%%
%% This is file `mathcolor.ltx',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% mathcolor.dtx  (with options: `code')
%% 
%% The source is maintained by the LaTeX Project team and bug
%% reports for it can be opened at https://latex-project.org/bugs/
%% (but please observe conditions on bug reports sent to that address!)
%% 
%% 
%% File: mathcolor.dtx (C) Copyright 2021-2022
%%% From File: mathcolor.dtx
\def\mathcolorversion{v1.0b}
\def\mathcolordate{2022/01/28}


\ifcsname mathcolor\endcsname \endinput \fi
\ExplSyntaxOn
\seq_new:N \g__mathcolor_seq
\DeclareDocumentCommand \mathcolor { o m m } {
  \mode_if_math:F { \non@alpherr {\mathcolor\space} }
  \seq_gpush:No \g__mathcolor_seq \current@color
  \group_insert_after:N \use_none:n
  \IfValueTF{#1} { \color[#1]{#2} }{ \color{#2} }
  #3
  \__mathcolor_scan_for_scripts:w
}
\cs_new_protected:Npn \__mathcolor_scan_for_scripts:w {
  \__mathcolor_peek_catcode_ignore_filler_expand:NTF \c_math_subscript_token
    { \__mathcolor_handle_scripts:Nw }
    { \token_if_math_superscript:NTF \l_peek_token
      { \__mathcolor_handle_scripts:Nw }
      { \token_case_meaning:NnTF \l_peek_token
          {
            \limits   { \limits }
            \nolimits { \nolimits }
            \displaylimits { \displaylimits }
          }
          { \__mathcolor_scan_for_scripts:w \use_none:n }
          { \peek_meaning_remove:NTF '
            { \__mathcolor_handle_scripts:Nw ^\c_group_begin_token \prim@s }
            { \reset@color
              \seq_gpop:NN \g__mathcolor_seq \current@color
            }
          }
      }
    }
}

\cs_new_protected:Npn \__mathcolor_handle_scripts:Nw #1 {
    #1 \c_group_begin_token \c_group_begin_token
    \seq_get:NN \g__mathcolor_seq \current@color
    \set@color
    \group_insert_after:N \c_group_end_token
    \group_insert_after:N \__mathcolor_scan_for_scripts:w
    \__mathcolor_peek_catcode_ignore_filler_expand:NTF \c_group_begin_token
      { \peek_catcode_remove:NT \c_group_begin_token { } }
      { \__mathcolor_handle_unbraced_script:N }
  }%    \end{macrocode}

\cs_new_protected:Npn \__mathcolor_handle_unbraced_script:N #1 {
  #1 \c_group_end_token }
\tl_new:N \l__mathcolor_peek_tmp_tl
\cs_new_protected:Npn \__mathcolor_peek_catcode_ignore_filler_expand:NTF #1#2#3
  {
    \tl_set:Nn \l__mathcolor_peek_tmp_tl
      { \token_if_eq_catcode:NNTF \l_peek_token #1 {#2} {#3} }
    \__mathcolor_peek_expand:w
  }
\cs_new_protected:Npn \__mathcolor_peek_expand:w
  {
    \exp_after:wN \peek_catcode_remove:NTF
    \exp_after:wN \c_space_token
    \exp_after:wN \__mathcolor_peek_test_expand:w
    \exp_after:wN \__mathcolor_peek_test_relax:w
    \exp:w \exp_end_continue_f:w
  }
\cs_new_protected:Npn \__mathcolor_peek_test_expand:w
  {
    \token_if_expandable:NTF \l_peek_token
      { \__mathcolor_peek_expand:w }
      { \l__mathcolor_peek_tmp_tl      }
  }
\cs_new_protected:Npn \__mathcolor_peek_test_relax:w
   {
    \peek_meaning_remove:NTF \scan_stop:
      { \__mathcolor_peek_expand:w }
      { \__mathcolor_peek_test_expand:w   }
   }
\ExplSyntaxOff

%%%%%%%%%%%%%%%%
\endinput
%%
%% End of file `mathcolor.ltx'.
