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diff --git a/Master/texmf-dist/doc/latex/l3kernel/l3styleguide.tex b/Master/texmf-dist/doc/latex/l3kernel/l3styleguide.tex deleted file mode 100644 index c14d7d8eefd..00000000000 --- a/Master/texmf-dist/doc/latex/l3kernel/l3styleguide.tex +++ /dev/null @@ -1,174 +0,0 @@ -\iffalse meta-comment - -File l3styleguide.tex Copyright (C) 2011 The LaTeX3 Project - -It may be distributed and/or modified under the conditions of the -LaTeX Project Public License (LPPL), either version 1.3c of this -license or (at your option) any later version. The latest version -of this license is in the file - - http://www.latex-project.org/lppl.txt - -This file is part of the "l3kernel bundle" (The Work in LPPL) -and all files in that bundle must be distributed together. - -The released version of this bundle is available from CTAN. - -\fi - -\documentclass{l3doc} -\usepackage{svn-multi} - -\svnid{$Id: l3styleguide.tex 2772 2011-09-07 15:07:41Z joseph $} -\def\filedate{\svnfileyear/\svnfilemonth/\svnfileday} - -\title{% - The \LaTeX3 kernel: style guide for code authors% - \thanks - {% - This file describes v\svnfilerev, - last revised \filedate. - }% -} -\author{% - The \LaTeX3 Project\thanks - {% - E-mail: - \href{mailto:latex-team@latex-project.org}% - {latex-team@latex-project.org}% - }% -} -\date{Released \filedate} - -\begin{document} - -\maketitle - -\tableofcontents - -\section{Introduction} - -This document is intended as a style guide for authors of code and -documentation for the \LaTeX3 kernel. It covers both aspects of coding -style and the formatting of the sources. The aim of providing these -guidelines is help ensure consistency of the code and sources from -different authors. Experience suggests that in the long-term this helps -with maintenance. There will of course be places where there are -exceptions to these guidelines: common sense should always be -applied! - -\section{Documentation style} - -\LaTeX3 source and documentation should be written using the document -class \cls{l3doc} in \file{dtx} format. This class provides a number -of logical mark up elements, which should be used where possible. -In the main, this is standard \LaTeX{} practice, but there are a -few points to highlight: -\begin{itemize} - \item - Where possible, use \cs{cs} to mark up control sequences - rather than using a verbatim environment. - \item - Arguments which are given in braces should be marked using - \cs{Arg} when code-level functions are discussed, but using - \cs{marg} for document functions. - \item - The names \TeX{}, \LaTeX{}, \emph{etc}.\ use the normal logical mark - up followed by an empty group (|{}|), with the exception of |\LaTeX3|, - where the number should follow directly. - \item - Where in line verbatim text is used, it should be marked up - using the \verb=|...|= construct (\emph{i.e.}~vertical bars delimit - the verbatim text). - \item In line quotes should be marked up using the \cs{enquote} - function. - \item - Where numbers in the source have a mathematical meaning, - they should be included in math mode. Such in-line math mode - material should be marked up using |$...$| and \emph{not} - |\(...\)|. -\end{itemize} - -Line length in the source files should to be under $80$ -characters where possible, as this helps keep everything on the screen -when editing files. In the \file{dtx} format, documentation lines start -with a \texttt{\%}, which is usually followed by a space to leave a -\enquote{comment margin} at the start of each line. - -As with code indenting (see later), nested environments and arguments -should be indented by (at least) two spaces to make the nature of the nesting -clear. Thus for example a typical arrangement for the \env{function} -environment might be -\begin{verbatim*} -\begin{function}{\seq_gclear:N, \seq_gclear:c} - \begin{syntax} - \cs{seq_gclear:N} \meta{sequence} - \end{syntax} - Clears all entries from the \meta{sequence} globally. -\end{function} -\end{verbatim*} -The \enquote{outer} \verb*|% \begin{function}| should have the customary -space after the |%| character at the start of the line. - -In general, a single \env{function} or \env{macro} environment should be -used for a group of closely-related functions, for example argument -specification variants. In such cases, a comma-separated list should be -used, as shown in the preceding example. - -\section{Format of the code itself} - -The requirement for less than $80$ characters per line applies to the code -itself as well as the surrounding documentation. A number of the general -style principals for \LaTeX3 code apply: these are described in the following -paragraph and an example is then given. - -With the exception of simple runs of parameter (|{#1}|, |#1#2|, -\emph{etc.}), everything should divided up using spaces to make the code -more readable. In general, these will be single spaces, but in some -places it makes more sense to align parts of the code to emphasise -similarity. (Tabs should not be used for introducing white space.) - -Each conceptually-separate step in a function should be on a separate -line, to make the meaning clearer. Hence the \texttt{false} branch -in the example uses two lines for the two auxiliary function uses. - -Within the definition, a two-space indent should be used to show each -\enquote{level} of code. Thus in the example \cs{tl_if_empty:nTF} is -indented by two spaces, but the two branches are indented by four -spaces. Within the \texttt{false} branch, the need for multiple lines -means that an additional two-space indent should be used to show that -these lines are all part of the brace group. - -The result of these lay-out conventions is code which will in general -look like the example: -\begin{verbatim*} -\cs_new:Npn \module_foo:nn #1#2 - { - \tl_if_empty:nTF {#1} - { \module_foo_aux:n { X #2 } } - { - \module_foo_aux:nn {#1} {#2} - \module_foo_aux:n {#1#2} - } - } -\end{verbatim*} - -\section{Code conventions} - -When using \cs{cs_generate_variant:Nn}, group related variants together -to make the pattern clearer. A common example is variants of a function -which has an \texttt{N}-type first argument: -\begin{verbatim*} -\cs_generate_variant:Nn \foo:Nn { NV , No } -\cs_generate_variant:Nn \foo:Nn { c , cV , co } -\end{verbatim*} - -There are cases where omitting braces from \texttt{o}-type arguments -is desirable for performance reasons. This should only be done if the -argument is a single token, thus for example -\begin{verbatim} -\tl_set:No \l_some_tl \l_some_other_tl -\end{verbatim} -remains clear and can be used where appropriate. - -\end{document} |