%%
%% This is file `xpeek.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% xpeek.dtx  (with options: `package')
%% ----------------------------------------------------------------
%% 
%% xpeek: Define commands that peek ahead in the input stream
%% 
%% Copyright © 2012 by Joel C. Salomon.
%% 
%% This work consists of the file  xpeek.dtx,
%%           and the derived files xpeek.ins,
%%                                 xpeek.pdf, &
%%                                 xpeek.sty.
%% 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 at ‹http://www.latex-project.org/lppl.txt›.
%% 
%% This work is “maintained” (per LPPL maintenance status) by
%% Joel C. Salomon ‹joelcsalomon@gmail.com›.
%% 
%% ----------------------------------------------------------------
\RequirePackage{expl3, xparse}
\ProvidesExplPackage
  {xpeek} {2012/08/15} {0.2}
  {Define commands that peek ahead in the input stream}
\tl_new:N \g_xpeek_matchlist_tl
\tl_new:N \g_xpeek_ignorelist_tl
\tl_new:N \l__xpeek_code_tl
\cs_new_protected:Npn \xpeek_after:nw #1
  {
    \tl_set:Nn \l__xpeek_code_tl {#1}
    \peek_after:Nw \l__xpeek_code_tl
  }
\tl_new:N \l__xpeek_collected_tokens_tl
\cs_new_protected:Npn \xpeek_collect_do:nn #1#2
  {
    \tl_clear:N \l__xpeek_collected_tokens_tl
    \__xpeek_collect_do:nnn {#1} {#2} {}
  }
\cs_new_protected:Npn \__xpeek_collect_do:nnn #1#2#3
  {
    \xpeek_after:nw
      {
        \xpeek_if_in:NNTF #1 \l_peek_token
          {
            \tl_put_right:Nn \l__xpeek_collected_tokens_tl {#3}
            \__xpeek_collect_do:nnn {#1} {#2}
          }
          {
            #2 { \l__xpeek_collected_tokens_tl #3 }
          }
      }
  }
\bool_new:N \l__xpeek_bool
\prg_new_protected_conditional:Npnn \xpeek_if_in:NN #1#2 { TF }
  {
    \bool_set_false:N \l__xpeek_bool
    \tl_map_inline:Nn #1
      {
        \token_if_eq_charcode:NNT #2 ##1
          {
            \bool_set_true:N \l__xpeek_bool
            \tl_map_break:
          }
      }
    \bool_if:NTF \l__xpeek_bool
      { \prg_return_true: } { \prg_return_false: }
  }
%% 
%%
%% End of file `xpeek.sty'.
