|directlua{#2}|egroup}%
 
|egroup
 
</pre>
 
 
Backslashes remain escape characters in Lua, though.
 
  
 
=== Braces ===
 
=== Braces ===

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