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| -rw-r--r-- | Master/texmf-dist/doc/latex/gtl/README | 15 | ||||
| -rw-r--r-- | Master/texmf-dist/doc/latex/gtl/gtl.pdf | bin | 0 -> 546259 bytes | |||
| -rw-r--r-- | Master/texmf-dist/source/latex/gtl/gtl.dtx | 1508 | ||||
| -rw-r--r-- | Master/texmf-dist/source/latex/gtl/gtl.ins | 23 | ||||
| -rw-r--r-- | Master/texmf-dist/tex/latex/gtl/gtl.sty | 619 |
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diff --git a/Master/texmf-dist/doc/latex/gtl/README b/Master/texmf-dist/doc/latex/gtl/README new file mode 100644 index 00000000000..bd728c27b0c --- /dev/null +++ b/Master/texmf-dist/doc/latex/gtl/README @@ -0,0 +1,15 @@ +---------------------------------------------------------------- +gtl --- Manipulate unbalanced lists of tokens +E-mail: blflatex@gmail.com +Released under the LaTeX Project Public License v1.3c or later +See http://www.latex-project.org/lppl.txt +---------------------------------------------------------------- + +The gtl LaTeX package provides tools to manipulate lists of +tokens which may be unbalanced. + +This package requires up-to-date versions of the l3kernel, +l3packages, and l3experimental bundles. + +The package is extracted by running "pdflatex gtl.ins". +For documentation, run "pdflatex gtl.dtx" twice.
\ No newline at end of file diff --git a/Master/texmf-dist/doc/latex/gtl/gtl.pdf b/Master/texmf-dist/doc/latex/gtl/gtl.pdf Binary files differnew file mode 100644 index 00000000000..9c9ebda1a53 --- /dev/null +++ b/Master/texmf-dist/doc/latex/gtl/gtl.pdf diff --git a/Master/texmf-dist/source/latex/gtl/gtl.dtx b/Master/texmf-dist/source/latex/gtl/gtl.dtx new file mode 100644 index 00000000000..d823c651253 --- /dev/null +++ b/Master/texmf-dist/source/latex/gtl/gtl.dtx @@ -0,0 +1,1508 @@ +% \iffalse +%% File: gtl.dtx Copyright (C) 2013 Bruno Le Floch +%% +%% 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 +%% +%% ----------------------------------------------------------------------- +% +%<*driver> +%\fi +%\iffalse +\documentclass[full]{l3doc} +\usepackage{gtl} +\begin{document} + \DocInput{gtl.dtx} +\end{document} +%</driver> +% \fi +% +% \title{The \textsf{gtl} package: \\ +% manipulate unbalanced lists of tokens\thanks{This +% file has version number 0.0a, last revised 2013/07/28.}} +% \author{Bruno Le Floch} +% \date{2013/07/28} +% +% \maketitle +% \tableofcontents +% +% \begin{documentation} +% +% \section{\pkg{gtl} documentation} +% +% The \texttt{expl3} programming language provides various tools to +% manipulate lists of tokens (package \pkg{l3tl}). However, those token +% lists must have balanced braces, or more precisely balanced +% begin-group and end-group characters. The \pkg{gtl} package +% manipulates instead lists of tokens which may be unbalanced, with more +% begin-group or more end-group characters. +% +% \subsection{Creating and initialising extended token lists} +% +% \begin{function}{\gtl_new:N} +% \begin{syntax} +% \cs{gtl_new:N} \meta{gtl~var} +% \end{syntax} +% Creates a new \meta{gtl~var} or raises an error if the name is +% already taken. The declaration is global. The \meta{gtl~var} will +% initially be empty. +% \end{function} +% +% \begin{function}{\gtl_const:Nn, \gtl_const:Nx} +% \begin{syntax} +% \cs{gtl_const:Nn} \meta{gtl~var} \Arg{token list} +% \end{syntax} +% Creates a new constant \meta{gtl~var} or raises an error if the name +% is already taken. The value of the \meta{gtl~var} will be set +% globally to the balanced \meta{token list}. +% \end{function} +% +% \begin{function}{\gtl_clear:N, \gtl_gclear:N} +% \begin{syntax} +% \cs{gtl_clear:N} \meta{gtl~var} +% \end{syntax} +% Empties the \meta{gtl~var}, locally or globally. +% \end{function} +% +% \begin{function}{\gtl_clear_new:N, \gtl_gclear_new:N} +% \begin{syntax} +% \cs{gtl_clear_new:N} \meta{gtl~var} +% \end{syntax} +% Ensures that the \meta{gtl~var} exists globally by applying +% \cs{gtl_new:N} if necessary, then applies \cs{gtl_(g)clear:N} to +% leave the \meta{gtl~var} empty. +% \end{function} +% +% \begin{function}{\gtl_set_eq:NN, \gtl_gset_eq:NN} +% \begin{syntax} +% \cs{gtl_set_eq:NN} \meta{gtl~var_1} \meta{gtl~var_2} +% \end{syntax} +% Sets the content of \meta{gtl~var_1} equal to that of +% \meta{gtl~var_2}. +% \end{function} +% +% \begin{function}{\gtl_concat:NNN, \gtl_gconcat:NNN} +% \begin{syntax} +% \cs{gtl_concat:NNN} \meta{gtl~var_1} \meta{gtl~var_2} \meta{gtl~var_3} +% \end{syntax} +% Concatenates the content of \meta{gtl~var_2} and \meta{gtl~var_3} +% together and saves the result in \meta{gtl~var_1}. The +% \meta{gtl~var_2} will be placed at the left side of the new extended +% token list. +% \end{function} +% +% \begin{function}[EXP, pTF]{\gtl_if_exist:N} +% \begin{syntax} +% \cs{gtl_if_exist_p:N} \meta{gtl~var} +% \cs{gtl_if_exist:NTF} \meta{gtl~var} \Arg{true code} \Arg{false code} +% \end{syntax} +% Tests whether the \meta{gtl~var} is currently defined. This does +% not check that the \meta{gtl~var} really is an extended token list +% variable. +% \end{function} +% +% \subsection{Adding data to token list variables} +% +% \begin{function}{\gtl_set:Nn, \gtl_set:Nx, \gtl_gset:Nn, \gtl_gset:Nx} +% \begin{syntax} +% \cs{gtl_set:Nn} \meta{gtl~var} \Arg{token list} +% \end{syntax} +% Sets \meta{gtl~var} to contain the balanced \meta{token list}, +% removing any previous content from the variable. +% \end{function} +% +% \begin{function}{\gtl_put_left:Nn, \gtl_gput_left:Nn} +% \begin{syntax} +% \cs{gtl_put_left:Nn} \meta{gtl~var} \Arg{token list} +% \end{syntax} +% Appends the balanced \meta{token list} to the left side of the +% current content of \meta{gtl~var}. +% \end{function} +% +% \begin{function}{\gtl_put_right:Nn, \gtl_gput_right:Nn} +% \begin{syntax} +% \cs{gtl_put_right:Nn} \meta{gtl~var} \Arg{token list} +% \end{syntax} +% Appends the balanced \meta{token list} to the right side of the +% current content of \meta{gtl~var}. +% \end{function} +% +% \subsection{Extended token list conditionals} +% +% \begin{function}[EXP, pTF]{\gtl_if_blank:N} +% \begin{syntax} +% \cs{gtl_if_blank_p:N} \Arg{gtl~var} +% \cs{gtl_if_blank:NTF} \Arg{gtl~var} \Arg{true code} \Arg{false code} +% \end{syntax} +% Tests if the \meta{gtl~var} consists only of blank spaces. The test +% is \texttt{true} if \meta{gtl~var} consists of zero or more explicit +% space characters (explicit tokens with character code~$32$ and +% category code~$10$), and is \texttt{false} otherwise. +% \end{function} +% +% \begin{function}[EXP,pTF]{\gtl_if_empty:N} +% \begin{syntax} +% \cs{gtl_if_empty_p:N} \meta{gtl~var} +% \cs{gtl_if_empty:NTF} \meta{gtl~var} \Arg{true code} \Arg{false code} +% \end{syntax} +% Tests if the \meta{gtl~var} is entirely empty (\emph{i.e.}~contains +% no tokens at all). +% \end{function} +% +% \begin{function}[EXP,pTF]{\gtl_if_eq:NN} +% \begin{syntax} +% \cs{gtl_if_eq_p:NN} \Arg{gtl~var_1} \Arg{gtl~var_2} +% \cs{gtl_if_eq:NNTF} \Arg{gtl~var_1} \Arg{gtl~var_2} \Arg{true code} \Arg{false code} +% \end{syntax} +% Tests if \meta{gtl~var_1} and \meta{gtl~var_2} have the same +% content. The test is \texttt{true} if the two contain the same list +% of tokens (identical in both character code and category code). +% \end{function} +% +% \begin{function}[EXP,pTF]{\gtl_if_single_token:N} +% \begin{syntax} +% \cs{gtl_if_single_token_p:N} \meta{gtl~var} +% \cs{gtl_if_single_token:NTF} \meta{gtl~var} \Arg{true code} \Arg{false code} +% \end{syntax} +% Tests if the content of the \meta{gtl~var} consists of a single +% token. Such a token list has token count $1$ according to +% \cs{gtl_count_tokens:N}. +% \end{function} +% +% \begin{function}[EXP,pTF]{\gtl_if_tl:N} +% \begin{syntax} +% \cs{gtl_if_tl_p:N} \meta{gtl~var} +% \cs{gtl_if_tl:NTF} \meta{gtl~var} \Arg{true code} \Arg{false code} +% \end{syntax} +% Tests if the \meta{gtl~var} is balanced. +% \end{function} +% +% \subsection{The first token from an extended token list} +% +% \begin{function}[EXP]{\gtl_head:N} +% \begin{syntax} +% \cs{gtl_head:N} \meta{gtl~var} +% \end{syntax} +% Leaves in the input stream the first token in the \meta{gtl~var}. +% If the \meta{gtl~var} is empty, nothing is left in the input stream. +% \end{function} +% +% \begin{function}[EXP]{\gtl_head_do:NN} +% \begin{syntax} +% \cs{gtl_head_do:NN} \meta{gtl~var} \meta{cs} +% \end{syntax} +% Leaves in the input stream the \meta{control sequence} followed by +% the first token in \meta{gtl~var}. If the \meta{gtl~var} is empty, +% the \meta{cs} is followed by \cs{q_no_value}. +% \end{function} +% +% \begin{function}{\gtl_get_left:NN} +% \begin{syntax} +% \cs{gtl_get_left:NN} \meta{gtl~var_1} \meta{gtl~var_2} +% \end{syntax} +% Stores the first token from \meta{gtl~var_1} in \meta{gtl~var_2} as +% an single-token extended token list, without removing it from +% \meta{gtl~var_1}. +% \end{function} +% +% \begin{function}{\gtl_pop_left:N, \gtl_gpop_left:N} +% \begin{syntax} +% \cs{gtl_pop_left:N} \meta{gtl~var} +% \end{syntax} +% Remove the first token from \meta{gtl~var_1}. +% \end{function} +% +% \begin{function}{\gtl_pop_left:NN, \gtl_gpop_left:NN} +% \begin{syntax} +% \cs{gtl_pop_left:NN} \meta{gtl~var_1} \meta{gtl~var_2} +% \end{syntax} +% Stores the first token from \meta{gtl~var_1} in \meta{gtl~var_2} as +% an single-token extended token list, and remove it from +% \meta{gtl~var_1}. +% \end{function} +% +% \begin{function}[EXP,pTF]{\gtl_if_head_eq_catcode:NN} +% \begin{syntax} +% \cs{gtl_if_head_eq_catcode_p:NN} \Arg{gtl~var} \meta{test token} +% \cs{gtl_if_head_eq_catcode:NNTF} \Arg{gtl~var} \meta{test token} +% ~~\Arg{true code} \Arg{false code} +% \end{syntax} +% Tests if the first token in \meta{gtl~var} has the same category +% code as the \meta{test token}. In the case where \meta{gtl~var} is +% empty, the test will always be \texttt{false}. +% \end{function} +% +% \begin{function}[EXP,pTF]{\gtl_if_head_eq_charcode:NN} +% \begin{syntax} +% \cs{gtl_if_head_eq_charcode_p:NN} \Arg{gtl~var} \meta{test token} +% \cs{gtl_if_head_eq_charcode:NNTF} \Arg{gtl~var} \meta{test token} +% ~~\Arg{true code} \Arg{false code} +% \end{syntax} +% Tests if the first token in \meta{gtl~var} has the same character +% code as the \meta{test token}. In the case where \meta{gtl~var} is +% empty, the test will always be \texttt{false}. +% \end{function} +% +% \begin{function}[EXP,pTF]{\gtl_if_head_eq_meaning:NN} +% \begin{syntax} +% \cs{gtl_if_head_eq_meaning_p:NN} \Arg{gtl~var} \meta{test token} +% \cs{gtl_if_head_eq_meaning:NNTF} \Arg{gtl~var} \meta{test token} +% ~~\Arg{true code} \Arg{false code} +% \end{syntax} +% Tests if the first token in \meta{gtl~var} has the same meaning as +% the \meta{test token}. In the case where \meta{gtl~var} is empty, +% the test will always be \texttt{false}. +% \end{function} +% +% \begin{function}[EXP,pTF] +% { +% \gtl_if_head_is_group_begin:N, +% \gtl_if_head_is_group_end:N, +% \gtl_if_head_is_N_type:N, +% \gtl_if_head_is_space:N, +% } +% \begin{syntax} +% \cs{gtl_if_head_is_group_begin_p:N} \Arg{gtl~var} +% \cs{gtl_if_head_is_group_begin:NTF} \Arg{gtl~var} +% ~~\Arg{true code} \Arg{false code} +% \end{syntax} +% Tests whether the first token in \meta{gtl~var} is an explicit +% begin-group character, an explicit end-group character, an |N|-type +% token, or a space. In the case where \meta{gtl~var} is empty, the +% test will always be \texttt{false}. +% \end{function} +% +% \subsection{The first few tokens from an extended token list} +% +% \begin{function}[EXP]{\gtl_left_tl:N} +% \begin{syntax} +% \cs{gtl_left_tl:N} \meta{gtl~var} +% \end{syntax} +% Leaves in the input stream all tokens in \meta{gtl~var} until the +% first extra begin-group or extra end-group character, within +% \cs{exp_not:n}. This is the longest balanced token list starting +% from the left of \meta{gtl~var}. +% \end{function} +% +% \begin{function}{\gtl_pop_left_tl:N, \gtl_gpop_left_tl:N} +% \begin{syntax} +% \cs{gtl_pop_left_tl:N} \meta{gtl~var} +% \end{syntax} +% Remove from the \meta{gtl~var} all tokens before the first extra +% begin-group or extra end-group character. The tokens that are +% removed form the longest balanced token list starting from the left +% of \meta{gtl~var}. +% \end{function} +% +% \begin{function}[EXP]{\gtl_left_item:NF} +% \begin{syntax} +% \cs{gtl_left_item:NF} \meta{gtl~var} \Arg{false code} +% \end{syntax} +% Leaves in the input stream the first \meta{item} of the +% \meta{gtl~var}: this is identical to \cs{tl_head:n} applied to the +% result of \cs{gtl_left_tl:N}. If there is no such item, the +% \meta{false code} is left in the input stream. +% \end{function} +% +% \begin{function}[TF]{\gtl_pop_left_item:NN, \gtl_gpop_left_item:NN} +% \begin{syntax} +% \cs{gtl_pop_left_item:NNTF} \meta{gtl~var} \meta{tl~var} +% \Arg{true~code} \Arg{false~code} +% \end{syntax} +% Stores the first item of \meta{gtl~var} in \meta{tl~var}, locally, +% and removes it from \meta{gtl~var}, together with any space before +% it. If there is no such item, the \meta{gtl~var} is not affected, +% and the meta{tl~var} may or may not be affected. +% \end{function} +% +% \begin{function}[EXP]{\gtl_left_text:NF} +% \begin{syntax} +% \cs{gtl_left_text:NF} \meta{gtl~var} \Arg{false code} +% \end{syntax} +% Starting from the first token in \meta{gtl~var}, this function finds +% a pattern of the form \meta{tokens_1} \Arg{tokens_2}, where the +% \meta{tokens_1} contain no begin-group nor end-group characters, +% then leaves \meta{tokens_1} \Arg{tokens_2} in the input stream, +% within \cs{exp_not:n}. If no such pattern exists (this happens if +% the result of \cs{gtl_left_tl:N} contains no brace group), the +% \meta{false code} is run instead. +% \end{function} +% +% \begin{function}{\gtl_pop_left_text:N, \gtl_gpop_left_text:N} +% \begin{syntax} +% \cs{gtl_pop_left_text:N} \meta{gtl~var} +% \end{syntax} +% Starting from the first token in \meta{gtl~var}, this function finds +% a pattern of the form \meta{tokens_1} \Arg{tokens_2}, where the +% \meta{tokens_1} contain no begin-group nor end-group characters, +% then removes \meta{tokens_1} \Arg{tokens_2} from \meta{gtl~var}. If +% no such pattern exists (this happens if the result of +% \cs{gtl_left_tl:N} contains no brace group), the \meta{gtl~var} is +% not modified instead. +% \end{function} +% +% \subsection{Working with the contents of extended token lists} +% +% \begin{function}[EXP]{\gtl_count_tokens:N} +% \begin{syntax} +% \cs{gtl_count_tokens:N} \meta{gtl~var} +% \end{syntax} +% Counts the number of tokens in the \meta{gtl~var} and leaves this +% information in the input stream. +% \end{function} +% +% \begin{function}[EXP]{\gtl_extra_begin:N, \gtl_extra_end:N} +% \begin{syntax} +% \cs{gtl_extra_begin:N} \meta{gtl~var} +% \end{syntax} +% Counts the number of explicit extra begin-group (or end-group) +% characters in the \meta{gtl~var} and leaves this information in the +% input stream. +% \end{function} +% +% \begin{function}{\gtl_show:N} +% \begin{syntax} +% \cs{gtl_show:N} \meta{gtl~var} +% \end{syntax} +% Displays the content of the \meta{gtl~var} on the terminal. +% \end{function} +% +% \begin{function}[EXP]{\gtl_to_str:N} +% \begin{syntax} +% \cs{gtl_to_str:N} \meta{gtl~var} +% \end{syntax} +% Converts the content of the \meta{gtl~var} into a series of +% characters with category code $12$ (other) with the exception of +% spaces, which retain category code $10$ (space). This string is +% then left in the input stream. +% \end{function} +% +% \subsection{Constant extended token lists} +% +% \begin{variable}{\c_empty_gtl} +% Constant that is always empty. +% \end{variable} +% +% \begin{variable}{\c_group_begin_gtl} +% An explicit begin-group character contained in an extended token +% list. +% \end{variable} +% +% \begin{variable}{\c_group_end_gtl} +% An explicit end-group character contained in an extended token list. +% \end{variable} +% +% \subsection{Future perhaps} +% +% \begin{itemize} +% \item Test if a token appears in an extended token list. +% \item Test if an extended token list appears in another. +% \item Remove an extended token list from another, once or every time +% it appears. +% \item Replace an extended token list by another in a third: once, or +% every time it appears. +% \item Case statement. +% \item Mapping? +% \item Inserting an extended token list into the input stream, with all +% its glorious unbalanced braces. +% \item Convert in various ways to a token list. +% \item Reverse the order of tokens. +% \item Extract a token given its position. +% \item Extract a range of tokens given their position. +% \item Trim spaces. +% \item Crazy idea below. +% \end{itemize} +% +% We could add (with lots of work) the expandable function +% \begin{syntax} +% \cs{gtl_concat:nF} +% \{ +% \Arg{tl_1} \Arg{start_1} \Arg{stop_1} +% \Arg{tl_2} \Arg{start_2} \Arg{stop_2} +% \ldots{} +% \Arg{tl_n} \Arg{start_n} \Arg{stop_n} +% \} +% \Arg{false code} +% \end{syntax} +% For each triplet, this function builds the sub-token list of <tl_i> +% corresponding to the tokens ranging from position <start_i> to +% position <stop_i> of <tl_i>. The results obtained for each triplet +% are then concatenated. If nothing bad happens (see below), the +% concatenation is left in the input stream, and the <false code> is +% removed. Two cases can lead to running the <false code> (and dropping +% the first argument altogether). The first case is when the number of +% brace groups in \cs{gtl_concat:nF} is not a multiple of 3. The second +% case is when the concatenation gives rise to an unbalanced token list: +% then the result is not a valid token list. Note that each part is +% allowed to be unbalanced: only the full result must be balanced. +% +% \end{documentation} +% +% \begin{implementation} +% +% \section{\pkg{gtl} implementation} +% +% Some support packages are loaded first, then we declare the package's +% name, date, version, and purpose. +% +% \begin{macrocode} +%<*package> +% \end{macrocode} +% +% \begin{macrocode} +\RequirePackage{expl3}[2013/07/01] +\ProvidesExplPackage + {gtl} {2013/07/28} {0.0a} {Manipulate unbalanced lists of tokens} +% \end{macrocode} +% +% \begin{macrocode} +%<@@=gtl> +% \end{macrocode} +% +% \subsection{Helpers} +% +% \begin{macrocode} +\cs_generate_variant:Nn \use:nn { no } +% \end{macrocode} +% +% \begin{macro}[EXP, int]{\@@_exp_not_n:N} +% Used in one case where we need to prevent expansion of a token +% within an |x|-expanding definition. Using \cs{exp_not:N} there +% would fail when the argument is a macro parameter character. +% \begin{macrocode} +\cs_new:Npn \@@_exp_not_n:N #1 { \exp_not:n {#1} } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}[EXP, int]{\@@_brace:nn, \@@_brace_swap:nn} +% Those functions are used to add some tokens, |#1|, to an item |#2| +% in an extended token list: \cs{@@_brace:nn} adds tokens on the left, +% while \cs{@@_brace_swap:nn} adds them on the right. +% \begin{macrocode} +\cs_new:Npn \@@_brace:nn #1#2 { { #1 #2 } } +\cs_new:Npn \@@_brace_swap:nn #1#2 { { #2 #1 } } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}[EXP,aux]{\@@_strip_nil_mark:w,} +% \begin{macro}[EXP,aux]{\@@_strip_nil_mark_aux:w} +% Removes the following \cs{q_nil} \cs{q_mark} without losing any +% braces, and places the result into \cs{exp_not:n}. +% \begin{macrocode} +\cs_new_nopar:Npn \@@_strip_nil_mark:w + { \@@_strip_nil_mark_aux:w \prg_do_nothing: } +\cs_new:Npn \@@_strip_nil_mark_aux:w #1 \q_nil \q_mark + { \exp_not:o {#1} } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \subsection{Structure of extended token lists} +% +% Token lists must have balanced braces (or rather, begin-group and +% end-group characters). Extended token lists lift this requirement, +% and can represent arbitrary lists of tokens. A list of tokens can +% fail to be balanced in two ways: one may encounter too many end-group +% characters near the beginning of the list, or too many begin-group +% characters near the end of the list. In fact, a list of tokens always +% has the form +% \begin{quote}\ttfamily +% \meta{b_1} \} \ldots{} \meta{b_n} \} +% \meta{c} +% \{ \meta{e_1} \ldots{} \{ \meta{e_p} +% \end{quote} +% where the \meta{b_i}, \meta{c}, and \meta{e_i} are all balanced token +% lists. This can be seen by listing the tokens, and keeping track of a +% counter, which starts at~$0$, and is incremented at each begin-group +% character, and decremented at each end-group character: then the +% \meta{b_i} are delimited by positions where the counter reaches a new +% minimum, whereas the \meta{e_i} are delimited by positions where the +% counter last takes a given negative value. Such a token list is +% stored as +% \begin{quote}\ttfamily +% \cs{s_@@} +% \{ \Arg{b_1} \ldots{} \Arg{b_n} \} +% \Arg{c} +% \{ \Arg{e_p} \ldots{} \Arg{e_1} \} +% \cs{s__stop} +% \end{quote} +% Note that the \meta{e_i} are in a reversed order, as this makes the +% ends of extended token lists more accessible. Balanced token lists +% have $n = p = 0$: the first and third parts are empty, while the +% second contains the tokens. +% +% \begin{variable}{\s_@@} +% This marker appears at the start of extended token lists. +% \begin{macrocode} +\__scan_new:N \s_@@ +% \end{macrocode} +% \end{variable} +% +% \begin{macro} +% { +% \gtl_set:Nn, \gtl_gset:Nn, \gtl_const:Nn, +% \gtl_set:Nx, \gtl_gset:Nx, \gtl_const:Nx +% } +% Storing a balanced token list into an extended token list variable +% simply means adding \cs{s_@@}, \cs{s__stop}, and two empty brace +% groups. +% \begin{macrocode} +\cs_new_protected_nopar:Npn \gtl_set:Nn { \@@_set:NNn \tl_set:Nn } +\cs_new_protected_nopar:Npn \gtl_gset:Nn { \@@_set:NNn \tl_gset:Nn } +\cs_new_protected_nopar:Npn \gtl_const:Nn { \@@_set:NNn \tl_const:Nn } +\cs_new_protected_nopar:Npn \gtl_set:Nx { \@@_set:NNn \tl_set:Nx } +\cs_new_protected_nopar:Npn \gtl_gset:Nx { \@@_set:NNn \tl_gset:Nx } +\cs_new_protected_nopar:Npn \gtl_const:Nx { \@@_set:NNn \tl_const:Nx } +\cs_new_protected:Npn \@@_set:NNn #1#2#3 + { #1 #2 { \s_@@ { } {#3} { } \s__stop } } +% \end{macrocode} +% \end{macro} +% +% \begin{variable}{\c_empty_gtl} +% An empty extended token list, obtained thanks to the +% \cs{gtl_const:Nn} function just defined. +% \begin{macrocode} +\gtl_const:Nn \c_empty_gtl { } +% \end{macrocode} +% \end{variable} +% +% \begin{variable}{\c_group_begin_gtl, \c_group_end_gtl} +% An extended token list with exactly one begin-group/end-group +% character. +% \begin{macrocode} +\tl_const:Nn \c_group_end_gtl { \s_@@ { { } } { } { } \s__stop } +\tl_const:Nn \c_group_begin_gtl { \s_@@ { } { } { { } } \s__stop } +% \end{macrocode} +% \end{variable} +% +% \subsection{Creating extended token list variables} +% +% \begin{macro}{\gtl_new:N} +% A new extended token list is created empty. +% \begin{macrocode} +\cs_new_protected:Npn \gtl_new:N #1 + { \cs_new_eq:NN #1 \c_empty_gtl } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\gtl_set_eq:NN, \gtl_gset_eq:NN} +% All the data about an extended token list is stored as a single +% token list, so copying is easy. +% \begin{macrocode} +\cs_new_eq:NN \gtl_set_eq:NN \tl_set_eq:NN +\cs_new_eq:NN \gtl_gset_eq:NN \tl_gset_eq:NN +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\gtl_clear:N, \gtl_gclear:N} +% Clearing an extended token list by setting it to the empty one. +% \begin{macrocode} +\cs_new_protected:Npn \gtl_clear:N #1 + { \gtl_set_eq:NN #1 \c_empty_gtl } +\cs_new_protected:Npn \gtl_gclear:N #1 + { \gtl_gset_eq:NN #1 \c_empty_gtl } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\gtl_clear_new:N, \gtl_gclear_new:N} +% If the variable exists, clear it. Otherwise declare it. +% \begin{macrocode} +\cs_new_protected:Npn \gtl_clear_new:N #1 + { \gtl_if_exist:NTF #1 { \gtl_clear:N #1 } { \gtl_new:N #1 } } +\cs_new_protected:Npn \gtl_gclear_new:N #1 + { \gtl_if_exist:NTF #1 { \gtl_gclear:N #1 } { \gtl_new:N #1 } } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}[EXP, pTF]{\gtl_if_exist:N} +% Again a copy of token list functions. +% \begin{macrocode} +\prg_new_eq_conditional:NNn \gtl_if_exist:N \tl_if_exist:N + { p , T , F , TF } +% \end{macrocode} +% \end{macro} +% +% \subsection{Adding data to extended token list variables} +% +% \begin{macro}{\gtl_put_left:Nn, \gtl_gput_left:Nn} +% \begin{macro}[aux, rEXP]{\@@_put_left:wn} +% \begin{macrocode} +\cs_new_protected:Npn \gtl_put_left:Nn #1#2 + { \tl_set:Nx #1 { \exp_after:wN \@@_put_left:wn #1 {#2} } } +\cs_new_protected:Npn \gtl_gput_left:Nn #1#2 + { \tl_gset:Nx #1 { \exp_after:wN \@@_put_left:wn #1 {#2} } } +\cs_new:Npn \@@_put_left:wn \s_@@ #1#2#3 \s__stop #4 + { + \tl_if_empty:nTF {#1} + { \exp_not:n { \s_@@ { } { #4 #2 } {#3} \s__stop } } + { + \s_@@ + { \exp_not:o { \@@_brace:nn {#4} #1 } } + { \exp_not:n {#2} } + { \exp_not:n {#3} } + \s__stop + } + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\gtl_put_right:Nn, \gtl_gput_right:Nn} +% \begin{macro}[aux, rEXP]{\@@_put_right:wn} +% \begin{macrocode} +\cs_new_protected:Npn \gtl_put_right:Nn #1#2 + { \tl_set:Nx #1 { \exp_after:wN \@@_put_right:wn #1 {#2} } } +\cs_new_protected:Npn \gtl_gput_right:Nn #1#2 + { \tl_gset:Nx #1 { \exp_after:wN \@@_put_right:wn #1 {#2} } } +\cs_new:Npn \@@_put_right:wn \s_@@ #1#2#3 \s__stop #4 + { + \tl_if_empty:nTF {#3} + { \exp_not:n { \s_@@ {#1} { #2 #4 } { } \s__stop } } + { + \s_@@ + { \exp_not:n {#1} } + { \exp_not:n {#2} } + { \exp_not:o { \@@_brace_swap:nn {#4} #3 } } + \s__stop + } + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\gtl_concat:NNN, \gtl_gconcat:NNN} +% \begin{macro}[rEXP, aux] +% { +% \@@_concat:ww, +% \@@_concat_aux:nnnnnn, +% \@@_concat_auxi:nnnnnn, +% \@@_concat_auxii:nnnnnn, +% \@@_concat_auxiii:w, +% \@@_concat_auxiv:nnnn, +% \@@_concat_auxv:wnwnn, +% \@@_concat_auxvi:nnwnwnn +% } +% Concatenating two lists of tokens of the form +% \begin{quote}\ttfamily +% \cs{s_@@} +% \{ \Arg{b_1} \ldots{} \Arg{b_n} \} +% \Arg{c} +% \{ \Arg{e_p} \ldots{} \Arg{e_1} \} +% \cs{s__stop} +% \end{quote} +% is not an easy task. The \meta{e} parts of the first join with the +% \meta{b} parts of the second to make balanced pairs, and the +% follow-up depends on whether there were more \meta{e} parts or more +% \meta{b} parts. +% \begin{macrocode} +\cs_new_protected:Npn \gtl_concat:NNN #1#2#3 + { \tl_set:Nx #1 { \exp_last_two_unbraced:Noo \@@_concat:ww #2 #3 } } +\cs_new_protected:Npn \gtl_gconcat:NNN #1#2#3 + { \tl_gset:Nx #1 { \exp_last_two_unbraced:Noo \@@_concat:ww #2 #3 } } +\cs_new:Npn \@@_concat:ww \s_@@ #1#2#3 \s__stop \s_@@ #4#5#6 \s__stop + { + \tl_if_blank:nTF {#3} + { + \tl_if_blank:nTF {#4} + { \@@_concat_aux:nnnnnn } + { \@@_concat_auxi:nnnnnn } + } + { + \tl_if_blank:nTF {#4} + { \@@_concat_auxii:nnnnnn } + { \@@_concat_auxiv:nnnn } + } + {#1} {#2} {#3} {#4} {#5} {#6} + \s__stop + } +\cs_new:Npn \@@_concat_aux:nnnnnn #1#2#3#4#5#6 + { \exp_not:n { \s_@@ {#1} { #2 #5 } {#6} } } +\cs_new:Npn \@@_concat_auxi:nnnnnn #1#2#3#4#5#6 + { + \s_@@ + { + \exp_not:n {#1} + \exp_not:f + { \@@_concat_auxiii:w \@@_brace:nn {#2} #4 ~ \q_stop } + } + { \exp_not:n {#5} } + { \exp_not:n {#6} } + } +\cs_new:Npn \@@_concat_auxii:nnnnnn #1#2#3#4#5#6 + { + \s_@@ + { \exp_not:n {#1} } + { \exp_not:n {#2} } + { + \exp_not:n {#6} + \exp_not:f + { \@@_concat_auxiii:w \@@_brace_swap:nn {#5} #3 ~ \q_stop } + } + } +\cs_new:Npn \@@_concat_auxiii:w #1 ~ #2 \q_stop {#1} +\cs_new:Npn \@@_concat_auxiv:nnnn #1#2#3#4 + { + \tl_if_single:nTF {#3} + { \@@_concat_auxv:wnwnn } + { \@@_concat_auxvi:nnwnwnn } + #3 ~ \q_mark #4 ~ \q_mark {#1} {#2} + } +\cs_new:Npn \@@_concat_auxv:wnwnn + #1#2 \q_mark #3#4 \q_mark #5#6 + { + \@@_concat:ww + \s_@@ {#5} { #6 { #1 #3 } } { } \s__stop + \s_@@ {#4} + } +\cs_new:Npn \@@_concat_auxvi:nnwnwnn + #1#2#3 \q_mark #4#5 \q_mark #6#7 + { + \@@_concat:ww + \s_@@ {#6} {#7} { { #2 { #1 #4 } } #3 } \s__stop + \s_@@ {#5} + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \subsection{Showing extended token lists} +% +% ^^A todo: document \gtl_to_str:n +% \begin{macro}[EXP]{\gtl_to_str:N, \gtl_to_str:n} +% \begin{macro}[EXP, aux] +% { +% \@@_to_str:w, +% \@@_to_str_loopi:nnw, +% \@@_to_str_testi:nnw, +% \@@_to_str_endi:nnn, +% \@@_to_str_loopii:nnw, +% \@@_to_str_endii:nnw +% } +% \begin{macrocode} +\cs_new:Npn \gtl_to_str:N #1 { \exp_after:wN \@@_to_str:w #1 } +\cs_new:Npn \gtl_to_str:n #1 { \@@_to_str:w #1 } +\cs_new:Npn \@@_to_str:w \s_@@ #1#2#3 \s__stop + { \@@_to_str_loopi:nnw { } #1 \q_nil \q_mark {#2} {#3} } +\cs_new:Npx \@@_to_str_loopi:nnw #1#2 + { + \exp_not:N \quark_if_nil:nTF {#2} + { \exp_not:N \@@_to_str_testi:nnw {#1} {#2} } + { \exp_not:N \@@_to_str_loopi:nnw { #1 #2 \iow_char:N \} } } + } +\cs_new:Npx \@@_to_str_testi:nnw #1#2#3 \q_mark + { + \exp_not:N \tl_if_empty:nTF {#3} + { \exp_not:N \@@_to_str_endi:nnn {#1} } + { + \exp_not:N \@@_to_str_loopi:nnw + { #1 #2 \iow_char:N \} } #3 \exp_not:N \q_mark + } + } +\cs_new:Npn \@@_to_str_endi:nnn #1#2#3 + { \@@_to_str_loopii:nnw #3 { #1 #2 } \q_nil \q_stop } +\cs_new:Npx \@@_to_str_loopii:nnw #1#2 + { + \exp_not:N \quark_if_nil:nTF {#2} + { \exp_not:N \@@_to_str_testii:nnw {#1} {#2} } + { \exp_not:N \@@_to_str_loopii:nnw { #2 \iow_char:N \{ #1 } } + } +\cs_new:Npx \@@_to_str_testii:nnw #1#2#3 \q_stop + { + \exp_not:N \tl_if_empty:nTF {#3} + { \exp_not:N \tl_to_str:n {#1} } + { + \exp_not:N \@@_to_str_loopii:nnw + { #2 \iow_char:N \{ #1 } #3 \exp_not:N \q_stop + } + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\gtl_show:N} +% Display the variable name, then its string representation. +% \begin{macrocode} +\cs_new_protected:Npn \gtl_show:N #1 + { \exp_args:Nx \tl_show:n { \token_to_str:N #1 = \gtl_to_str:N #1 } } +% \end{macrocode} +% \end{macro} +% +% \subsection{Extended token list conditionals} +% +% \begin{macro}[EXP, pTF]{\gtl_if_eq:NN} +% Two extended token lists are equal if their contents agree. +% \begin{macrocode} +\prg_new_conditional:Npnn \gtl_if_eq:NN #1#2 { p , T , F , TF } + { \tl_if_eq:NNTF #1 #2 { \prg_return_true: } { \prg_return_false: } } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}[EXP, pTF]{\gtl_if_empty:N} +% An extended token list is empty if it is equal to the empty one. +% \begin{macrocode} +\prg_new_conditional:Npnn \gtl_if_empty:N #1 { p , T , F , TF } + { + \tl_if_eq:NNTF #1 \c_empty_gtl + { \prg_return_true: } { \prg_return_false: } + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}[EXP, pTF]{\gtl_if_tl:N} +% \begin{macro}[EXP,aux]{\@@_if_tl_return:w} +% \begin{macrocode} +\prg_new_conditional:Npnn \gtl_if_tl:N #1 { p , T , F , TF } + { \exp_after:wN \@@_if_tl_return:w #1 } +\cs_new:Npn \@@_if_tl_return:w \s_@@ #1#2#3 \s__stop + { + \tl_if_empty:nTF { #1 #3 } + { \prg_return_true: } { \prg_return_false: } + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}[EXP, pTF]{\gtl_if_single_token:N} +% \begin{macro}[EXP,aux]{\@@_if_single_token_return:w} +% \begin{macrocode} +\prg_new_conditional:Npnn \gtl_if_single_token:N #1 { p , T , F , TF } + { \exp_after:wN \@@_if_single_token_return:w #1 } +\cs_new:Npn \@@_if_single_token_return:w \s_@@ #1#2#3 \s__stop + { + \bool_if:nTF + { + \tl_if_empty_p:n {#2} + && \tl_if_single_p:n { #1 #3 } + && \tl_if_empty_p:o { \use:n #1 #3 } + || + \tl_if_single_token_p:n {#2} + && \tl_if_empty_p:n { #1 #3 } + } + { \prg_return_true: } + { \prg_return_false: } + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}[EXP,pTF]{\gtl_if_blank:N} +% \begin{macro}[EXP,aux]{\@@_if_blank_return:w} +% \begin{macrocode} +\prg_new_conditional:Npnn \gtl_if_blank:N #1 { p , T , F , TF } + { \exp_after:wN \@@_if_blank_return:w #1 } +\cs_new:Npn \@@_if_blank_return:w \s_@@ #1#2#3 \s__stop + { + \tl_if_blank:nTF { #1 #2 #3 } + { \prg_return_true: } + { \prg_return_false: } + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}[EXP,pTF] +% { +% \gtl_if_head_is_group_begin:N, +% \gtl_if_head_is_group_end:N, +% \gtl_if_head_is_space:N, +% \gtl_if_head_is_N_type:N, +% } +% \begin{macrocode} +\prg_new_conditional:Npnn \gtl_if_head_is_group_begin:N #1 + { p , T , F , TF } + { + \exp_after:wN \@@_head:wnnnnn #1 + { \prg_return_false: } + { \prg_return_true: } + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_false: \use_none:n } + } +\prg_new_conditional:Npnn \gtl_if_head_is_group_end:N #1 + { p , T , F , TF } + { + \exp_after:wN \@@_head:wnnnnn #1 + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_true: } + { \prg_return_false: } + { \prg_return_false: \use_none:n } + } +\prg_new_conditional:Npnn \gtl_if_head_is_space:N #1 + { p , T , F , TF } + { + \exp_after:wN \@@_head:wnnnnn #1 + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_true: } + { \prg_return_false: \use_none:n } + } +\prg_new_conditional:Npnn \gtl_if_head_is_N_type:N #1 + { p , T , F , TF } + { + \exp_after:wN \@@_head:wnnnnn #1 + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_true: \use_none:n } + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}[EXP, pTF]{\gtl_if_head_eq_catcode:NN} +% \begin{macro}[EXP, pTF]{\gtl_if_head_eq_charcode:NN} +% \begin{macro}[EXP, aux]{\@@_if_head_eq_code_return:NNN} +% In the empty case, |?| can match with |#2|, but then +% \cs{use_none:nn} gets rid of \cs{prg_return_true:} and \cs{else:}, +% to correctly leave \cs{prg_return_false:}. We could not simplify +% this by placing the \cs{exp_not:N} |#2| after the construction +% involving~|#1|, because |#2|~must be taken into the \TeX{} primitive +% test, in case |#2|~itself is a primitive \TeX{} conditional, which +% would mess up conditional nesting. +% \begin{macrocode} +\prg_new_conditional:Npnn \gtl_if_head_eq_catcode:NN #1#2 + { p , T , F , TF } + { \@@_if_head_eq_code_return:NNN \if_catcode:w #1#2 } +\prg_new_conditional:Npnn \gtl_if_head_eq_charcode:NN #1#2 + { p , T , F , TF } + { \@@_if_head_eq_code_return:NNN \if_charcode:w #1#2 } +\cs_new:Npn \@@_if_head_eq_code_return:NNN #1#2#3 + { + #1 + \exp_not:N #3 + \exp_after:wN \@@_head:wnnnnn #2 + { ? \use_none:nn } + { \c_group_begin_token } + { \c_group_end_token } + { \c_space_token } + { \exp_not:N } + \prg_return_true: + \else: + \prg_return_false: + \fi: + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% \end{macro} +% +% \begin{macro}[EXP, pTF]{\gtl_if_head_eq_meaning:NN} +% \begin{macro}[EXP, aux]{\@@_if_head_eq_meaning_return:NN} +% \begin{macrocode} +\prg_new_conditional:Npnn \gtl_if_head_eq_meaning:NN #1#2 + { p , T , F , TF } + { \@@_if_head_eq_meaning_return:NN #1#2 } +\cs_new:Npn \@@_if_head_eq_meaning_return:NN #1#2 + { + \exp_after:wN \@@_head:wnnnnn #1 + { \if_false: } + { \if_meaning:w #2 \c_group_begin_token } + { \if_meaning:w #2 \c_group_end_token } + { \if_meaning:w #2 \c_space_token } + { \if_meaning:w #2 } + \prg_return_true: + \else: + \prg_return_false: + \fi: + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \subsection{First token of an extended token list} +% +% \begin{macro}[EXP, int]{\@@_head:wnnnnn} +% \begin{macro}[EXP, aux]{\@@_head_aux:nwnnnn} +% \begin{macro}[EXP, aux]{\@@_head_auxii:N, \@@_head_auxiii:Nnn} +% This function performs |#4|~if the \texttt{gtl} is empty, |#5|~if it +% starts with a begin-group character, |#6|~if it starts with an +% end-group character, |#7|~if it starts with a space, and in other +% cases (when the first token is |N|-type), it performs |#8|~followed +% by the first token. +% \begin{macrocode} +\cs_new:Npn \@@_head:wnnnnn \s_@@ #1#2#3 \s__stop #4#5#6#7#8 + { + \tl_if_empty:nTF {#1} + { + \tl_if_empty:nTF {#2} + { \tl_if_empty:nTF {#3} {#4} {#5} } + { \@@_head_aux:nwnnnn {#2} \q_stop {#5} {#6} {#7} {#8} } + } + { \@@_head_aux:nwnnnn #1 \q_stop {#5} {#6} {#7} {#8} } + } +\cs_new:Npn \@@_head_aux:nwnnnn #1#2 \q_stop #3#4#5#6 + { + \tl_if_head_is_group:nTF {#1} {#3} + { + \tl_if_empty:nTF {#1} {#4} + { + \tl_if_head_is_space:nTF {#1} {#5} + { \if_false: { \fi: \@@_head_auxii:N #1 } {#6} } + } + } + } +\cs_new:Npn \@@_head_auxii:N #1 + { + \exp_after:wN \@@_head_auxiii:Nnn + \exp_after:wN #1 + \exp_after:wN { \if_false: } \fi: + } +\cs_new:Npn \@@_head_auxiii:Nnn #1#2#3 { #3 #1 } +% \end{macrocode} +% \end{macro} +% \end{macro} +% \end{macro} +% +% \begin{macro}[EXP]{\gtl_head:N} +% If |#1| is empty, do nothing. If it starts with a begin-group +% character or an end-group character leave the appropriate brace +% (thanks to \cs{if_false:} tricks). If it starts with a space, leave +% that, and finally if it starts with a normal token, leave it, within +% \cs{exp_not:n}. +% \begin{macrocode} +\cs_new:Npn \gtl_head:N #1 + { + \exp_after:wN \@@_head:wnnnnn #1 + { } + { \exp_after:wN { \if_false: } \fi: } + { \if_false: { \fi: } } + { ~ } + { \@@_exp_not_n:N } + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}[EXP]{\gtl_head_do:NN} +% Similar to \cs{gtl_head:N}, but inserting |#2| before the resulting token. +% \begin{macrocode} +\cs_new:Npn \gtl_head_do:NN #1#2 + { + \exp_after:wN \@@_head:wnnnnn #1 + { #2 \q_no_value } + { \exp_after:wN #2 \exp_after:wN { \if_false: } \fi: } + { \if_false: { \fi: #2 } } + { #2 ~ } + { #2 } + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\gtl_get_left:NN} +% \begin{macrocode} +\cs_new_protected:Npn \gtl_get_left:NN #1#2 + { + \exp_after:wN \@@_head:wnnnnn #1 + { \gtl_set:Nn #2 { \q_no_value } } + { \gtl_set_eq:NN #2 \c_group_begin_gtl } + { \gtl_set_eq:NN #2 \c_group_end_gtl } + { \gtl_set:Nn #2 { ~ } } + { \gtl_set:Nn #2 } + } +% \end{macrocode} +% \end{macro} +% +% \begin{macro}{\gtl_pop_left:N, \gtl_gpop_left:N} +% \begin{macro}[aux, rEXP] +% { +% \@@_pop_left:w, +% \@@_pop_left_auxi:n, +% \@@_pop_left_auxii:nnnw, +% \@@_pop_left_auxiii:nnnw, +% \@@_pop_left_auxiv:nn, +% \@@_pop_left_auxv:nnn, +% \@@_pop_left_auxvi:n +% } +% \begin{macrocode} +\cs_new_protected:Npn \gtl_pop_left:N #1 + { \tl_set:Nx #1 { \exp_after:wN \@@_pop_left:w #1 } } +\cs_new_protected:Npn \gtl_gpop_left:N #1 + { \tl_gset:Nx #1 { \exp_after:wN \@@_pop_left:w #1 } } +\cs_new:Npn \@@_pop_left:w \s_@@ #1#2#3 \s__stop + { + \tl_if_empty:nTF {#1} + { + \tl_if_empty:nTF {#2} + { \@@_pop_left_auxi:n {#3} } + { \@@_pop_left_auxiv:nn {#2} {#3} } + } + { \@@_pop_left_auxv:nnn {#1} {#2} {#3} } + } +\cs_new:Npn \@@_pop_left_auxi:n #1 + { + \s_@@ + { } + \@@_pop_left_auxii:nnnw { } { } #1 \q_nil \q_stop + \s__stop + } +\cs_new:Npn \@@_pop_left_auxii:nnnw #1#2#3 + { + \quark_if_nil:nTF {#3} + { \@@_pop_left_auxiii:nnnw {#1} {#2} {#3} } + { \@@_pop_left_auxii:nnnw { #1 #2 } { {#3} } } + } +\cs_new:Npn \@@_pop_left_auxiii:nnnw #1#2#3#4 \q_stop + { + \tl_if_empty:nTF {#4} + { \exp_not:n { #2 {#1} } } + { \@@_pop_left_auxii:nnnw { #1 #2 } { {#3} } } + } +\cs_new:Npn \@@_pop_left_auxiv:nn #1#2 + { + \s_@@ + { \tl_if_head_is_group:nT {#1} { { \tl_head:n {#1} } } } + { \tl_if_head_is_space:nTF {#1} { \exp_not:f } { \tl_tail:n } {#1} } + { \exp_not:n {#2} } + \s__stop + } +\cs_new:Npn \@@_pop_left_auxv:nnn #1#2#3 + { + \s_@@ + { \if_false: { \fi: \@@_pop_left_auxvi:n #1 } } + { \exp_not:n {#2} } + { \exp_not:n {#3} } + \s__stop + } +\cs_new:Npn \@@_pop_left_auxvi:n #1 + { + \tl_if_empty:nF {#1} + { + \tl_if_head_is_group:nT {#1} { { \tl_head:n {#1} } } + { + \tl_if_head_is_space:nTF {#1} + { \exp_not:f } { \tl_tail:n } {#1} + } + } + \exp_after:wN \exp_not:n \exp_after:wN { \if_false: } \fi: + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\gtl_pop_left:NN, \gtl_gpop_left:NN} +% Getting the first token and removing it from the extended token list +% is done in two steps. +% \begin{macrocode} +\cs_new_protected:Npn \gtl_pop_left:NN #1#2 + { + \gtl_get_left:NN #1 #2 + \gtl_pop_left:N #1 + } +\cs_new_protected:Npn \gtl_gpop_left:NN #1#2 + { + \gtl_get_left:NN #1 #2 + \gtl_gpop_left:N #1 + } +% \end{macrocode} +% \end{macro} +% +% \subsection{Longest token list starting an extended token list} +% +% \begin{macro}[EXP]{\gtl_left_tl:N} +% \begin{macro}[EXP,aux]{\@@_left_tl:w} +% \begin{macrocode} +\cs_new:Npn \gtl_left_tl:N #1 + { \exp_after:wN \@@_left_tl:w #1 } +\cs_new:Npn \@@_left_tl:w \s_@@ #1#2#3 \s__stop + { \tl_if_empty:nTF {#1} { \exp_not:n {#2} } { \tl_head:n {#1} } } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\gtl_pop_left_tl:N, \gtl_gpop_left_tl:N} +% \begin{macrocode} +\cs_new_protected:Npn \gtl_pop_left_tl:N #1 + { \tl_set:Nx #1 { \exp_after:wN \@@_pop_left_tl:w #1 } } +\cs_new_protected:Npn \gtl_gpop_left_tl:N #1 + { \tl_gset:Nx #1 { \exp_after:wN \@@_pop_left_tl:w #1 } } +\cs_new:Npn \@@_pop_left_tl:w \s_@@ #1#2#3 \s__stop + { + \s_@@ + \tl_if_empty:nTF {#1} + { { } { } } + { + { { } \tl_tail:n {#1} } + { \exp_not:n {#2} } + } + { \exp_not:n {#3} } + \s__stop + } +% \end{macrocode} +% \end{macro} +% +% \subsection{First item of an extended token list} +% +% \begin{macro}[EXP]{\gtl_left_item:NF} +% \begin{macro}[aux, EXP]{\@@_left_item:wF, \@@_left_item_auxi:nwF} +% The left-most item of an extended token list is the head of its left +% token list. The code thus starts like \cs{gtl_left_tl:N}. It ends +% with a check to test if we should use the head, or issue the false +% code. +% \begin{macrocode} +\cs_new:Npn \gtl_left_item:NF #1 + { \exp_after:wN \@@_left_item:wF #1 } +\cs_new:Npn \@@_left_item:wF \s_@@ #1#2#3 \s__stop + { \@@_left_item_auxi:nwF #1 {#2} \q_stop } +\cs_new:Npn \@@_left_item_auxi:nwF #1#2 \q_stop #3 + { \tl_if_blank:nTF {#1} {#3} { \tl_head:n {#1} } } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}[TF]{\gtl_pop_left_item:NN, \gtl_gpop_left_item:NN} +% \begin{macro}[aux] +% {\@@_pop_left_item:wNNN, \@@_pop_left_item_aux:nwnnNNN} +% If there is no extra end-group characters, and if the balanced part +% is blank, we cannot extract an item: return \texttt{false}. If the +% balanced part is not blank, store its first item into |#4|, and +% store the altered generalized token list into~|#6|, locally or +% globally. Otherwise, pick out the part before the first extra +% end-group character as |#1| of the second auxiliary, and do +% essentially the same: if it is blank, there is no item, and if it is +% not blank, pop its first item. +% \begin{macrocode} +\prg_new_protected_conditional:Npnn \gtl_pop_left_item:NN #1#2 { TF , T , F } + { \exp_after:wN \@@_pop_left_item:wNNN #1#2 \tl_set:Nx #1 } +\prg_new_protected_conditional:Npnn \gtl_gpop_left_item:NN #1#2 { TF , T , F } + { \exp_after:wN \@@_pop_left_item:wNNN #1#2 \tl_gset:Nx #1 } +\cs_new_protected:Npn \@@_pop_left_item:wNNN + \s_@@ #1#2#3 \s__stop #4#5#6 + { + \tl_if_empty:nTF {#1} + { + \tl_if_blank:nTF {#2} { \prg_return_false: } + { + \tl_set:Nx #4 { \tl_head:n {#2} } + #5 #6 + { + \s_@@ { } { \tl_tail:n {#2} } + { \exp_not:n {#3} } \s__stop + } + \prg_return_true: + } + } + { + \@@_pop_left_item_aux:nwnnNNN #1 \q_nil \q_stop + {#2} {#3} #4 #5 #6 + } + } +\cs_new_protected:Npn \@@_pop_left_item_aux:nwnnNNN + #1#2 \q_stop #3#4#5#6#7 + { + \tl_if_blank:nTF {#1} { \prg_return_false: } + { + \tl_set:Nx #5 { \tl_head:n {#1} } + #6 #7 + { + \s_@@ + { { \tl_tail:n {#1} } \@@_strip_nil_mark:w #2 \q_mark } + { \exp_not:n {#3} } + { \exp_not:n {#4} } + \s__stop + } + \prg_return_true: + } + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \subsection{First group in an extended token list} +% +% The functions of this section extract from an extended token list the +% tokens that would be absorbed after |\def\foo|, namely tokens with no +% begin-group nor end-group characters, followed by one group. Those +% tokens are either left in the input stream or stored in a token list +% variable, and the |pop| functions also remove those tokens from the +% extended token list variable. +% +% \begin{macro}[EXP]{\gtl_left_text:NF} +% \begin{macro}[aux, EXP] +% { +% \@@_left_text:wF, +% \@@_left_text_auxi:nwF, +% \@@_left_text_auxii:wnwF, +% \@@_left_text_auxiii:nnwF, +% } +% \begin{macrocode} +\cs_new:Npn \gtl_left_text:NF #1 + { \exp_after:wN \@@_left_text:wF #1 } +\cs_new:Npn \@@_left_text:wF \s_@@ #1#2#3 \s__stop + { + \tl_if_empty:nTF {#1} + { \@@_left_text_auxi:nwF {#2} \q_stop } + { \@@_left_text_auxi:nwF #1 \q_stop } + } +\cs_new:Npn \@@_left_text_auxi:nwF #1#2 \q_stop + { \@@_left_text_auxii:wnwF #1 \q_mark { } \q_mark \q_stop } +\cs_new:Npn \@@_left_text_auxii:wnwF #1 # + { \@@_left_text_auxiii:nnwF {#1} } +\cs_new:Npn \@@_left_text_auxiii:nnwF #1#2 #3 \q_mark #4 \q_stop #5 + { \tl_if_empty:nTF {#4} {#5} { \exp_not:n { #1 {#2} } } } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}{\gtl_pop_left_text:N, \gtl_gpop_left_text:N} +% \begin{macro}[aux, rEXP] +% { +% \@@_pop_left_text:w, +% \@@_pop_left_text_auxi:n, +% \@@_pop_left_text_auxii:wnw, +% \@@_pop_left_text_auxiii:nnw, +% \@@_pop_left_text_auxiv:nw, +% } +% \begin{macrocode} +\cs_new_protected:Npn \gtl_pop_left_text:N #1 + { \tl_set:Nx #1 { \exp_after:wN \@@_pop_left_text:w #1 } } +\cs_new_protected:Npn \gtl_gpop_left_text:N #1 + { \tl_gset:Nx #1 { \exp_after:wN \@@_pop_left_text:w #1 } } +\cs_new:Npn \@@_pop_left_text:w \s_@@ #1#2#3 \s__stop + { + \s_@@ + \tl_if_empty:nTF {#1} + { + { } + { \@@_pop_left_text_auxi:n {#2} } + } + { + { \@@_pop_left_text_auxiv:nw #1 \q_nil \q_mark } + { \exp_not:n {#2} } + } + { \exp_not:n {#3} } + \s__stop + } +\cs_new:Npn \@@_pop_left_text_auxi:n #1 + { + \@@_pop_left_text_auxii:wnw #1 + \q_nil \q_mark { } \q_mark \q_stop + } +\cs_new:Npn \@@_pop_left_text_auxii:wnw #1 # + { \@@_pop_left_text_auxiii:nnw {#1} } +\cs_new:Npn \@@_pop_left_text_auxiii:nnw #1#2#3 \q_mark #4 \q_stop + { + \tl_if_empty:nTF {#4} + { \@@_strip_nil_mark:w #1 } + { \@@_strip_nil_mark:w #3 \q_mark } + } +\cs_new:Npn \@@_pop_left_text_auxiv:nw #1 + { + { \@@_pop_left_text_auxi:n {#1} } + \@@_strip_nil_mark:w + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \subsection{Counting tokens} +% +% \begin{macro}[EXP, int]{\@@_tl_count:n} +% \begin{macro}[EXP, aux]{\@@_tl_count_loop:n, \@@_tl_count_test:w} +% A more robust version of \cs{tl_count:n}, which will however break +% if the token list contains \cs{q_stop} at the outer brace level. +% This cannot happen when \cs{@@_tl_count:n} is called with lists of +% braced items. The technique is to loop, and when seeing +% \cs{q_mark}, make sure that this is really the end of the list. +% \begin{macrocode} +\cs_new:Npn \@@_tl_count:n #1 + { \int_eval:n { \c_zero \@@_tl_count_loop:n #1 \q_nil \q_stop } } +\cs_new:Npn \@@_tl_count_loop:n #1 + { + \quark_if_nil:nTF {#1} + { \@@_tl_count_test:w } + { + \c_one \@@_tl_count_loop:n } + } +\cs_new:Npn \@@_tl_count_test:w #1 \q_stop + { \tl_if_empty:nF {#1} { + \c_one \@@_tl_count_loop:n #1 \q_stop } } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}[EXP]{\gtl_extra_begin:N, \gtl_extra_end:N} +% \begin{macro}[EXP, aux]{\@@_extra_begin:w, \@@_extra_end:w} +% Count the number of extra end-group or of extra begin-group +% characters in an extended token list. This is the number of items +% in the first or third brace groups. We cannot use \cs{tl_count:n}, +% as \pkg{gtl} is meant to be robust against inclusion of quarks. +% \begin{macrocode} +\cs_new:Npn \gtl_extra_end:N #1 + { \exp_after:wN \@@_extra_end:w #1 } +\cs_new:Npn \@@_extra_end:w \s_@@ #1#2#3 \s__stop + { \@@_tl_count:n {#1} } +\cs_new:Npn \gtl_extra_begin:N #1 + { \exp_after:wN \@@_extra_begin:w #1 } +\cs_new:Npn \@@_extra_begin:w \s_@@ #1#2#3 \s__stop + { \@@_tl_count:n {#3} } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \begin{macro}[EXP]{\gtl_count_tokens:N} +% \begin{macro}[aux, rEXP] +% { +% \@@_count_tokens:w, +% \@@_count_auxi:nw, +% \@@_count_auxii:w, +% \@@_count_auxiii:n +% } +% \begin{macrocode} +\cs_new:Npn \gtl_count_tokens:N #1 + { \exp_after:wN \@@_count_tokens:w #1 } +\cs_new:Npn \@@_count_tokens:w \s_@@ #1#2#3 \s__stop + { + \int_eval:n + { \c_minus_one \@@_count_auxi:nw #1 {#2} #3 \q_nil \q_stop } + } +\cs_new:Npn \@@_count_auxi:nw #1 + { + \quark_if_nil:nTF {#1} + { \@@_count_auxii:w } + { + + \c_one + \@@_count_auxiii:n {#1} + \@@_count_auxi:nw + } + } +\cs_new:Npn \@@_count_auxii:w #1 \q_stop + { + \tl_if_empty:nF {#1} + { + + \c_two + \@@_count_auxi:nw #1 \q_stop + } + } +\cs_new:Npn \@@_count_auxiii:n #1 + { + \tl_if_empty:nF {#1} + { + \tl_if_head_is_group:nTF {#1} + { + + \c_two + \exp_args:No \@@_count_auxiii:n { \use:n #1 } + } + { + + \c_one + \tl_if_head_is_N_type:nTF {#1} + { \exp_args:No \@@_count_auxiii:n { \use_none:n #1 } } + { \exp_args:Nf \@@_count_auxiii:n {#1} } + } + } + } +% \end{macrocode} +% \end{macro} +% \end{macro} +% +% \subsection{Messages} +% +% \begin{macrocode} +%</package> +% \end{macrocode} +% +% \end{implementation} +% +% \endinput diff --git a/Master/texmf-dist/source/latex/gtl/gtl.ins b/Master/texmf-dist/source/latex/gtl/gtl.ins new file mode 100644 index 00000000000..0f77d88503a --- /dev/null +++ b/Master/texmf-dist/source/latex/gtl/gtl.ins @@ -0,0 +1,23 @@ +\input l3docstrip.tex +\askforoverwritefalse + +\preamble + +Do not distribute a modified version of this file. + +Communicate any suggestions for changing this package +to Bruno Le Floch (blflatex@gmail.com). + +\endpreamble +% stop docstrip adding \endinput +\postamble +\endpostamble + +\keepsilent + +% the package +\generate{% + \file{gtl.sty} {\from{gtl.dtx} {package}}% +} + +\endbatchfile diff --git a/Master/texmf-dist/tex/latex/gtl/gtl.sty b/Master/texmf-dist/tex/latex/gtl/gtl.sty new file mode 100644 index 00000000000..8bd342609b0 --- /dev/null +++ b/Master/texmf-dist/tex/latex/gtl/gtl.sty @@ -0,0 +1,619 @@ +%% +%% This is file `gtl.sty', +%% generated with the docstrip utility. +%% +%% The original source files were: +%% +%% gtl.dtx (with options: `package') +%% +%% Do not distribute a modified version of this file. +%% +%% Communicate any suggestions for changing this package +%% to Bruno Le Floch (blflatex@gmail.com). +%% +%% File: gtl.dtx Copyright (C) 2013 Bruno Le Floch +%% +%% 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 +%% +%% ----------------------------------------------------------------------- +\RequirePackage{expl3}[2013/07/01] +\ProvidesExplPackage + {gtl} {2013/07/28} {0.0a} {Manipulate unbalanced lists of tokens} +\cs_generate_variant:Nn \use:nn { no } +\cs_new:Npn \__gtl_exp_not_n:N #1 { \exp_not:n {#1} } +\cs_new:Npn \__gtl_brace:nn #1#2 { { #1 #2 } } +\cs_new:Npn \__gtl_brace_swap:nn #1#2 { { #2 #1 } } +\cs_new_nopar:Npn \__gtl_strip_nil_mark:w + { \__gtl_strip_nil_mark_aux:w \prg_do_nothing: } +\cs_new:Npn \__gtl_strip_nil_mark_aux:w #1 \q_nil \q_mark + { \exp_not:o {#1} } +\__scan_new:N \s__gtl +\cs_new_protected_nopar:Npn \gtl_set:Nn { \__gtl_set:NNn \tl_set:Nn } +\cs_new_protected_nopar:Npn \gtl_gset:Nn { \__gtl_set:NNn \tl_gset:Nn } +\cs_new_protected_nopar:Npn \gtl_const:Nn { \__gtl_set:NNn \tl_const:Nn } +\cs_new_protected_nopar:Npn \gtl_set:Nx { \__gtl_set:NNn \tl_set:Nx } +\cs_new_protected_nopar:Npn \gtl_gset:Nx { \__gtl_set:NNn \tl_gset:Nx } +\cs_new_protected_nopar:Npn \gtl_const:Nx { \__gtl_set:NNn \tl_const:Nx } +\cs_new_protected:Npn \__gtl_set:NNn #1#2#3 + { #1 #2 { \s__gtl { } {#3} { } \s__stop } } +\gtl_const:Nn \c_empty_gtl { } +\tl_const:Nn \c_group_end_gtl { \s__gtl { { } } { } { } \s__stop } +\tl_const:Nn \c_group_begin_gtl { \s__gtl { } { } { { } } \s__stop } +\cs_new_protected:Npn \gtl_new:N #1 + { \cs_new_eq:NN #1 \c_empty_gtl } +\cs_new_eq:NN \gtl_set_eq:NN \tl_set_eq:NN +\cs_new_eq:NN \gtl_gset_eq:NN \tl_gset_eq:NN +\cs_new_protected:Npn \gtl_clear:N #1 + { \gtl_set_eq:NN #1 \c_empty_gtl } +\cs_new_protected:Npn \gtl_gclear:N #1 + { \gtl_gset_eq:NN #1 \c_empty_gtl } +\cs_new_protected:Npn \gtl_clear_new:N #1 + { \gtl_if_exist:NTF #1 { \gtl_clear:N #1 } { \gtl_new:N #1 } } +\cs_new_protected:Npn \gtl_gclear_new:N #1 + { \gtl_if_exist:NTF #1 { \gtl_gclear:N #1 } { \gtl_new:N #1 } } +\prg_new_eq_conditional:NNn \gtl_if_exist:N \tl_if_exist:N + { p , T , F , TF } +\cs_new_protected:Npn \gtl_put_left:Nn #1#2 + { \tl_set:Nx #1 { \exp_after:wN \__gtl_put_left:wn #1 {#2} } } +\cs_new_protected:Npn \gtl_gput_left:Nn #1#2 + { \tl_gset:Nx #1 { \exp_after:wN \__gtl_put_left:wn #1 {#2} } } +\cs_new:Npn \__gtl_put_left:wn \s__gtl #1#2#3 \s__stop #4 + { + \tl_if_empty:nTF {#1} + { \exp_not:n { \s__gtl { } { #4 #2 } {#3} \s__stop } } + { + \s__gtl + { \exp_not:o { \__gtl_brace:nn {#4} #1 } } + { \exp_not:n {#2} } + { \exp_not:n {#3} } + \s__stop + } + } +\cs_new_protected:Npn \gtl_put_right:Nn #1#2 + { \tl_set:Nx #1 { \exp_after:wN \__gtl_put_right:wn #1 {#2} } } +\cs_new_protected:Npn \gtl_gput_right:Nn #1#2 + { \tl_gset:Nx #1 { \exp_after:wN \__gtl_put_right:wn #1 {#2} } } +\cs_new:Npn \__gtl_put_right:wn \s__gtl #1#2#3 \s__stop #4 + { + \tl_if_empty:nTF {#3} + { \exp_not:n { \s__gtl {#1} { #2 #4 } { } \s__stop } } + { + \s__gtl + { \exp_not:n {#1} } + { \exp_not:n {#2} } + { \exp_not:o { \__gtl_brace_swap:nn {#4} #3 } } + \s__stop + } + } +\cs_new_protected:Npn \gtl_concat:NNN #1#2#3 + { \tl_set:Nx #1 { \exp_last_two_unbraced:Noo \__gtl_concat:ww #2 #3 } } +\cs_new_protected:Npn \gtl_gconcat:NNN #1#2#3 + { \tl_gset:Nx #1 { \exp_last_two_unbraced:Noo \__gtl_concat:ww #2 #3 } } +\cs_new:Npn \__gtl_concat:ww \s__gtl #1#2#3 \s__stop \s__gtl #4#5#6 \s__stop + { + \tl_if_blank:nTF {#3} + { + \tl_if_blank:nTF {#4} + { \__gtl_concat_aux:nnnnnn } + { \__gtl_concat_auxi:nnnnnn } + } + { + \tl_if_blank:nTF {#4} + { \__gtl_concat_auxii:nnnnnn } + { \__gtl_concat_auxiv:nnnn } + } + {#1} {#2} {#3} {#4} {#5} {#6} + \s__stop + } +\cs_new:Npn \__gtl_concat_aux:nnnnnn #1#2#3#4#5#6 + { \exp_not:n { \s__gtl {#1} { #2 #5 } {#6} } } +\cs_new:Npn \__gtl_concat_auxi:nnnnnn #1#2#3#4#5#6 + { + \s__gtl + { + \exp_not:n {#1} + \exp_not:f + { \__gtl_concat_auxiii:w \__gtl_brace:nn {#2} #4 ~ \q_stop } + } + { \exp_not:n {#5} } + { \exp_not:n {#6} } + } +\cs_new:Npn \__gtl_concat_auxii:nnnnnn #1#2#3#4#5#6 + { + \s__gtl + { \exp_not:n {#1} } + { \exp_not:n {#2} } + { + \exp_not:n {#6} + \exp_not:f + { \__gtl_concat_auxiii:w \__gtl_brace_swap:nn {#5} #3 ~ \q_stop } + } + } +\cs_new:Npn \__gtl_concat_auxiii:w #1 ~ #2 \q_stop {#1} +\cs_new:Npn \__gtl_concat_auxiv:nnnn #1#2#3#4 + { + \tl_if_single:nTF {#3} + { \__gtl_concat_auxv:wnwnn } + { \__gtl_concat_auxvi:nnwnwnn } + #3 ~ \q_mark #4 ~ \q_mark {#1} {#2} + } +\cs_new:Npn \__gtl_concat_auxv:wnwnn + #1#2 \q_mark #3#4 \q_mark #5#6 + { + \__gtl_concat:ww + \s__gtl {#5} { #6 { #1 #3 } } { } \s__stop + \s__gtl {#4} + } +\cs_new:Npn \__gtl_concat_auxvi:nnwnwnn + #1#2#3 \q_mark #4#5 \q_mark #6#7 + { + \__gtl_concat:ww + \s__gtl {#6} {#7} { { #2 { #1 #4 } } #3 } \s__stop + \s__gtl {#5} + } +\cs_new:Npn \gtl_to_str:N #1 { \exp_after:wN \__gtl_to_str:w #1 } +\cs_new:Npn \gtl_to_str:n #1 { \__gtl_to_str:w #1 } +\cs_new:Npn \__gtl_to_str:w \s__gtl #1#2#3 \s__stop + { \__gtl_to_str_loopi:nnw { } #1 \q_nil \q_mark {#2} {#3} } +\cs_new:Npx \__gtl_to_str_loopi:nnw #1#2 + { + \exp_not:N \quark_if_nil:nTF {#2} + { \exp_not:N \__gtl_to_str_testi:nnw {#1} {#2} } + { \exp_not:N \__gtl_to_str_loopi:nnw { #1 #2 \iow_char:N \} } } + } +\cs_new:Npx \__gtl_to_str_testi:nnw #1#2#3 \q_mark + { + \exp_not:N \tl_if_empty:nTF {#3} + { \exp_not:N \__gtl_to_str_endi:nnn {#1} } + { + \exp_not:N \__gtl_to_str_loopi:nnw + { #1 #2 \iow_char:N \} } #3 \exp_not:N \q_mark + } + } +\cs_new:Npn \__gtl_to_str_endi:nnn #1#2#3 + { \__gtl_to_str_loopii:nnw #3 { #1 #2 } \q_nil \q_stop } +\cs_new:Npx \__gtl_to_str_loopii:nnw #1#2 + { + \exp_not:N \quark_if_nil:nTF {#2} + { \exp_not:N \__gtl_to_str_testii:nnw {#1} {#2} } + { \exp_not:N \__gtl_to_str_loopii:nnw { #2 \iow_char:N \{ #1 } } + } +\cs_new:Npx \__gtl_to_str_testii:nnw #1#2#3 \q_stop + { + \exp_not:N \tl_if_empty:nTF {#3} + { \exp_not:N \tl_to_str:n {#1} } + { + \exp_not:N \__gtl_to_str_loopii:nnw + { #2 \iow_char:N \{ #1 } #3 \exp_not:N \q_stop + } + } +\cs_new_protected:Npn \gtl_show:N #1 + { \exp_args:Nx \tl_show:n { \token_to_str:N #1 = \gtl_to_str:N #1 } } +\prg_new_conditional:Npnn \gtl_if_eq:NN #1#2 { p , T , F , TF } + { \tl_if_eq:NNTF #1 #2 { \prg_return_true: } { \prg_return_false: } } +\prg_new_conditional:Npnn \gtl_if_empty:N #1 { p , T , F , TF } + { + \tl_if_eq:NNTF #1 \c_empty_gtl + { \prg_return_true: } { \prg_return_false: } + } +\prg_new_conditional:Npnn \gtl_if_tl:N #1 { p , T , F , TF } + { \exp_after:wN \__gtl_if_tl_return:w #1 } +\cs_new:Npn \__gtl_if_tl_return:w \s__gtl #1#2#3 \s__stop + { + \tl_if_empty:nTF { #1 #3 } + { \prg_return_true: } { \prg_return_false: } + } +\prg_new_conditional:Npnn \gtl_if_single_token:N #1 { p , T , F , TF } + { \exp_after:wN \__gtl_if_single_token_return:w #1 } +\cs_new:Npn \__gtl_if_single_token_return:w \s__gtl #1#2#3 \s__stop + { + \bool_if:nTF + { + \tl_if_empty_p:n {#2} + && \tl_if_single_p:n { #1 #3 } + && \tl_if_empty_p:o { \use:n #1 #3 } + || + \tl_if_single_token_p:n {#2} + && \tl_if_empty_p:n { #1 #3 } + } + { \prg_return_true: } + { \prg_return_false: } + } +\prg_new_conditional:Npnn \gtl_if_blank:N #1 { p , T , F , TF } + { \exp_after:wN \__gtl_if_blank_return:w #1 } +\cs_new:Npn \__gtl_if_blank_return:w \s__gtl #1#2#3 \s__stop + { + \tl_if_blank:nTF { #1 #2 #3 } + { \prg_return_true: } + { \prg_return_false: } + } +\prg_new_conditional:Npnn \gtl_if_head_is_group_begin:N #1 + { p , T , F , TF } + { + \exp_after:wN \__gtl_head:wnnnnn #1 + { \prg_return_false: } + { \prg_return_true: } + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_false: \use_none:n } + } +\prg_new_conditional:Npnn \gtl_if_head_is_group_end:N #1 + { p , T , F , TF } + { + \exp_after:wN \__gtl_head:wnnnnn #1 + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_true: } + { \prg_return_false: } + { \prg_return_false: \use_none:n } + } +\prg_new_conditional:Npnn \gtl_if_head_is_space:N #1 + { p , T , F , TF } + { + \exp_after:wN \__gtl_head:wnnnnn #1 + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_true: } + { \prg_return_false: \use_none:n } + } +\prg_new_conditional:Npnn \gtl_if_head_is_N_type:N #1 + { p , T , F , TF } + { + \exp_after:wN \__gtl_head:wnnnnn #1 + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_false: } + { \prg_return_true: \use_none:n } + } +\prg_new_conditional:Npnn \gtl_if_head_eq_catcode:NN #1#2 + { p , T , F , TF } + { \__gtl_if_head_eq_code_return:NNN \if_catcode:w #1#2 } +\prg_new_conditional:Npnn \gtl_if_head_eq_charcode:NN #1#2 + { p , T , F , TF } + { \__gtl_if_head_eq_code_return:NNN \if_charcode:w #1#2 } +\cs_new:Npn \__gtl_if_head_eq_code_return:NNN #1#2#3 + { + #1 + \exp_not:N #3 + \exp_after:wN \__gtl_head:wnnnnn #2 + { ? \use_none:nn } + { \c_group_begin_token } + { \c_group_end_token } + { \c_space_token } + { \exp_not:N } + \prg_return_true: + \else: + \prg_return_false: + \fi: + } +\prg_new_conditional:Npnn \gtl_if_head_eq_meaning:NN #1#2 + { p , T , F , TF } + { \__gtl_if_head_eq_meaning_return:NN #1#2 } +\cs_new:Npn \__gtl_if_head_eq_meaning_return:NN #1#2 + { + \exp_after:wN \__gtl_head:wnnnnn #1 + { \if_false: } + { \if_meaning:w #2 \c_group_begin_token } + { \if_meaning:w #2 \c_group_end_token } + { \if_meaning:w #2 \c_space_token } + { \if_meaning:w #2 } + \prg_return_true: + \else: + \prg_return_false: + \fi: + } +\cs_new:Npn \__gtl_head:wnnnnn \s__gtl #1#2#3 \s__stop #4#5#6#7#8 + { + \tl_if_empty:nTF {#1} + { + \tl_if_empty:nTF {#2} + { \tl_if_empty:nTF {#3} {#4} {#5} } + { \__gtl_head_aux:nwnnnn {#2} \q_stop {#5} {#6} {#7} {#8} } + } + { \__gtl_head_aux:nwnnnn #1 \q_stop {#5} {#6} {#7} {#8} } + } +\cs_new:Npn \__gtl_head_aux:nwnnnn #1#2 \q_stop #3#4#5#6 + { + \tl_if_head_is_group:nTF {#1} {#3} + { + \tl_if_empty:nTF {#1} {#4} + { + \tl_if_head_is_space:nTF {#1} {#5} + { \if_false: { \fi: \__gtl_head_auxii:N #1 } {#6} } + } + } + } +\cs_new:Npn \__gtl_head_auxii:N #1 + { + \exp_after:wN \__gtl_head_auxiii:Nnn + \exp_after:wN #1 + \exp_after:wN { \if_false: } \fi: + } +\cs_new:Npn \__gtl_head_auxiii:Nnn #1#2#3 { #3 #1 } +\cs_new:Npn \gtl_head:N #1 + { + \exp_after:wN \__gtl_head:wnnnnn #1 + { } + { \exp_after:wN { \if_false: } \fi: } + { \if_false: { \fi: } } + { ~ } + { \__gtl_exp_not_n:N } + } +\cs_new:Npn \gtl_head_do:NN #1#2 + { + \exp_after:wN \__gtl_head:wnnnnn #1 + { #2 \q_no_value } + { \exp_after:wN #2 \exp_after:wN { \if_false: } \fi: } + { \if_false: { \fi: #2 } } + { #2 ~ } + { #2 } + } +\cs_new_protected:Npn \gtl_get_left:NN #1#2 + { + \exp_after:wN \__gtl_head:wnnnnn #1 + { \gtl_set:Nn #2 { \q_no_value } } + { \gtl_set_eq:NN #2 \c_group_begin_gtl } + { \gtl_set_eq:NN #2 \c_group_end_gtl } + { \gtl_set:Nn #2 { ~ } } + { \gtl_set:Nn #2 } + } +\cs_new_protected:Npn \gtl_pop_left:N #1 + { \tl_set:Nx #1 { \exp_after:wN \__gtl_pop_left:w #1 } } +\cs_new_protected:Npn \gtl_gpop_left:N #1 + { \tl_gset:Nx #1 { \exp_after:wN \__gtl_pop_left:w #1 } } +\cs_new:Npn \__gtl_pop_left:w \s__gtl #1#2#3 \s__stop + { + \tl_if_empty:nTF {#1} + { + \tl_if_empty:nTF {#2} + { \__gtl_pop_left_auxi:n {#3} } + { \__gtl_pop_left_auxiv:nn {#2} {#3} } + } + { \__gtl_pop_left_auxv:nnn {#1} {#2} {#3} } + } +\cs_new:Npn \__gtl_pop_left_auxi:n #1 + { + \s__gtl + { } + \__gtl_pop_left_auxii:nnnw { } { } #1 \q_nil \q_stop + \s__stop + } +\cs_new:Npn \__gtl_pop_left_auxii:nnnw #1#2#3 + { + \quark_if_nil:nTF {#3} + { \__gtl_pop_left_auxiii:nnnw {#1} {#2} {#3} } + { \__gtl_pop_left_auxii:nnnw { #1 #2 } { {#3} } } + } +\cs_new:Npn \__gtl_pop_left_auxiii:nnnw #1#2#3#4 \q_stop + { + \tl_if_empty:nTF {#4} + { \exp_not:n { #2 {#1} } } + { \__gtl_pop_left_auxii:nnnw { #1 #2 } { {#3} } } + } +\cs_new:Npn \__gtl_pop_left_auxiv:nn #1#2 + { + \s__gtl + { \tl_if_head_is_group:nT {#1} { { \tl_head:n {#1} } } } + { \tl_if_head_is_space:nTF {#1} { \exp_not:f } { \tl_tail:n } {#1} } + { \exp_not:n {#2} } + \s__stop + } +\cs_new:Npn \__gtl_pop_left_auxv:nnn #1#2#3 + { + \s__gtl + { \if_false: { \fi: \__gtl_pop_left_auxvi:n #1 } } + { \exp_not:n {#2} } + { \exp_not:n {#3} } + \s__stop + } +\cs_new:Npn \__gtl_pop_left_auxvi:n #1 + { + \tl_if_empty:nF {#1} + { + \tl_if_head_is_group:nT {#1} { { \tl_head:n {#1} } } + { + \tl_if_head_is_space:nTF {#1} + { \exp_not:f } { \tl_tail:n } {#1} + } + } + \exp_after:wN \exp_not:n \exp_after:wN { \if_false: } \fi: + } +\cs_new_protected:Npn \gtl_pop_left:NN #1#2 + { + \gtl_get_left:NN #1 #2 + \gtl_pop_left:N #1 + } +\cs_new_protected:Npn \gtl_gpop_left:NN #1#2 + { + \gtl_get_left:NN #1 #2 + \gtl_gpop_left:N #1 + } +\cs_new:Npn \gtl_left_tl:N #1 + { \exp_after:wN \__gtl_left_tl:w #1 } +\cs_new:Npn \__gtl_left_tl:w \s__gtl #1#2#3 \s__stop + { \tl_if_empty:nTF {#1} { \exp_not:n {#2} } { \tl_head:n {#1} } } +\cs_new_protected:Npn \gtl_pop_left_tl:N #1 + { \tl_set:Nx #1 { \exp_after:wN \__gtl_pop_left_tl:w #1 } } +\cs_new_protected:Npn \gtl_gpop_left_tl:N #1 + { \tl_gset:Nx #1 { \exp_after:wN \__gtl_pop_left_tl:w #1 } } +\cs_new:Npn \__gtl_pop_left_tl:w \s__gtl #1#2#3 \s__stop + { + \s__gtl + \tl_if_empty:nTF {#1} + { { } { } } + { + { { } \tl_tail:n {#1} } + { \exp_not:n {#2} } + } + { \exp_not:n {#3} } + \s__stop + } +\cs_new:Npn \gtl_left_item:NF #1 + { \exp_after:wN \__gtl_left_item:wF #1 } +\cs_new:Npn \__gtl_left_item:wF \s__gtl #1#2#3 \s__stop + { \__gtl_left_item_auxi:nwF #1 {#2} \q_stop } +\cs_new:Npn \__gtl_left_item_auxi:nwF #1#2 \q_stop #3 + { \tl_if_blank:nTF {#1} {#3} { \tl_head:n {#1} } } +\prg_new_protected_conditional:Npnn \gtl_pop_left_item:NN #1#2 { TF , T , F } + { \exp_after:wN \__gtl_pop_left_item:wNNN #1#2 \tl_set:Nx #1 } +\prg_new_protected_conditional:Npnn \gtl_gpop_left_item:NN #1#2 { TF , T , F } + { \exp_after:wN \__gtl_pop_left_item:wNNN #1#2 \tl_gset:Nx #1 } +\cs_new_protected:Npn \__gtl_pop_left_item:wNNN + \s__gtl #1#2#3 \s__stop #4#5#6 + { + \tl_if_empty:nTF {#1} + { + \tl_if_blank:nTF {#2} { \prg_return_false: } + { + \tl_set:Nx #4 { \tl_head:n {#2} } + #5 #6 + { + \s__gtl { } { \tl_tail:n {#2} } + { \exp_not:n {#3} } \s__stop + } + \prg_return_true: + } + } + { + \__gtl_pop_left_item_aux:nwnnNNN #1 \q_nil \q_stop + {#2} {#3} #4 #5 #6 + } + } +\cs_new_protected:Npn \__gtl_pop_left_item_aux:nwnnNNN + #1#2 \q_stop #3#4#5#6#7 + { + \tl_if_blank:nTF {#1} { \prg_return_false: } + { + \tl_set:Nx #5 { \tl_head:n {#1} } + #6 #7 + { + \s__gtl + { { \tl_tail:n {#1} } \__gtl_strip_nil_mark:w #2 \q_mark } + { \exp_not:n {#3} } + { \exp_not:n {#4} } + \s__stop + } + \prg_return_true: + } + } +\cs_new:Npn \gtl_left_text:NF #1 + { \exp_after:wN \__gtl_left_text:wF #1 } +\cs_new:Npn \__gtl_left_text:wF \s__gtl #1#2#3 \s__stop + { + \tl_if_empty:nTF {#1} + { \__gtl_left_text_auxi:nwF {#2} \q_stop } + { \__gtl_left_text_auxi:nwF #1 \q_stop } + } +\cs_new:Npn \__gtl_left_text_auxi:nwF #1#2 \q_stop + { \__gtl_left_text_auxii:wnwF #1 \q_mark { } \q_mark \q_stop } +\cs_new:Npn \__gtl_left_text_auxii:wnwF #1 # + { \__gtl_left_text_auxiii:nnwF {#1} } +\cs_new:Npn \__gtl_left_text_auxiii:nnwF #1#2 #3 \q_mark #4 \q_stop #5 + { \tl_if_empty:nTF {#4} {#5} { \exp_not:n { #1 {#2} } } } +\cs_new_protected:Npn \gtl_pop_left_text:N #1 + { \tl_set:Nx #1 { \exp_after:wN \__gtl_pop_left_text:w #1 } } +\cs_new_protected:Npn \gtl_gpop_left_text:N #1 + { \tl_gset:Nx #1 { \exp_after:wN \__gtl_pop_left_text:w #1 } } +\cs_new:Npn \__gtl_pop_left_text:w \s__gtl #1#2#3 \s__stop + { + \s__gtl + \tl_if_empty:nTF {#1} + { + { } + { \__gtl_pop_left_text_auxi:n {#2} } + } + { + { \__gtl_pop_left_text_auxiv:nw #1 \q_nil \q_mark } + { \exp_not:n {#2} } + } + { \exp_not:n {#3} } + \s__stop + } +\cs_new:Npn \__gtl_pop_left_text_auxi:n #1 + { + \__gtl_pop_left_text_auxii:wnw #1 + \q_nil \q_mark { } \q_mark \q_stop + } +\cs_new:Npn \__gtl_pop_left_text_auxii:wnw #1 # + { \__gtl_pop_left_text_auxiii:nnw {#1} } +\cs_new:Npn \__gtl_pop_left_text_auxiii:nnw #1#2#3 \q_mark #4 \q_stop + { + \tl_if_empty:nTF {#4} + { \__gtl_strip_nil_mark:w #1 } + { \__gtl_strip_nil_mark:w #3 \q_mark } + } +\cs_new:Npn \__gtl_pop_left_text_auxiv:nw #1 + { + { \__gtl_pop_left_text_auxi:n {#1} } + \__gtl_strip_nil_mark:w + } +\cs_new:Npn \__gtl_tl_count:n #1 + { \int_eval:n { \c_zero \__gtl_tl_count_loop:n #1 \q_nil \q_stop } } +\cs_new:Npn \__gtl_tl_count_loop:n #1 + { + \quark_if_nil:nTF {#1} + { \__gtl_tl_count_test:w } + { + \c_one \__gtl_tl_count_loop:n } + } +\cs_new:Npn \__gtl_tl_count_test:w #1 \q_stop + { \tl_if_empty:nF {#1} { + \c_one \__gtl_tl_count_loop:n #1 \q_stop } } +\cs_new:Npn \gtl_extra_end:N #1 + { \exp_after:wN \__gtl_extra_end:w #1 } +\cs_new:Npn \__gtl_extra_end:w \s__gtl #1#2#3 \s__stop + { \__gtl_tl_count:n {#1} } +\cs_new:Npn \gtl_extra_begin:N #1 + { \exp_after:wN \__gtl_extra_begin:w #1 } +\cs_new:Npn \__gtl_extra_begin:w \s__gtl #1#2#3 \s__stop + { \__gtl_tl_count:n {#3} } +\cs_new:Npn \gtl_count_tokens:N #1 + { \exp_after:wN \__gtl_count_tokens:w #1 } +\cs_new:Npn \__gtl_count_tokens:w \s__gtl #1#2#3 \s__stop + { + \int_eval:n + { \c_minus_one \__gtl_count_auxi:nw #1 {#2} #3 \q_nil \q_stop } + } +\cs_new:Npn \__gtl_count_auxi:nw #1 + { + \quark_if_nil:nTF {#1} + { \__gtl_count_auxii:w } + { + + \c_one + \__gtl_count_auxiii:n {#1} + \__gtl_count_auxi:nw + } + } +\cs_new:Npn \__gtl_count_auxii:w #1 \q_stop + { + \tl_if_empty:nF {#1} + { + + \c_two + \__gtl_count_auxi:nw #1 \q_stop + } + } +\cs_new:Npn \__gtl_count_auxiii:n #1 + { + \tl_if_empty:nF {#1} + { + \tl_if_head_is_group:nTF {#1} + { + + \c_two + \exp_args:No \__gtl_count_auxiii:n { \use:n #1 } + } + { + + \c_one + \tl_if_head_is_N_type:nTF {#1} + { \exp_args:No \__gtl_count_auxiii:n { \use_none:n #1 } } + { \exp_args:Nf \__gtl_count_auxiii:n {#1} } + } + } + } +%% +%% +%% End of file `gtl.sty'. |