☰

嵌套序列映射的正确 # 数是多少？

tag-icon • tag-icon expl3 nesting comma-separated-list
嵌套序列映射的正确 # 数是多少？

我尝试嵌套两个序列映射，到目前为止，这种方法是可行的，但我想在命令定义中使用它们，这样应该<items>可以作为和访问##1，###1但这种方法行不通。是否可以在此级别使用嵌套映射？

\documentclass{article}

\usepackage{xparse}

\ExplSyntaxOn
\makeatletter

% some variants
\cs_generate_variant:Nn \seq_set_split:Nnn { Nnf , NnV , Nnx }

% sequence to store the higlight key value pair
\seq_new:N \l_@@_highlight_seq
% sequence to store the numbers inside the key
\seq_new:N \l_@@_highlight_pos_seq


\cs_new_protected:Npn \@@_evaluate_higlights:n #1
 {
  % map the whole argument as clist
  \clist_map_inline:nn { #1 }
   {
    % split a clist item at the equal sign
    \seq_set_split:Nnn \l_@@_highlight_seq { = } { ##1 }
    % split the first part of the higlight sequence at plus signs
    \seq_set_split:Nnf \l_@@_highlight_pos_seq { + }
     {
      \seq_item:Nn \l_@@_highlight_seq { 1 }
     }
    \par\bigskip
    % map the key numbers to their values
    \seq_map_inline:Nn \l_@@_highlight_pos_seq
     {
      % for this example just some text output
      number~###1
      {}~has~value~
      \seq_item:Nn \l_@@_highlight_seq { 2 }\par
     }
   }
 }

\NewDocumentCommand { \highlights } { m }
 {
  \@@_evaluate_higlights:n { #1 }
 }

\ExplSyntaxOff

\begin{document}
\textbf{Highlights}
\highlights{1=a, 2+3=b}

\bigskip
\textbf{Desired output}
\par\bigskip
number 1 has value a\par

\par\bigskip
number 2 has value b\par
number 3 has value b\par
\end{document}

强调

答案1

我自己明白了。参数的嵌套顺序是#1，，##1等等####1。

\documentclass{article}

\usepackage{xparse}

\ExplSyntaxOn
\makeatletter

% some variants
\cs_generate_variant:Nn \seq_set_split:Nnn { Nnf , NnV , Nnx }

% sequence to store the higlight key value pair
\seq_new:N \l_@@_highlight_seq
% sequence to store the numbers inside the key
\seq_new:N \l_@@_highlight_pos_seq


\cs_new_protected:Npn \@@_evaluate_higlights:n #1
 {
  % map the whole argument as clist
  \clist_map_inline:nn { #1 }
   {
    % split a clist item at the equal sign
    \seq_set_split:Nnn \l_@@_highlight_seq { = } { ##1 }
    % split the first part of the higlight sequence at plus signs
    \seq_set_split:Nnf \l_@@_highlight_pos_seq { + }
     {
      \seq_item:Nn \l_@@_highlight_seq { 1 }
     }
    \par\bigskip
    % map the key numbers to their values
    \seq_map_inline:Nn \l_@@_highlight_pos_seq
     {
      % for this example just some text output
      number~####1
      {}~has~value~
      \seq_item:Nn \l_@@_highlight_seq { 2 }\par
     }
   }
 }

\NewDocumentCommand { \highlights } { m }
 {
  \@@_evaluate_higlights:n { #1 }
 }

\ExplSyntaxOff

\begin{document}
\textbf{Highlights}
\highlights{1=a, 2+3=b}

\bigskip
\textbf{Desired output}
\par\bigskip
number 1 has value a\par

\par\bigskip
number 2 has value b\par
number 3 has value b\par
\end{document}

相关内容