%%
%% This is file `xparse.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% xparse.dtx  (with options: `package')
%% 
%% EXPERIMENTAL CODE
%% 
%% Do not distribute this file without also distributing the
%% source files specified above.
%% 
%% Do not distribute a modified version of this file.
%% 
%% File: xparse.dtx (C) Copyright 1999 Frank Mittelbach, Chris Rowley,
%%                      David Carlisle
%%                  (C) Copyright 2004-2008 Frank Mittelbach,
%%                      The LaTeX3 Project
%%                  (C) Copyright 2009-2011 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 "l3packages 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.
%%
%% -----------------------------------------------------------------------
%%
%% The development version of the bundle can be found at
%%
%%    http://www.latex-project.org/svnroot/experimental/trunk/
%%
%% for those people who are interested.
%%
%%%%%%%%%%%
%% NOTE: %%
%%%%%%%%%%%
%%
%%   Snapshots taken from the repository represent work in progress and may
%%   not work or may contain conflicting material!  We therefore ask
%%   people _not_ to put them into distributions, archives, etc. without
%%   prior consultation with the LaTeX Project Team.
%%
%% -----------------------------------------------------------------------
%%
\RequirePackage{expl3}
\GetIdInfo$Id: xparse.dtx 3036 2011-12-07 19:29:18Z joseph $
  {L3 Experimental document command parser}
\ProvidesExplPackage
  {\ExplFileName}{\ExplFileDate}{\ExplFileVersion}{\ExplFileDescription}
\RequirePackage{expl3}
\@ifpackagelater { expl3 } { 2011/12/07 }
  { }
  {
    \PackageError { xparse } { Support~package~l3kernel~too~old. }
      {
        Please~install~an~up~to~date~version~of~l3kernel~
        using~your~TeX~package~manager~or~from~CTAN.\\ \\
        Loading~xparse~will~abort!
      }
    \tex_endinput:D
  }
\prop_new:N \c_xparse_shorthands_prop
\prop_put:Nnn \c_xparse_shorthands_prop { o } { d[] }
\prop_put:Nnn \c_xparse_shorthands_prop { O } { D[] }
\prop_put:Nnn \c_xparse_shorthands_prop { s } { t* }
\tl_new:N \l_xparse_arg_tl
\tl_new:N \l_xparse_args_tl
\bool_new:N \l_xparse_environment_bool
\bool_new:N \l_xparse_error_bool
\tl_new:N \l_xparse_function_tl
\tl_new:N \l_xparse_last_arg_tl
\bool_new:N \l_xparse_long_bool
\int_new:N \l_xparse_m_args_int
\bool_new:N \l_xparse_m_only_bool
\int_new:N \l_xparse_mandatory_args_int
\bool_new:N \l_xparse_processor_bool
\int_new:N \l_xparse_processor_int
\tl_new:N \l_xparse_signature_tl
\tl_new:N \l_xparse_tmp_tl
\int_new:N \l_xparse_total_args_int
\cs_new_protected_nopar:Npn \xparse_add_grabber_mandatory:N #1
  {
    \tl_put_right:Nx \l_xparse_signature_tl
      {
        \exp_not:c
          { xparse_grab_ #1 \bool_if:NT \l_xparse_long_bool { _long } :w }
      }
    \bool_set_false:N \l_xparse_long_bool
    \int_decr:N \l_xparse_mandatory_args_int
  }
\cs_new_protected_nopar:Npn \xparse_add_grabber_optional:N #1
  {
    \tl_put_right:Nx \l_xparse_signature_tl
      {
        \exp_not:c
          {
            xparse_grab_ #1
            \bool_if:NT \l_xparse_long_bool { _long }
            \int_compare:nNnF \l_xparse_mandatory_args_int > \c_zero
              { _trailing }
            :w
          }
      }
    \bool_set_false:N \l_xparse_long_bool
  }
\cs_new_protected_nopar:cpn { xparse_add_type_+:w }
  {
    \xparse_flush_m_args:
    \bool_set_true:N \l_xparse_long_bool
    \bool_set_false:N \l_xparse_m_only_bool
    \int_decr:N \l_xparse_total_args_int
    \xparse_prepare_signature:N
  }
\cs_new_protected:cpn { xparse_add_type_>:w } #1
  {
    \bool_set_true:N \l_xparse_processor_bool
    \xparse_flush_m_args:
    \int_decr:N \l_xparse_total_args_int
    \tl_put_right:Nn \l_xparse_signature_tl { \xparse_process_arg:n {#1} }
    \xparse_prepare_signature_aux:N
  }
\cs_new_protected:Npn \xparse_add_type_d:w #1#2
  { \xparse_add_type_D:w #1 #2 { \NoValue } }
\cs_new_protected:Npn \xparse_add_type_D:w #1#2#3
  {
    \xparse_flush_m_args:
    \xparse_add_grabber_optional:N D
    \tl_put_right:Nn \l_xparse_signature_tl { #1 #2 {#3} }
    \xparse_prepare_signature:N
  }
\cs_new_protected_nopar:Npn \xparse_add_type_g:w
  { \xparse_add_type_G:w { \NoValue } }
\cs_new_protected:Npn \xparse_add_type_G:w #1
  {
    \xparse_flush_m_args:
    \xparse_add_grabber_optional:N G
    \tl_put_right:Nn \l_xparse_signature_tl { {#1} }
    \xparse_prepare_signature:N
  }
\cs_new_protected_nopar:Npn \xparse_add_type_l:w
  {
    \xparse_flush_m_args:
    \xparse_add_grabber_mandatory:N l
    \xparse_prepare_signature:N
  }
\cs_new_protected_nopar:Npn \xparse_add_type_m:w
  {
    \bool_if:nTF { \l_xparse_long_bool || \l_xparse_processor_bool }
      {
        \xparse_flush_m_args:
        \xparse_add_grabber_mandatory:N m
      }
      { \int_incr:N \l_xparse_m_args_int }
    \xparse_prepare_signature:N
  }
\cs_new_protected:Npn \xparse_add_type_t:w #1
  {
    \xparse_flush_m_args:
    \xparse_add_grabber_optional:N t
    \tl_put_right:Nn \l_xparse_signature_tl { #1 }
    \xparse_prepare_signature:N
  }
\cs_new_protected:Npn \xparse_add_type_u:w #1
  {
    \xparse_flush_m_args:
    \xparse_add_grabber_mandatory:N u
    \tl_put_right:Nn \l_xparse_signature_tl { {#1} }
    \xparse_prepare_signature:N
  }
\cs_new_protected_nopar:Npn \xparse_add_type_v:w
  {
    \xparse_flush_m_args:
    \xparse_add_grabber_mandatory:N v
    \xparse_prepare_signature:N
  }
\cs_new_protected_nopar:Npn \xparse_check_and_add:N #1
  {
    \cs_if_free:cTF { xparse_add_type_ #1 :w }
      {
        \msg_error:nnx { xparse } { unknown-argument-type }
          { \tl_to_str:n {#1} }
        \xparse_add_type_m:w
      }
      { \use:c { xparse_add_type_ #1 :w } }
  }
\cs_new_protected:Npn \xparse_count_mandatory:n #1
  {
    \int_zero:N \l_xparse_mandatory_args_int
    \xparse_count_mandatory:N #1 \q_nil
  }
\cs_new_protected:Npn \xparse_count_mandatory:N #1
  {
    \quark_if_nil:NF #1
      {
        \prop_get:NnNTF \c_xparse_shorthands_prop {#1} \l_xparse_tmp_tl
          { \exp_last_unbraced:NV \xparse_count_mandatory:N \l_xparse_tmp_tl }
          { \xparse_count_mandatory_aux:N #1 }
      }
  }
\cs_new_protected:Npn \xparse_count_mandatory_aux:N #1
  {
    \cs_if_free:cTF { xparse_count_type_ #1 :w }
      { \xparse_count_type_m:w }
      { \use:c { xparse_count_type_ #1 :w } }
  }
\cs_new_protected:cpn { xparse_count_type_>:w } #1
  { \xparse_count_mandatory:N }
\cs_new_protected_nopar:cpn { xparse_count_type_+:w }
  { \xparse_count_mandatory:N }
\cs_new_protected:Npn \xparse_count_type_d:w #1#2
  { \xparse_count_mandatory:N }
\cs_new_protected:Npn \xparse_count_type_D:w #1#2#3
  { \xparse_count_mandatory:N }
\cs_new_protected_nopar:Npn \xparse_count_type_g:w
  { \xparse_count_mandatory:N }
\cs_new_protected:Npn \xparse_count_type_G:w #1
  { \xparse_count_mandatory:N }
\cs_new_protected_nopar:Npn \xparse_count_type_l:w
  {
    \int_incr:N \l_xparse_mandatory_args_int
    \xparse_count_mandatory:N
  }
\cs_new_protected_nopar:Npn \xparse_count_type_m:w
  {
    \int_incr:N \l_xparse_mandatory_args_int
    \xparse_count_mandatory:N
  }
\cs_new_protected:Npn \xparse_count_type_t:w #1
  { \xparse_count_mandatory:N }
\cs_new_protected:Npn \xparse_count_type_u:w #1
  {
    \int_incr:N \l_xparse_mandatory_args_int
    \xparse_count_mandatory:N
  }
\cs_new_protected_nopar:Npn \xparse_count_type_v:w
  {
    \int_incr:N \l_xparse_mandatory_args_int
    \xparse_count_mandatory:N
  }
\cs_new_protected:Npn \xparse_declare_cmd:Nnn #1#2
  {
    \cs_if_exist:NTF #1
      {
        \msg_warning:nnxx { xparse } { redefine-command }
          { \token_to_str:N #1 } { \tl_to_str:n {#2} }
      }
      {
        \msg_info:nnxx { xparse } { define-command }
          { \token_to_str:N #1 } { \tl_to_str:n {#2} }
      }
    \xparse_declare_cmd_aux:Nnn #1 {#2}
  }
\cs_new_protected:Npn \xparse_declare_cmd_aux:Nnn #1#2#3
  {
    \tl_clear_new:c { l_xparse_ \token_to_str:N #1 _arg_spec_tl }
    \tl_set:cn { l_xparse_ \token_to_str:N #1 _arg_spec_tl } {#2}
    \xparse_count_mandatory:n {#2}
    \xparse_prepare_signature:n {#2}
    \bool_if:NTF \l_xparse_m_only_bool
      { \xparse_declare_cmd_all_m:Nn #1 {#3} }
      { \xparse_declare_cmd_mixed:Nn #1 {#3} }
  }
\cs_generate_variant:Nn \xparse_declare_cmd_aux:Nnn { cnn }
\cs_new_protected:Npn \xparse_declare_cmd_all_m:Nn #1#2
  {
    \cs_generate_from_arg_count:NNnn
      #1 \cs_set_protected_nopar:Npn \l_xparse_total_args_int {#2}
  }
\cs_new_protected:Npn \xparse_declare_cmd_mixed:Nn #1#2
  {
    \group_begin:
      \tex_escapechar:D 92 \scan_stop:
      \tl_set:Nx \l_xparse_function_tl { \token_to_str:N #1 }
    \exp_args:NNNo \group_end:
    \tl_set:Nn \l_xparse_function_tl { \l_xparse_function_tl }
    \cs_set_protected_nopar:Npx #1
      {
        \exp_not:n
          {
            \int_zero:N \l_xparse_processor_int
            \tl_set:Nn \l_xparse_args_tl
          }
            { \exp_not:c { \l_xparse_function_tl } }
        \exp_not:o \l_xparse_signature_tl
        \exp_not:N \l_xparse_args_tl
      }
    \cs_generate_from_arg_count:cNnn
      { \token_to_str:N #1 } \cs_set:Npn \l_xparse_total_args_int {#2}
  }
\cs_new_protected:Npn \xparse_declare_cmd_implementation:nNn #1#2#3
  {
    \cs_generate_from_arg_count:cNnn { implementation_ #1 :w }
      \cs_set:Npn {#2} {#3}
  }
\cs_new_protected:Npn \xparse_declare_cmd_interface:Nnn #1#2#3
  {
    \xparse_prepare_signature:n {#3}
    \bool_if:NTF \l_xparse_m_only_bool
      { \xparse_declare_cmd_interface_all_m:Nn #1 {#2} }
      { \xparse_declare_cmd_interface_mixed:Nn #1 {#2} }
    \cs_generate_from_arg_count:cNnn { implementation_ #2 :w }
      \cs_set:Npn \l_xparse_total_args_int  { '#2' }
  }
\cs_new_protected:Npn \xparse_declare_cmd_interface_all_m:Nn #1#2
  {
    \cs_generate_from_arg_count:NNnn
      #1 \cs_set_protected_nopar:Npn \l_xparse_total_args_int
      { \use:c { implementation_ #2 :w } }
  }
\cs_new_protected:Npn \xparse_declare_cmd_interface_mixed:Nn #1#2
  {
    \cs_set_protected_nopar:Npx #1
      {
        \exp_not:n
          {
            \int_zero:N \l_xparse_processor_int
            \tl_set:Nn \l_xparse_args_tl
          }
            { \exp_not:c { \token_to_str:N #1 } }
        \exp_not:o \l_xparse_signature_tl
        \exp_not:N \l_xparse_args_tl
      }
    \cs_generate_from_arg_count:cNnn
      { \token_to_str:N #1 } \cs_set:Npn \l_xparse_total_args_int
      { \use:c { implementation_ #2 :w } }
  }
\cs_new_protected:Npn \xparse_declare_env:nnnn #1#2#3#4
  {
    \bool_set_true:N \l_xparse_environment_bool
    \cs_if_exist:cTF {#1}
      {
        \msg_warning:nnxx { xparse } { redefine-environment }
          { \tl_to_str:n {#1} } { \tl_to_str:n {#2} }
      }
      {
        \msg_info:nnxx { xparse } { define-environment }
          { \tl_to_str:n {#1} } { \tl_to_str:n {#2} }
      }
    \xparse_declare_cmd_aux:cnn { environment_begin_ #1 :w } {#2}
      {
        \group_begin:
          \cs_set_protected_nopar:cpx { environment_end_ #1 :w }
            {
                \exp_not:c { environment_end_ #1 _aux:N }
                \exp_not:o \l_xparse_args_tl
                \exp_not:n
                  {
                    \if@endpe
                      \exp_after:wN \group_end:
                      \cs:w @endpetrue \exp_after:wN \cs_end:
                    \else
                      \exp_after:wN \group_end:
                    \fi
                  }
            }
          #3
      }
   \cs_set_protected_nopar:cpx { environment_end_ #1 : }
     { \exp_not:c { environment_end_ #1 :w } }
    \bool_set_false:N \l_xparse_environment_bool
    \cs_set_nopar:cpx { environment_end_ #1 _aux:N } ##1
      { \exp_not:c { environment_end_ #1 _aux :w } }
    \cs_generate_from_arg_count:cNnn
      { environment_end_ #1 _aux :w } \cs_set:Npn
      \l_xparse_total_args_int {#4}
    \cs_set_eq:cc {#1} { environment_begin_ #1 :w }
    \cs_set_eq:cc { end #1 } { environment_end_ #1 : }
  }
\cs_new_protected_nopar:Npn \xparse_flush_m_args:
  {
    \cs_if_exist:cT { xparse_grab_m_ \int_use:N \l_xparse_m_args_int :w }
      {
        \tl_put_right:Nx \l_xparse_signature_tl
           { \exp_not:c { xparse_grab_m_ \int_use:N \l_xparse_m_args_int :w } }
        \int_set:Nn \l_xparse_mandatory_args_int
          { \l_xparse_mandatory_args_int - \l_xparse_m_args_int }
      }
    \int_zero:N \l_xparse_m_args_int
    \bool_set_false:N \l_xparse_m_only_bool
  }
\prg_new_conditional:Npnn \xparse_if_no_value:n #1 { T ,  F , TF }
  { \str_if_eq:nnTF {#1} { \NoValue } \prg_return_true: \prg_return_false: }
\cs_new_protected:Npn \xparse_prepare_signature:n #1
  {
    \bool_set_false:N \l_xparse_long_bool
    \int_zero:N \l_xparse_m_args_int
    \bool_if:NTF \l_xparse_environment_bool
      { \bool_set_false:N \l_xparse_m_only_bool }
      { \bool_set_true:N \l_xparse_m_only_bool }
    \bool_set_false:N \l_xparse_processor_bool
    \tl_clear:N \l_xparse_signature_tl
    \int_zero:N \l_xparse_total_args_int
    \xparse_prepare_signature:N #1 \q_nil
  }
\cs_new_protected:Npn \xparse_prepare_signature:N #1
  {
    \bool_set_false:N \l_xparse_processor_bool
    \xparse_prepare_signature_aux:N #1
  }
\cs_new_protected:Npn \xparse_prepare_signature_aux:N #1
  {
    \quark_if_nil:NTF #1
      { \bool_if:NF \l_xparse_m_only_bool { \xparse_flush_m_args: } }
      {
        \prop_get:NnNTF \c_xparse_shorthands_prop {#1} \l_xparse_tmp_tl
          { \exp_after:wN \xparse_prepare_signature:N \l_xparse_tmp_tl }
          {
            \int_incr:N \l_xparse_total_args_int
            \xparse_check_and_add:N #1
          }
      }
  }
\cs_new_protected:Npn \xparse_process_arg:n #1
  {
    \int_incr:N \l_xparse_processor_int
    \cs_set:cpn { xparse_processor_ \int_use:N \l_xparse_processor_int :n } ##1
      { #1 {##1} }
  }
\cs_new_protected:Npn \xparse_add_arg:n #1
  {
    \int_compare:nNnTF \l_xparse_processor_int = \c_zero
      { \tl_put_right:Nn \l_xparse_args_tl { {#1} } }
      {
        \xparse_if_no_value:nTF {#1}
          {
            \int_zero:N \l_xparse_processor_int
            \tl_put_right:Nn \l_xparse_args_tl { {#1} }
          }
          { \xparse_add_arg_aux:n {#1} }
      }
  }
\cs_generate_variant:Nn \xparse_add_arg:n { V }
\cs_new_protected:Npn \xparse_add_arg_aux:n #1
  {
    \tl_set_eq:NN \ProcessedArgument \l_xparse_arg_tl
    \use:c { xparse_processor_ \int_use:N \l_xparse_processor_int :n } {#1}
    \int_decr:N \l_xparse_processor_int
    \int_compare:nNnTF \l_xparse_processor_int = \c_zero
      {
        \tl_put_right:Nx \l_xparse_args_tl
          { { \exp_not:V \ProcessedArgument } }
      }
      { \xparse_add_arg_aux:V \ProcessedArgument }
}
\cs_generate_variant:Nn \xparse_add_arg_aux:n { V }
\cs_new_protected:Npn \xparse_grab_arg:w { }
\cs_new_protected:Npn \xparse_grab_arg_aux_i:w { }
\cs_new_protected:Npn \xparse_grab_arg_aux_ii:w { }
\cs_new_protected:Npn \xparse_grab_D:w #1#2#3#4 \l_xparse_args_tl
  {
    \xparse_grab_D_aux:NNnnNn #1 #2 {#3} {#4} \cs_set_protected_nopar:Npn
      { _ignore_spaces }
  }
\cs_new_protected:Npn \xparse_grab_D_long:w #1#2#3#4 \l_xparse_args_tl
  {
    \xparse_grab_D_aux:NNnnNn #1 #2 {#3} {#4} \cs_set_protected:Npn
      { _ignore_spaces }
  }
\cs_new_protected:Npn \xparse_grab_D_trailing:w #1#2#3#4 \l_xparse_args_tl
  { \xparse_grab_D_aux:NNnnNn #1 #2 {#3} {#4} \cs_set_protected_nopar:Npn { } }
\cs_new_protected:Npn \xparse_grab_D_long_trailing:w #1#2#3#4 \l_xparse_args_tl
  { \xparse_grab_D_aux:NNnnNn #1 #2 {#3} {#4} \cs_set_protected:Npn { } }
\cs_new_protected:Npn \xparse_grab_D_aux:NNnnNn #1#2#3#4#5#6
  {
    #5 \xparse_grab_arg:w #1
      {
        \peek_meaning:NTF \c_group_begin_token
          { \xparse_grab_arg_aux_i:w }
          { \xparse_grab_arg_aux_ii:w }
      }
    #5 \xparse_grab_arg_aux_i:w ##1
      {
        \peek_charcode:NTF #2
          { \xparse_grab_arg_aux_ii:w { {##1} } }
          { \xparse_grab_arg_aux_ii:w {##1} }
      }
    #5 \xparse_grab_arg_aux_ii:w ##1 #2
      {
        \tl_if_in:nnTF {##1} {#1}
          { \xparse_grab_D_nested:NNnnN #1 #2 {##1} {#4} #5 }
          {
            \xparse_add_arg:n {##1}
            #4 \l_xparse_args_tl
           }
      }
    \use:c { peek_charcode #6 :NTF } #1
      { \xparse_grab_arg:w }
      {
        \xparse_add_arg:n {#3}
        #4 \l_xparse_args_tl
      }
  }
\tl_new:N \l_xparse_nesting_a_tl
\tl_new:N \l_xparse_nesting_b_tl
\quark_new:N \q_xparse
\cs_new_protected:Npn \xparse_grab_D_nested:NNnnN #1#2#3#4#5
  {
    \tl_clear:N \l_xparse_nesting_a_tl
    \tl_clear:N \l_xparse_nesting_b_tl
    #5 \xparse_grab_arg:w ##1 #1 ##2 \q_xparse ##3 #2
      {
        \tl_put_right:Nn \l_xparse_nesting_a_tl { ##1 #1 }
        \tl_put_right:Nn \l_xparse_nesting_b_tl { #2 ##3 }
        \tl_if_in:nnTF {##2} {#1}
          { \xparse_grab_arg:w ##2 \q_xparse }
          {
            \tl_put_right:Nn \l_xparse_nesting_a_tl {##2}
            \tl_if_in:NnTF \l_xparse_nesting_b_tl {#1}
              {
                \tl_set_eq:NN \l_xparse_tmp_tl \l_xparse_nesting_b_tl
                \tl_clear:N \l_xparse_nesting_b_tl
                \exp_after:wN \xparse_grab_arg:w \l_xparse_tmp_tl \q_xparse
              }
              {
                \tl_put_right:No \l_xparse_nesting_a_tl
                  \l_xparse_nesting_b_tl
                \xparse_add_arg:V \l_xparse_nesting_a_tl
                #4 \l_xparse_args_tl
              }
          }
      }
    \xparse_grab_arg:w #3 \q_xparse
  }
\cs_new_protected:Npn \xparse_grab_G:w #1#2 \l_xparse_args_tl
  {
    \xparse_grab_G_aux:nnNn {#1} {#2} \cs_set_protected_nopar:Npn
      { _ignore_spaces }
  }
\cs_new_protected:Npn \xparse_grab_G_long:w #1#2 \l_xparse_args_tl
  {
    \xparse_grab_G_aux:nnNn {#1} {#2} \cs_set_protected:Npn { _ignore_spaces }
  }
\cs_new_protected:Npn \xparse_grab_G_trailing:w #1#2 \l_xparse_args_tl
  { \xparse_grab_G_aux:nnNn {#1} {#2} \cs_set_protected_nopar:Npn { } }
\cs_new_protected:Npn \xparse_grab_G_long_trailing:w #1#2 \l_xparse_args_tl
  { \xparse_grab_G_aux:nnNn {#1} {#2} \cs_set_protected:Npn { } }
\cs_new_protected:Npn \xparse_grab_G_aux:nnNn #1#2#3#4
  {
    #3 \xparse_grab_arg:w ##1
      {
        \xparse_add_arg:n {##1}
        #2 \l_xparse_args_tl
      }
    \use:c { peek_meaning #4 :NTF } \c_group_begin_token
      { \xparse_grab_arg:w }
      {
        \xparse_add_arg:n {#1}
        #2 \l_xparse_args_tl
      }
  }
\cs_new_protected:Npn \xparse_grab_l:w #1 \l_xparse_args_tl
  { \xparse_grab_l_aux:nN {#1} \cs_set_protected_nopar:Npn }
\cs_new_protected:Npn \xparse_grab_l_long:w #1 \l_xparse_args_tl
  { \xparse_grab_l_aux:nN {#1} \cs_set_protected:Npn }
\cs_new_protected:Npn \xparse_grab_l_aux:nN #1#2
  {
    #2 \xparse_grab_arg:w ##1##
      {
        \xparse_add_arg:n {##1}
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:Npn \xparse_grab_m:w #1 \l_xparse_args_tl
  {
    \cs_set_protected_nopar:Npn \xparse_grab_arg:w ##1
      {
        \xparse_add_arg:n {##1}
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:Npn \xparse_grab_m_long:w #1 \l_xparse_args_tl
  {
    \cs_set_protected:Npn \xparse_grab_arg:w ##1
      {
        \xparse_add_arg:n {##1}
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:cpn { xparse_grab_m_1:w } #1 \l_xparse_args_tl
  {
    \cs_set_protected_nopar:Npn \xparse_grab_arg:w ##1
      {
        \tl_put_right:Nn \l_xparse_args_tl { {##1} }
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:cpn { xparse_grab_m_2:w } #1 \l_xparse_args_tl
  {
    \cs_set_protected_nopar:Npn \xparse_grab_arg:w ##1##2
      {
        \tl_put_right:Nn \l_xparse_args_tl { {##1} {##2} }
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:cpn { xparse_grab_m_3:w } #1 \l_xparse_args_tl
  {
    \cs_set_protected_nopar:Npn \xparse_grab_arg:w ##1##2##3
      {
        \tl_put_right:Nn \l_xparse_args_tl { {##1} {##2} {##3} }
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:cpn { xparse_grab_m_4:w } #1 \l_xparse_args_tl
  {
    \cs_set_protected_nopar:Npn \xparse_grab_arg:w ##1##2##3##4
      {
        \tl_put_right:Nn \l_xparse_args_tl { {##1} {##2} {##3} {##4} }
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:cpn { xparse_grab_m_5:w } #1 \l_xparse_args_tl
  {
    \cs_set_protected_nopar:Npn \xparse_grab_arg:w ##1##2##3##4##5
      {
        \tl_put_right:Nn \l_xparse_args_tl { {##1} {##2} {##3} {##4} {##5} }
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:cpn { xparse_grab_m_6:w } #1 \l_xparse_args_tl
  {
    \cs_set_protected_nopar:Npn \xparse_grab_arg:w ##1##2##3##4##5##6
      {
        \tl_put_right:Nn \l_xparse_args_tl
          { {##1} {##2} {##3} {##4} {##5} {##6} }
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:cpn { xparse_grab_m_7:w } #1 \l_xparse_args_tl
  {
    \cs_set_protected_nopar:Npn \xparse_grab_arg:w ##1##2##3##4##5##6##7
      {
        \tl_put_right:Nn \l_xparse_args_tl
          { {##1} {##2} {##3} {##4} {##5} {##6} {##7} }
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:cpn { xparse_grab_m_8:w } #1 \l_xparse_args_tl
  {
    \cs_set_protected_nopar:Npn \xparse_grab_arg:w ##1##2##3##4##5##6##7##8
      {
        \tl_put_right:Nn \l_xparse_args_tl
          { {##1} {##2} {##3} {##4} {##5} {##6} {##7} {##8} }
        #1 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:Npn \xparse_grab_t:w #1#2 \l_xparse_args_tl
  {
    \xparse_grab_t_aux:NnNn #1 {#2} \cs_set_protected_nopar:Npn
      { _ignore_spaces }
  }
\cs_new_protected:Npn \xparse_grab_t_long:w #1#2 \l_xparse_args_tl
  { \xparse_grab_t_aux:NnNn #1 {#2} \cs_set_protected:Npn { _ignore_spaces } }
\cs_new_protected:Npn \xparse_grab_t_trailing:w #1#2 \l_xparse_args_tl
  { \xparse_grab_t_aux:NnNn #1 {#2} \cs_set_protected_nopar:Npn { } }
\cs_new_protected:Npn \xparse_grab_t_long_trailing:w #1#2 \l_xparse_args_tl
  { \xparse_grab_t_aux:NnNn #1 {#2} \cs_set_protected:Npn { } }
\cs_new_protected:Npn \xparse_grab_t_aux:NnNn #1#2#3#4
  {
    #3 \xparse_grab_arg:w
      {
        \use:c { peek_charcode_remove #4 :NTF } #1
          {
            \xparse_add_arg:n { \BooleanTrue }
            #2 \l_xparse_args_tl
          }
          {
            \xparse_add_arg:n { \BooleanFalse }
            #2 \l_xparse_args_tl
          }
      }
    \xparse_grab_arg:w
  }
\cs_new_protected:Npn \xparse_grab_u:w #1#2 \l_xparse_args_tl
  { \xparse_grab_u_aux:nnN {#1} {#2} \cs_set_protected_nopar:Npn }
\cs_new_protected:Npn \xparse_grab_u_long:w #1#2 \l_xparse_args_tl
  { \xparse_grab_u_aux:nnN {#1} {#2} \cs_set_protected:Npn }
\cs_new_protected:Npn \xparse_grab_u_aux:nnN #1#2#3
  {
    #3 \xparse_grab_arg:w ##1 #1
      {
        \xparse_add_arg:n {##1}
        #2 \l_xparse_args_tl
      }
    \xparse_grab_arg:w
  }
\tl_new:N \l_xparse_v_rest_of_signature_tl
\tl_new:N \l_xparse_v_arg_tl
\cs_new_protected_nopar:Npn \xparse_grab_v:w
  {
    \bool_set_false:N \l_xparse_long_bool
    \xparse_grab_v_aux:w
  }
\cs_new_protected_nopar:Npn \xparse_grab_v_long:w
  {
    \bool_set_true:N \l_xparse_long_bool
    \xparse_grab_v_aux:w
  }
\cs_new_protected:Npn \xparse_grab_v_aux:w #1 \l_xparse_args_tl
  {
    \tl_set:Nn \l_xparse_v_rest_of_signature_tl {#1}
    \group_begin:
      \group_align_safe_begin:
        \tex_escapechar:D = 92 \scan_stop:
        \tl_clear:N \l_xparse_v_arg_tl
        \peek_N_type:TF
          { \xparse_grab_v_aux_test:N }
          {
            \peek_meaning_remove:NTF \c_group_begin_token
              {
                \group_align_safe_end:
                \xparse_grab_v_bgroup:
              }
              { \xparse_grab_v_aux_abort: }
          }
  }
\cs_new_protected_nopar:Npn \xparse_grab_v_group_end:
  {
        \tl_set:Nx \l_xparse_tmp_tl
          {
            \tl_set:Nn \exp_not:N \l_xparse_v_arg_tl
              { \exp_not:o \l_xparse_v_arg_tl }
          }
      \exp_after:wN \group_align_safe_end:
    \exp_after:wN \group_end:
    \l_xparse_tmp_tl
  }
\cs_new_protected:Npn \xparse_grab_v_aux_test:N #1
  {
    \tl_put_right:Nn \l_xparse_v_arg_tl {#1}
    \xparse_grab_v_token_if_char:NTF #1
      {
        \xparse_grab_v_aux_catcodes:
        \xparse_grab_v_aux_loop:N #1
      }
      { \xparse_grab_v_aux_abort: }
  }
\cs_new_protected:Npn \xparse_grab_v_aux_loop:N #1
  {
    \peek_N_type:TF
      { \xparse_grab_v_aux_loop_ii:NN #1 }
      { \xparse_grab_v_aux_abort: }
  }
\cs_new_protected:Npn \xparse_grab_v_aux_loop_ii:NN #1 #2
  {
    \xparse_grab_v_token_if_char:NTF #2
      {
        \token_if_eq_charcode:NNTF #1 #2
          { \xparse_grab_v_aux_loop_end: }
          {
            \tl_put_right:Nn \l_xparse_v_arg_tl { #2 }
            \xparse_grab_v_aux_loop:N #1
          }
      }
      { \xparse_grab_v_aux_abort: #2 }
  }
\cs_new_protected_nopar:Npn \xparse_grab_v_aux_loop_end:
  {
    \xparse_grab_v_group_end:
    \exp_args:Nx \xparse_add_arg:n
      { \exp_args:No \str_tail:n { \l_xparse_v_arg_tl } }
    \l_xparse_v_rest_of_signature_tl \l_xparse_args_tl
  }
\int_new:N \l_xparse_v_nesting_int
\cs_new_protected_nopar:Npn \xparse_grab_v_bgroup:
  {
    \xparse_grab_v_aux_catcodes:
    \int_set_eq:NN \l_xparse_v_nesting_int \c_one
    \tl_set:Nx \l_xparse_v_arg_tl { \iow_char:N \{ }
    \xparse_grab_v_bgroup_loop:
  }
\cs_new_protected:Npn \xparse_grab_v_bgroup_loop:
  {
    \peek_N_type:TF
      { \xparse_grab_v_bgroup_loop_ii:N }
      { \xparse_grab_v_aux_abort: }
  }
\cs_new_protected:Npn \xparse_grab_v_bgroup_loop_ii:N #1
  {
    \xparse_grab_v_token_if_char:NTF #1
      {
        \token_if_eq_charcode:NNTF \c_group_end_token #1
          {
            \int_decr:N \l_xparse_v_nesting_int
            \int_compare:nNnTF \l_xparse_v_nesting_int > \c_zero
              {
                \tl_put_right:Nn \l_xparse_v_arg_tl { #1 }
                \xparse_grab_v_bgroup_loop:
              }
              { \xparse_grab_v_aux_loop_end: }
          }
          {
            \token_if_eq_charcode:NNT \c_group_begin_token #1
              { \int_incr:N \l_xparse_v_nesting_int }
            \tl_put_right:Nn \l_xparse_v_arg_tl { #1 }
            \xparse_grab_v_bgroup_loop:
          }
      }
      { \xparse_grab_v_aux_abort: #1 }
  }
\cs_new_protected_nopar:Npn \xparse_grab_v_aux_catcodes:
  {
    \cs_set_eq:NN \do \char_set_catcode_other:N
    \dospecials
    \tex_endlinechar:D = `\^^M \scan_stop:
    \bool_if:NTF \l_xparse_long_bool
      { \char_set_catcode_other:n { \tex_endlinechar:D } }
      { \char_set_catcode_parameter:n { \tex_endlinechar:D } }
  }
\cs_new_protected_nopar:Npn \xparse_grab_v_aux_abort:
  {
    \xparse_grab_v_group_end:
    \xparse_add_arg:n { \NoValue }
    \exp_after:wN \xparse_grab_v_aux_abort_ii:w \l_xparse_args_tl \q_stop
  }
\cs_new_protected:Npn \xparse_grab_v_aux_abort_ii:w #1 #2 \q_stop
  {
    \group_begin:
    \char_set_lccode:nn { `\# } { \tex_endlinechar:D }
    \tl_to_lowercase:n
      { \group_end: \peek_meaning_remove:NTF ## }
      {
        \msg_error:nnxx { xparse } { verbatim-newline }
          { \cs_to_str:N #1 }
          { \tl_to_str:N \l_xparse_v_arg_tl }
        \l_xparse_v_rest_of_signature_tl \l_xparse_args_tl
      }
      {
        \msg_error:nnxx { xparse } { verbatim-already-tokenized }
          { \cs_to_str:N #1 }
          { \tl_to_str:N \l_xparse_v_arg_tl }
        \l_xparse_v_rest_of_signature_tl \l_xparse_args_tl
      }
  }
\cs_new_protected:Npn \xparse_grab_v_token_if_char:NTF #1
  { \str_if_eq:xxTF { } { \str_tail:n {#1} } }
\cs_new_protected:Npn \xparse_process_to_str:n #1
  { \tl_set:Nx \ProcessedArgument { \tl_to_str:n {#1} } }
\cs_new_protected:Npn \xparse_bool_reverse:N #1
  {
    \bool_if:NTF #1
      { \tl_set:Nn \ProcessedArgument { \c_false_bool } }
      { \tl_set:Nn \ProcessedArgument { \c_true_bool } }
  }
\tl_new:N \l_xparse_split_argument_tl
\group_begin:
  \char_set_catcode_active:N \@
  \cs_new_protected:Npn \xparse_split_argument:nnn #1#2#3
    {
      \tl_set:Nn \l_xparse_split_argument_tl {#3}
      \group_begin:
      \char_set_lccode:nn { `\@ } { `#2}
      \tl_to_lowercase:n
        {
          \group_end:
          \tl_replace_all:Nnn \l_xparse_split_argument_tl { @ } {#2}
        }
      \cs_set_protected:Npn \xparse_split_argument_aux_i:w
        ##1 \q_mark ##2 #2 ##3 \q_stop
        {
          \tl_put_right:Nn \ProcessedArgument { {##2} }
          ##1 \q_mark ##3 \q_stop
        }
      \cs_set_protected:Npn \xparse_split_argument_aux_iii:w
        ##1 #2 ##2 \q_stop
        {
          \IfNoValueF {##1}
            {
              \msg_error:nnxxx { xparse } { split-excess-tokens }
                { \tl_to_str:n {#2} } { \tl_to_str:n {#1} }
                { \tl_to_str:n {#3} }
            }
        }
      \tl_set:Nx \l_xparse_tmp_tl
        {
          \prg_replicate:nn { #1 + 1 }
            { \xparse_split_argument_aux_i:w }
          \xparse_split_argument_aux_ii:w
          \exp_not:N \q_mark
          \exp_not:o \l_xparse_split_argument_tl
          \prg_replicate:nn {#1} { \exp_not:n {#2} \NoValue }
          \exp_not:n { #2 \q_stop }
        }
      \l_xparse_tmp_tl
    }
\group_end:
\cs_new_protected:Npn \xparse_split_argument_aux_i:w { }
\cs_new_protected:Npn \xparse_split_argument_aux_ii:w
  #1 \q_mark #2 \q_stop
  {
    \tl_if_empty:nF {#2}
      { \xparse_split_argument_aux_iii:w #2 \q_stop }
  }
\cs_new_protected:Npn \xparse_split_argument_aux_iii:w { }
\seq_new:N \l_xparse_split_list_seq
\tl_new:N \l_xparse_split_list_tl
\cs_new_protected:Npn \xparse_split_list:nn #1#2
  {
    \bool_if:nTF
      {
          \tl_if_single_p:n {#1} &&
        ! (\token_if_cs_p:N #1 )
      }
      { \xparse_split_list_single:Nn #1 {#2} }
      { \xparse_split_list_multi:nn {#1} {#2} }
    }
\cs_set_protected:Npn \xparse_split_list_multi:nn #1#2
  {
    \seq_set_split:Nnn \l_xparse_split_list_seq {#1} {#2}
    \tl_clear:N \ProcessedArgument
    \seq_map_inline:Nn \l_xparse_split_list_seq
      { \tl_put_right:Nn \ProcessedArgument { {##1} } }
  }
\cs_generate_variant:Nn \xparse_split_list_multi:nn { nV }
\group_begin:
\char_set_catcode_active:N \@
\cs_new_protected:Npn \xparse_split_list_single:Nn #1#2
  {
    \tl_set:Nn \l_xparse_split_list_tl {#2}
    \group_begin:
    \char_set_lccode:nn { `\@ } { `#1 }
    \tl_to_lowercase:n
      {
         \group_end:
        \tl_replace_all:Nnn \l_xparse_split_list_tl { @ } {#1}
      }
     \xparse_split_list_multi:nV {#1}  \l_xparse_split_list_tl
   }
\group_end:
\cs_new_protected:Npn \xparse_trim_spaces:n #1
  { \tl_set:Nx \ProcessedArgument { \tl_trim_spaces:n {#1} } }
\cs_new_protected:Npn \xparse_exp_add_type_d:w #1#2
  { \xparse_exp_add_type_D:w #1 #2 { \NoValue } }
\cs_new_protected:Npn \xparse_exp_add_type_D:w #1#2#3
  {
    \tl_set:Nx \l_xparse_tmp_tl
      {
        \exp_after:wN \token_to_str:N \l_xparse_function_tl
        \int_use:N \l_xparse_total_args_int
      }
    \xparse_exp_set:cpx { \l_xparse_tmp_tl } ##1 \q_xparse ##2
      {
        \exp_not:N \tl_if_head_eq_charcode:nNTF {##2} #1
          {
            \exp_not:c { \l_xparse_tmp_tl aux }
              ##1 \exp_not:N \q_xparse
          }
          {
            \exp_not:c { \l_xparse_tmp_tl aux }
              ##1 \exp_not:N \q_xparse  #3 #2 {##2}
          }
      }
    \xparse_exp_set:cpx { \l_xparse_tmp_tl aux} ##1 \q_xparse ##2 #2
      {
        \exp_not:c
          {
            \exp_after:wN \token_to_str:N \l_xparse_function_tl
            \int_eval:n { \l_xparse_total_args_int + 1 }
          }
            ##1 {##2} \exp_not:N \q_xparse
      }
    \xparse_exp_prepare_function:N
  }
\cs_new_protected_nopar:Npn \xparse_exp_add_type_l:w
  {
    \xparse_exp_set:cpx
      {
        \exp_after:wN \token_to_str:N \l_xparse_function_tl
        \int_use:N \l_xparse_total_args_int
      }
      ##1 \q_xparse ##2##
      {
        \exp_not:c
          {
            \exp_after:wN \token_to_str:N \l_xparse_function_tl
            \int_eval:n { \l_xparse_total_args_int + 1 }
          }
          ##1 {##2} \exp_not:N \q_xparse
      }
    \xparse_exp_prepare_function:N
  }
\cs_new_protected_nopar:Npn \xparse_exp_add_type_m:w
  {
    \int_incr:N \l_xparse_m_args_int
    \xparse_exp_set:cpx
      {
        \exp_after:wN \token_to_str:N \l_xparse_function_tl
        \int_use:N \l_xparse_total_args_int
      }
      ##1 \q_xparse ##2
      {
        \exp_not:c
          {
            \exp_after:wN \token_to_str:N \l_xparse_function_tl
            \int_eval:n { \l_xparse_total_args_int + 1 }
          }
            ##1 {##2} \exp_not:N \q_xparse
      }
    \xparse_exp_prepare_function:N
  }
\cs_new_protected:Npn \xparse_exp_add_type_t:w #1
  {
    \tl_set:Nx \l_xparse_tmp_tl
      {
        \exp_after:wN \token_to_str:N \l_xparse_function_tl
        \int_eval:n { \l_xparse_total_args_int + 1 }
      }
    \xparse_exp_set:cpx
      {
        \exp_after:wN \token_to_str:N \l_xparse_function_tl
        \int_use:N \l_xparse_total_args_int
      }
      ##1 \q_xparse ##2
      {
        \exp_not:N \tl_if_head_eq_charcode:nNTF {##2} #1
          {
            \exp_not:c { \l_xparse_tmp_tl }
            ##1 \exp_not:n { { \BooleanTrue } \q_xparse }
          }
          {
            \exp_not:c { \l_xparse_tmp_tl }
            ##1 \exp_not:n { { \BooleanFalse } \q_xparse {##2} }
          }
      }
    \xparse_exp_prepare_function:N
  }
\cs_new_protected:Npn \xparse_exp_add_type_u:w #1
  {
    \xparse_exp_set:cpx
      {
        \exp_after:wN \token_to_str:N \l_xparse_function_tl
        \int_use:N \l_xparse_total_args_int
      }
      ##1 \q_xparse ##2 #1
      {
        \exp_not:c
          {
            \exp_after:wN \token_to_str:N \l_xparse_function_tl
            \int_eval:n { \l_xparse_total_args_int + 1 }
          }
          ##1 {##2} \exp_not:N \q_xparse
    }
    \xparse_exp_prepare_function:N
  }
\cs_new_protected_nopar:Npn \xparse_exp_check_and_add:N #1
  {
    \cs_if_free:cTF { xparse_exp_add_type_ #1 :w }
      {
        \msg_error:nnx { xparse } { unknown-argument-type }
          { \tl_to_str:n {#1} }
        \tl_set:Nn \l_xparse_last_arg_tl { m }
        \xparse_exp_add_type_m:w
      }
      {
        \tl_set:Nn \l_xparse_last_arg_tl {#1}
        \use:c { xparse_exp_add_type_ #1 :w }
      }
  }
\cs_new_protected:Npn \xparse_exp_declare_cmd:Nnn #1#2#3
  {
    \cs_if_exist:NTF #1
      {
        \msg_warning:nnxx { xparse } { redefine-command }
          { \token_to_str:N #1 } { \tl_to_str:n {#2} }
      }
      {
        \msg_info:nnxx { xparse } { define-command }
          { \token_to_str:N #1 } { \tl_to_str:n {#2} }
      }
    \group_begin:
      \tex_escapechar:D 92 \scan_stop:
      \tl_set:Nx \l_xparse_function_tl { \token_to_str:N #1}
    \exp_args:NNNo \group_end:
    \tl_set:Nn \l_xparse_function_tl { \l_xparse_function_tl }
    \xparse_exp_prepare_function:n {#2}
    \int_compare:nNnTF \l_xparse_total_args_int = \l_xparse_m_args_int
      { \xparse_exp_declare_cmd_all_m:Nn #1 {#3} }
      { \xparse_exp_declare_cmd_mixed:Nn #1 {#3} }
  }
\cs_new_protected:Npn \xparse_exp_declare_cmd_all_m:Nn #1#2
  {
    \bool_if:NTF \l_xparse_long_bool
      {
        \cs_generate_from_arg_count:NNnn
          #1 \cs_set:Npn \l_xparse_total_args_int {#2}
      }
      {
        \cs_generate_from_arg_count:NNnn
          #1 \cs_set_nopar:Npn \l_xparse_total_args_int {#2}
      }
  }
\cs_new_protected:Npn \xparse_exp_declare_cmd_mixed:Nn #1#2
  {
    \tl_if_in:noTF { l m u } \l_xparse_last_arg_tl
      { \xparse_exp_declare_cmd_mixed_aux:Nn #1 {#2} }
      { \msg_error:nn { xparse } { expandable-ending-optional } }
  }
\cs_new_protected:Npn \xparse_exp_declare_cmd_mixed_aux:Nn #1#2
  {
    \cs_set_nopar:Npx #1
      { \exp_not:c { \token_to_str:N #1 1 } x \exp_not:N \q_xparse }
    \cs_set_nopar:cpx
      { \token_to_str:N #1 \int_eval:n { \l_xparse_total_args_int + 1  } }
      x ##1 \q_xparse
      { \exp_not:c { \token_to_str:N #1 } ##1 }
    \cs_generate_from_arg_count:cNnn
      { \token_to_str:N #1 } \cs_set:Npn \l_xparse_total_args_int {#2}
  }
\cs_new_protected:Npn \xparse_exp_prepare_function:n #1
  {
    \bool_set_false:N \l_xparse_error_bool
    \tl_if_in:nnT {#1} { > }
      {
        \msg_error:nnxx { xparse } { processor-in-expandable }
          { \tl_to_str:n {#1} }
        \bool_set_true:N \l_xparse_error_bool
      }
    \tl_if_in:nnT {#1} { g }
      {
        \msg_error:nnxx { xparse } { grouped-in-expandable }
          { g } { \tl_to_str:n {#1} }
        \bool_set_true:N \l_xparse_error_bool
      }
    \tl_if_in:nnT {#1} { G }
      {
        \msg_error:nnxx { xparse } { grouped-in-expandable }
          { G } { \tl_to_str:n {#1} }
        \bool_set_true:N \l_xparse_error_bool
      }
    \tl_if_in:nnT {#1} { v }
      {
        \msg_error:nnxx { xparse } { verbatim-in-expandable }
          { v } { \tl_to_str:n {#1} }
        \bool_set_true:N \l_xparse_error_bool
      }
    \bool_if:NF \l_xparse_error_bool
      { \xparse_exp_prepare_function_aux:n {#1} }
  }
\cs_new_protected:Npn \xparse_exp_prepare_function_aux:n #1
  {
    \cs_set_eq:NN \xparse_prepare_next:w \xparse_exp_prepare_function:N
    \cs_set_eq:NN \xparse_exp_set:cpx \cs_set_nopar:cpx
    \bool_set_false:N \l_xparse_long_bool
    \int_zero:N \l_xparse_m_args_int
    \int_zero:N \l_xparse_total_args_int
    \tl_if_in:nnT {#1} { + }
      {
        \bool_set_true:N \l_xparse_long_bool
        \cs_set_eq:NN \xparse_exp_set:cpx \cs_set:cpx
      }
    \xparse_exp_prepare_function:N #1 \q_nil
  }
\cs_new_protected:Npn \xparse_exp_prepare_function:N #1
  {
    \bool_if:NTF \l_xparse_long_bool
      { \xparse_exp_prepare_function_long:N #1 }
      { \xparse_exp_prepare_function_short:N #1 }
}
\cs_new_protected:Npn \xparse_exp_prepare_function_long:N #1
  {
    \quark_if_nil:NF #1
      {
        \str_if_eq:nnTF {#1} { + }
          { \xparse_exp_prepare_function_short:N }
          {
            \msg_error:nn { xparse } { inconsistent-long }
            \xparse_exp_prepare_function_short:N #1
          }
      }
  }
\cs_new_protected:Npn \xparse_exp_prepare_function_short:N #1
  {
    \quark_if_nil:NF #1
      {
        \prop_get:NnNTF \c_xparse_shorthands_prop {#1} \l_xparse_tmp_tl
          {
            \bool_if:NT \l_xparse_long_bool
              { \tl_put_left:Nn \l_xparse_tmp_tl { + }  }
            \exp_after:wN \xparse_exp_prepare_function:N \l_xparse_tmp_tl
          }
          {
            \int_incr:N \l_xparse_total_args_int
            \xparse_exp_check_and_add:N #1
          }
      }
  }
\cs_new_eq:NN \xparse_exp_set:cpx \cs_set_nopar:cpx
\cs_new_protected:Npn \xparse_get_arg_spec:N #1
  {
    \cs_if_exist:cTF { l_xparse_ \token_to_str:N #1 _arg_spec_tl }
      {
        \tl_set_eq:Nc \ArgumentSpecification
          { l_xparse_ \token_to_str:N #1 _arg_spec_tl }
      }
      {
        \msg_error:nnx { xparse } { unknown-document-command }
          { \token_to_str:N #1 }
      }
  }
\cs_new_protected:Npn \xparse_get_arg_spec:n #1
  {
    \cs_if_exist:cTF { l_xparse_ #1 _arg_spec_tl }
      { \tl_set_eq:Nc \ArgumentSpecification { l_xparse_ #1 _arg_spec_tl } }
      {
        \msg_error:nnx { xparse } { unknown-document-environment }
          { \tl_to_str:n {#1} }
      }
  }
\tl_new:N \ArgumentSpecification
\cs_new_protected:Npn \xparse_show_arg_spec:N #1
  {
    \cs_if_exist:cTF { l_xparse_ \token_to_str:N #1 _arg_spec_tl }
      {
        \tl_set_eq:Nc \ArgumentSpecification
          { l_xparse_ \token_to_str:N #1 _arg_spec_tl }
        \tl_show:N \ArgumentSpecification
      }
      {
        \msg_error:nnx { xparse } { unknown-document-command }
          { \token_to_str:N #1 }
      }
  }
\cs_new_protected:Npn \xparse_show_arg_spec:n #1
  {
    \cs_if_exist:cTF { l_xparse_ #1 _arg_spec_tl }
      {
        \tl_set_eq:Nc \ArgumentSpecification { l_xparse_ #1 _arg_spec_tl }
        \tl_show:N \ArgumentSpecification
      }
      {
        \msg_error:nnx { xparse } { unknown-document-environment }
          { \tl_to_str:n {#1} }
      }
  }
\msg_new:nnnn { xparse } { command-already-defined }
  { Command~'#1'~already~defined! }
  {
    You~have~used~\NewDocumentCommand
    with~a~command~that~already~has~a~definition. \\
    The~existing~definition~of~'#1'~will~be~overwritten.
  }
\msg_new:nnnn { xparse } { command-not-yet-defined }
  { Command ~'#1'~not~yet~defined! }
  {
    You~have~used~\RenewDocumentCommand
    with~a~command~that~was~never~defined.\\
    A~new~command~'#1'~will~be~created.
  }
\msg_new:nnnn { xparse } { environment-already-defined }
  { Environment~'#1'~already~defined! }
  {
    You~have~used~\NewDocumentEnvironment
    with~an~environment~that~already~has~a~definition.\\
    The~existing~definition~of~'#1'~will~be~overwritten.
  }
\msg_new:nnnn { xparse } { environment-mismatch }
  { Mismatch~between~start~and~end~of~environment. }
  {
    The~current~environment~is~called~'#1',~but~you~have~tried~to~
    end~one~called~'#2'.~Environments~have~to~be~properly~nested.
  }
\msg_new:nnnn { xparse } { environment-not-yet-defined }
  { Environment~'#1'~not~yet~defined! }
  {
    You~have~used~\RenewDocumentEnvironment
    with~an~environment~that~was~never~defined.\\
    A~new~environment~'#1'~will~be~created.
  }
\msg_new:nnnn { xparse } { environment-unknown }
  { Environment~'#1'~undefined. }
  {
    You~have~tried~to~start~an~environment~called~'#1',~
    but~this~has~never~been~defined.\\
    The~command~will~be~ignored.
  }
\msg_new:nnnn { xparse } { expandable-ending-optional }
  { Signature~for~expandable~command~ends~with~optional~argument. }
  {
    \c_msg_coding_error_text_tl
    Expandable~commands~must~have~a~final~mandatory~argument~
    (or~no~arguments~at~all).~You~cannot~have~a~terminal~optional~
    argument~with~expandable~commands.
  }
\msg_new:nnnn { xparse } { grouped-in-expandable }
  { Argument~specifier~'#1'~forbidden~in~expandable~commands. }
  {
    \c_msg_coding_error_text_tl
    Argument~specification~'#2'~contains~the~optional~grouped~
    argument~'#1':~
    this~is only~supported~for~standard~robust~functions.
  }
\msg_new:nnnn { xparse } { inconsistent-long }
  { Inconsistent~long~arguments~for~expandable~command. }
  {
    \c_msg_coding_error_text_tl
    The~arguments~for~an~expandable~command~must~either~all~be~
    short~or~all~be~long.~You~have~tried~to~mix~the~two~types.
  }
\msg_new:nnnn { xparse } { processor-in-expandable }
  { Argument~processors~cannot~be~used~with~expandable~functions. }
  {
    \c_msg_coding_error_text_tl
    Argument~specification~'#1'~contains~a~processor~function:~
    this~is~only~supported~for~standard~robust~functions.
  }
\msg_new:nnnn { xparse } { split-excess-tokens }
  { Too~many~'#1'~tokens~when~trying~to~split~argument. }
  {
    LaTeX~was~asked~to~split~the~input~'#3'~
    at~each~occurrence~of~the~token~'#1',~up~to~a~maximum~of~#2~parts.~
    There~were~too~many~'#1'~tokens.
  }
\msg_new:nnnn { xparse } { unknown-argument-type }
  { Unknown~argument~type~'#1'~replaced~by~'m'. }
  {
    \c_msg_coding_error_text_tl
    The~letter~'#1'~does~not~specify~a~known~argument~type.~
    LaTeX~will~assume~you~want~a~standard~mandatory~argument~(type~'m').
  }
\msg_new:nnnn { xparse } { unknown-document-command }
  { Unknown~document~command~'#1'. }
  {
    You~have~asked~for~the~argument~specification~for~a~command~'#1',~
    but~this~is~not~a~document~command.
  }
\msg_new:nnnn { xparse } { unknown-document-environment }
  { Unknown~document~environment~'#1'. }
  {
    You~have~asked~for~the~argument~specification~for~a~command~'#1',~
    but~this~is~not~a~document~environment.
  }
\msg_new:nnnn { xparse } { verbatim-newline }
  { Verbatim~argument~of~#1~ended~by~end~of~line. }
  {
    Short~verbatim~arguments~cannot~contain~newlines.~
    I~suspect~you've~forgotten~the~closing~delimiter~of~#1.
    I~will~ignore~'#2'.
  }
\msg_new:nnnn { xparse } { verbatim-already-tokenized }
  { Verbatim~command~#1~illegal~in~command~argument. }
  {
    The~command~#1~takes~a~verbatim~argument.~It~may~not~appear~within~
    the~argument~of~another~function.~I~will~ignore~'#2'.
  }

\msg_new:nnnn { xparse } { verbatim-in-expandable }
  { Argument~specifier~'#1'~forbidden~in~expandable~commands. }
  {
    \c_msg_coding_error_text_tl
    Argument~specification~'#2'~contains~the~verbatim~argument~'#1':~
    this~is only~supported~for~standard~robust~functions.
  }
\msg_new:nnn { xparse } { define-command }
  {
    Defining~document~command~#1~
    with~arg.~spec.~'#2'~\msg_line_context:.
  }
\msg_new:nnn { xparse } { define-environment }
  {
    Defining~document~environment~'#1'~
    with~arg.~spec.~'#2'~\msg_line_context:.
  }
\msg_new:nnn { xparse } { redefine-command }
  {
    Redefining~document~command~#1~
    with~arg.~spec.~'#2'~\msg_line_context:.
  }
\msg_new:nnn { xparse } { redefine-environment }
  {
    Redefining~document~environment~'#1'~
    with~arg.~spec.~'#2'~\msg_line_context:.
  }
\cs_new_eq:NN \BooleanFalse \c_false_bool
\cs_new_eq:NN \BooleanTrue  \c_true_bool
\cs_new_protected:Npn \DeclareDocumentCommand #1#2#3
  { \xparse_declare_cmd:Nnn #1 {#2} {#3} }
\cs_new_protected:Npn \NewDocumentCommand #1#2#3
  {
    \cs_if_exist:NTF #1
      {
        \msg_error:nnx { xparse } { command-already-defined }
          { \token_to_str:N #1 }
      }
      { \xparse_declare_cmd:Nnn #1 {#2} {#3} }
  }
\cs_new_protected:Npn \RenewDocumentCommand #1#2#3
  {
    \cs_if_exist:NTF #1
      { \xparse_declare_cmd_aux:Nnn #1 {#2} {#3} }
      {
        \msg_error:nnx { xparse } { command-not-yet-defined }
          { \token_to_str:N #1 }
      }
  }
\cs_new_protected:Npn \ProvideDocumentCommand #1#2#3
  { \cs_if_exist:NF #1 { \xparse_declare_cmd:Nnn #1 {#2} {#3} } }
\cs_new_protected:Npn \DeclareDocumentCommandImplementation #1#2#3
  { \xparse_declare_cmd_implementation:nNn {#1} #2 {#3} }
\cs_new_protected:Npn \DeclareDocumentCommandInterface #1#2#3
  { \xparse_declare_cmd_interface:Nnn #1 {#2} {#3} }
\cs_new_protected:Npn \DeclareDocumentEnvironment #1#2#3#4
  { \xparse_declare_env:nnnn {#1} {#2} {#3} {#4} }
\cs_new_protected:Npn \NewDocumentEnvironment #1#2#3#4
  {
    \cs_if_exist:cTF {#1}
      { \msg_error:nnx { xparse } { environment-already-defined } {#1} }
      { \xparse_declare_env:nnnn {#1} {#2} {#3} {#4} }
}
\cs_new_protected:Npn \RenewDocumentEnvironment #1#2#3#4
  {
    \cs_if_exist:cTF {#1}
      { \xparse_declare_env:nnnn {#1} {#2} {#3} {#4} }
      { \msg_error:nnx { xparse } { environment-not-yet-defined } {#1} }
  }
\cs_new_protected:Npn \ProvideDocumentEnvironment #1#2#3#4
  { \cs_if_exist:cF { #1 } { \xparse_declare_env:nnnn {#1} {#2} {#3} {#4} } }
\cs_new_protected:Npn \DeclareExpandableDocumentCommand #1#2#3
  { \xparse_exp_declare_cmd:Nnn #1 {#2} {#3} }
\cs_new_eq:NN \IfBooleanTF \bool_if:NTF
\cs_new_eq:NN \IfBooleanT  \bool_if:NT
\cs_new_eq:NN \IfBooleanF  \bool_if:NF
\cs_new_eq:NN \IfNoValueF  \xparse_if_no_value:nF
\cs_new_eq:NN \IfNoValueT  \xparse_if_no_value:nT
\cs_new_eq:NN \IfNoValueTF \xparse_if_no_value:nTF
\cs_set:Npn \IfValueF { \xparse_if_no_value:nT }
\cs_set:Npn \IfValueT { \xparse_if_no_value:nF }
\cs_set:Npn \IfValueTF #1#2#3 { \xparse_if_no_value:nTF {#1} {#3} {#2} }
\cs_new_protected:Npn \NoValue { -NoValue- }
\tl_new:N \ProcessedArgument
\cs_new_eq:NN \ReverseBoolean \xparse_bool_reverse:N
\cs_new_eq:NN \SplitArgument \xparse_split_argument:nnn
\cs_new_eq:NN \SplitList     \xparse_split_list:nn
\cs_new_eq:NN \TrimSpaces    \xparse_trim_spaces:n
\cs_new_eq:NN \GetDocumentCommandArgSpec      \xparse_get_arg_spec:N
\cs_new_eq:NN \GetDocumentEnvironmmentArgSpec \xparse_get_arg_spec:n
\cs_new_eq:NN \ShowDocumentCommandArgSpec     \xparse_show_arg_spec:N
\cs_new_eq:NN \ShowDocumentEnvironmentArgSpec \xparse_show_arg_spec:n
\DeclareOption { log-declarations = true } { }
\DeclareOption { log-declarations = false }
  {
    \msg_redirect_module:nnn { xparse } { info }    { none }
    \msg_redirect_module:nnn { xparse } { warning } { none }
  }
\DeclareOption { log-declarations } { }
\ProcessOptions \scan_stop:
%% 
%%
%% End of file `xparse.sty'.
