%%
%% This is file `xparse.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% xparse.dtx  (with options: `package')
%% 
%% (C) Copyright The LaTeX3 Project and any individual authors
%% listed elsewhere in this file.
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%% This is a generated file.
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%% This file was generated from file(s) of the xbase bundle.
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%% This file may only be distributed together with a copy of this bundle.
%% You may however distribute the bundle without such generated files.
%% 
%% ======================================================================
%% 
%% File: xparse.dtx (C) Copyright 1999 Frank Mittelbach, Chris Rowley, David Carlisle
%%                  (C) Copyright 2004-2006 Frank Mittelbach, 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
%%
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%%
%% This file is part of the ``xbase 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/cgi-bin/cvsweb.cgi/
%%
%% 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
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%%
%% -----------------------------------------------------------------------
%%
\RequirePackage{l3names}
\GetIdInfo$Id: xparse.dtx 574 2006-08-21 23:30:10Z morten $
          {generic document command parser}
\RequirePackage{l3tlp,l3num,l3toks,l3prg,l3int,l3seq,l3token}
\def_new:NNn \xparse_already_defined_error_msg:N 1 {
  \xparse_error:x {
    Command~name~`\token_to_string:N #1'~ already~defined!
  }
}
\def_new:NNn \xparse_not_yet_defined_error_msg:N 1 {
  \xparse_error:x {
    Command~`\token_to_string:N #1'~ not~ yet~defined!
  }
}
\def_new:NNn \xparse_begins_with_end_error_msg:N 1 {
  \xparse_error:x {
    Command~`\token_to_string:N #1'~begins~with~
    `\token_to_string:N \end'!
  }
}
\def_new:NNn \xparse_unknown_arg_type_error_msg:N 1{
  \xparse_error:x {
    Unknown~ argument~ type~ `#1'~
    I'll~ substitute~ it~ with~ `m'~ for~ now.~ Fingers~ crossed...
  }
}
\def_new:NNn \xparse_no_command_implementation_warning:n 1 {
  \xparse_warning:x {No~ implementation~ for~ `#1'~ defined}
}
\def_new:NNn \xparse_error:x 1{\tex_errmessage:D {xparse~error:~#1}}
\def_new:NNn \xparse_warning:x 1{\io_put_term:x{xparse~warning:~#1}}
\def_new:NNn \xparse_if_definable:NTF 1 {
  \cs_free:NTF #1
  {
    \xparse_begins_with_end:NTF #1
    { \xparse_begins_with_end_error_msg:N #1 \use_arg_ii:nn }
    \use_arg_i:nn
  }
  { \xparse_already_defined_error_msg:N #1 \use_arg_ii:nn }
}
\def_new:NNn \xparse_if_definable:cTF 0 {
  \exp_args:Nc \xparse_if_definable:NTF
}
\def_new:NNn \xparse_if_redefinable:NTF 1 {
  \cs_free:NTF #1
  { \xparse_not_yet_defined_error_msg:N #1 \use_arg_ii:nn }
  {
    \xparse_begins_with_end:NTF #1
    { \xparse_begins_with_end_error_msg:N #1 \use_arg_ii:nn }
    \use_arg_i:nn
  }
}
\def_new:NNn \xparse_if_redefinable:cTF  0 {
  \exp_args:Nc \xparse_if_redefinable:NTF
}
\def_new:NNn \xparse_begins_with_end:NTF 1 {
  \group_begin:
    \exp_args:Nc \xparse_begins_with_end_aux:N {
      \tlist_head_iii:f { \cs_to_str:N #1 ??}
    }
}
\def_new:NNn \xparse_begins_with_end_aux:N 1 {
  \if:w \cs_if_eq_name_p:NN #1 \end
    \group_end:
    \exp_after:NN \use_arg_i:nn
  \else:
    \group_end:
    \exp_after:NN \use_arg_ii:nn
  \fi:
}
\def_new:NNn \DeclareDocumentCommand 1 {
  \xparse_if_definable:NTF #1
  { \xparse_declare_document_command:Nnn #1 }
  \use_none:nn
}
\def_new:NNn \ReDeclareDocumentCommand 1 {
  \xparse_if_redefinable:NTF #1
  { \xparse_declare_document_command:Nnn #1 }
  \use_none:nn
}
\def_new:NNn \DeclareDocumentEnvironment 1 {
  \xparse_if_definable:cTF {#1}
  { \xparse_declare_document_environment:nnnn {#1} }
  \use_none:nnn
}
\def_new:NNn \ReDeclareDocumentEnvironment 1 {
  \xparse_if_redefinable:cTF {#1}
  { \xparse_declare_document_environment:nnnn {#1} }
  \use_none:nnn
}
\def_new:NNn \ProvideDocumentCommand 1{
  \cs_free:NTF #1
  { \DeclareDocumentCommand #1}
  \use_none:nn
}
\def_new:NNn \ProvideDocumentEnvironment 1{
  \cs_free:cTF {#1}
  { \DeclareDocumentEnvironment {#1} }
  \use_none:nnn
}
\toks_new:N \l_xparse_grabbed_args_toks
\toks_new:N \l_xparse_end_environment_args_toks
\int_new:N \l_xparse_mandatory_args_int
\int_new:N \l_xparse_total_args_int
\def_long:NNn \xparse_declare_document_command:Nnn 3{
  \xparse_prepare_signature:n {#2}
  \def_protected:Npx #1 {
    \exp_not:n { \toks_set:Nn \l_xparse_grabbed_args_toks }
    {\exp_not:c {\token_to_string:N #1}}
    \toks_use:N \l_xparse_grabbed_args_toks
    \exp_not:n{ \toks_use:N \l_xparse_grabbed_args_toks}
  }
  \def_long:cNn {\token_to_string:N #1}\l_xparse_total_args_int{#3}
}
\def_new:Npn \xparse_declare_document_command:cnn {
  \exp_args:Nc \xparse_declare_document_command:Nnn
}
\def_long_new:NNn \xparse_declare_document_environment:nnnn 4 {
  \xparse_declare_document_command:cnn {#1}{#2}
  { \group_begin:
      \toks_set_eq:NN \l_xparse_end_environment_args_toks
                      \l_xparse_grabbed_args_toks
      #3
  }
  \let:cN {end #1} \xparse_parsed_end_environment:
  \def_long:cNn {end \token_to_string:N \\ #1}
    \l_xparse_total_args_int{#4}
}
\def_protected_new:NNn \xparse_parsed_end_environment: 0{
  \exp_after:NN \xparse_parsed_end_environment_aux:N
    \toks_use:N \l_xparse_end_environment_args_toks
  \group_end:
}
\def_new:NNn \xparse_parsed_end_environment_aux:N 1{
  \cs_use:c {end \token_to_string:N #1 }
}
\def_long_new:NNn \DeclareDocumentCommandInterface 3{
  \xparse_prepare_signature:n {#3}
  \def_protected:Npx #1 {
    \exp_not:n { \toks_set:Nn \l_xparse_grabbed_args_toks }
    {\exp_not:c {impl-#2}}
    \toks_use:N\l_xparse_grabbed_args_toks
    \exp_not:n{ \toks_use:N \l_xparse_grabbed_args_toks}
  }
  \def_long:cNn {impl-#2} \l_xparse_total_args_int
    {\xparse_undefined_command_implementation:n{#2}}
}
\def_new:NNn \xparse_undefined_command_implementation:n 1{
  ``#1''
  \xparse_no_command_implementation_warning:n {#1}
}
\def_long_new:NNn \DeclareDocumentCommandImplementation 3{
  \def_long:cNn {impl-#1}#2{#3}
}
\def_new:NNn \xparse_prepare_signature:n 1 {
  \int_zero:N \l_xparse_total_args_int
  \toks_clear:N \l_xparse_grabbed_args_toks
  \int_zero:N \l_xparse_mandatory_args_int
  \bool_gset_false:N \g_xparse_insert_marker_bool
  \bool_gset_false:N \g_xparse_allow_par_bool
  \tlp_gset_eq:NN \g_xparse_ignore_marker_tlp
                  \g_xparse_ignore_spaces_marker_tlp
  \xparse_parse_signature:n #1 \q_nil
}
\tlp_new:Nn \g_xparse_ignore_marker_tlp {}
\seq_new:N \g_xparse_ignore_marker_seq
\bool_new:N \g_xparse_insert_marker_bool
\def_new:cpn {xparse_add_arg_type_>:} #1
  \xparse_read_arg_type_or_grab_default:n #2{
  \xparse_add_remaining_m_args:
  \bool_gset_true:N \g_xparse_insert_marker_bool
  \int_decr:N \l_xparse_total_args_int
  \tlist_map_inline:nn{#2}{
    \xparse_check_and_add_argument_type:N ##1
  }
  \xparse_parse_signature:n
}
\def_new:NNn \xparse_add_ignore_marker:Nnn 3{
  \tlp_new:cn {g_xparse #2 _marker_tlp}{#3}
  \seq_gpush:NC \g_xparse_ignore_marker_seq {g_xparse #2 _marker_tlp}
  \def_new:cpn {xparse_add_arg_type_#1:}{
    \tlp_gset_eq:Nc \g_xparse_ignore_marker_tlp {g_xparse #2 _marker_tlp}
  }
}
\xparse_add_ignore_marker:Nnn W{_ignore_nothing}{}
\xparse_add_ignore_marker:Nnn i{_ignore_spaces}{_ignore_spaces}
\xparse_add_ignore_marker:Nnn I{_ignore_pars}{_ignore_pars}
\def_new:NNn \xparse_add_arg_type_P: 0{
  \bool_gset_true:N \g_xparse_allow_par_bool
}
\bool_new:N \g_xparse_allow_par_bool
\def_new:NNn \xparse_parse_signature:n 1{
  \quark_if_nil:NTF #1
  {
    \xparse_add_remaining_m_args:
  }
  {
    \int_incr:N \l_xparse_total_args_int
    \xparse_check_and_add_argument_type:N #1
    \bool_if:NT \g_xparse_insert_marker_bool
    {
      \bool_gset_false:N \g_xparse_insert_marker_bool
      \bool_gset_false:N \g_xparse_allow_par_bool
      \tlp_gset_eq:NN \g_xparse_ignore_marker_tlp
                      \g_xparse_ignore_spaces_marker_tlp
    }
    \xparse_read_arg_type_or_grab_default:n
  }
}
\def_new:NNn \xparse_check_and_add_argument_type:N 1 {
  \cs_free:cTF {xparse_add_arg_type_#1:}
  { \xparse_unknown_arg_type_error_msg:N #1
    \int_incr:N \l_xparse_mandatory_args_int
  }
  { \cs_use:c {xparse_add_arg_type_#1:} }
}
\let_new:NN \xparse_read_arg_type_or_grab_default:n
            \xparse_parse_signature:n
\def_new:NNn \xparse_grab_default_arg:n 1{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks {{#1}}
  \let:NN \xparse_read_arg_type_or_grab_default:n
          \xparse_parse_signature:n
  \xparse_parse_signature:n
}
\def_long_new:NNn \xparse_grab_default_arg_allow_par:n 1{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks {{#1}}
  \let:NN \xparse_read_arg_type_or_grab_default:n
          \xparse_parse_signature:n
  \xparse_parse_signature:n
}
\def_new:Npn \xparse_add_arg_type_m: {
  \bool_if:NTF \g_xparse_allow_par_bool
  {
    \toks_put_right:Nn \l_xparse_grabbed_args_toks {\xparse_allow_par_m:w}
  }
  { \int_incr:N \l_xparse_mandatory_args_int }
}
\def_new:Npn \xparse_add_remaining_m_args: {
  \int_compare:nNnF \l_xparse_mandatory_args_int = \c_zero
  {
    \toks_put_right:Nx \l_xparse_grabbed_args_toks {
      \exp_not:c{xparse_m
        \int_use:N \l_xparse_mandatory_args_int
        :w }
    }
    \int_zero:N \l_xparse_mandatory_args_int
  }
}
\def_new:cpn {xparse_m1:w} #1 \l_xparse_grabbed_args_toks#2{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks{{#2}}
  #1 \l_xparse_grabbed_args_toks
}
\def_new:cpn {xparse_m2:w} #1 \l_xparse_grabbed_args_toks #2#3{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks{{#2}{#3}}
  #1 \l_xparse_grabbed_args_toks
}
\def_new:cpn {xparse_m3:w} #1 \l_xparse_grabbed_args_toks #2#3#4{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks{{#2}{#3}{#4}}
  #1 \l_xparse_grabbed_args_toks
}
\def_new:cpn {xparse_m4:w} #1 \l_xparse_grabbed_args_toks #2#3#4#5{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks{{#2}{#3}{#4}{#5}}
  #1 \l_xparse_grabbed_args_toks
}
\def_new:cpn {xparse_m5:w} #1 \l_xparse_grabbed_args_toks #2#3#4#5#6{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks{{#2}{#3}{#4}{#5}{#6}}
  #1 \l_xparse_grabbed_args_toks
}
\def_new:cpn {xparse_m6:w} #1 \l_xparse_grabbed_args_toks #2#3#4#5#6#7{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks
                     {{#2}{#3}{#4}{#5}{#6}{#7}}
  #1 \l_xparse_grabbed_args_toks
}
\def_new:cpn {xparse_m7:w} #1 \l_xparse_grabbed_args_toks#2#3#4#5#6#7#8{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks
                     {{#2}{#3}{#4}{#5}{#6}{#7}{#8}}
  #1 \l_xparse_grabbed_args_toks
}
\def_new:cpn {xparse_m8:w} #1\l_xparse_grabbed_args_toks
                                                       #2#3#4#5#6#7#8#9{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks
                     {{#2}{#3}{#4}{#5}{#6}{#7}{#8}{#9}}
  #1 \l_xparse_grabbed_args_toks
}
\def_new:cpn {xparse_m9:w} \toks_use:N \l_xparse_grabbed_args_toks
                                                     #1#2#3#4#5#6#7#8#9{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks
                     {{#1}{#2}{#3}{#4}{#5}{#6}{#7}{#8}{#9}}
  \toks_use:N \l_xparse_grabbed_args_toks
}
\def_long_new:Npn \xparse_allow_par_m:w #1 \l_xparse_grabbed_args_toks#2{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks{{#2}}
  #1 \l_xparse_grabbed_args_toks
}
\def_new:Npn \xparse_add_arg_type_l: {
  \xparse_add_remaining_m_args:
  \bool_if:NTF \g_xparse_allow_par_bool
  {
    \toks_put_right:Nn \l_xparse_grabbed_args_toks {\xparse_allow_par_l:w}
  }
  { \toks_put_right:Nn \l_xparse_grabbed_args_toks {\xparse_l:w} }
}
\def_new:Npn \xparse_l:w #1 \l_xparse_grabbed_args_toks#2#{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks{{#2}}
  #1 \l_xparse_grabbed_args_toks
}
\def_long_new:Npn \xparse_allow_par_l:w #1 \l_xparse_grabbed_args_toks#2#{
  \toks_put_right:Nn \l_xparse_grabbed_args_toks{{#2}}
  #1 \l_xparse_grabbed_args_toks
}
\def_new:NNn \DeclareSymbolArgument 2{
  \seq_map_variable:NNn \g_xparse_ignore_marker_seq \l_tmpa_tlp {
    \def:cpx {xparse \l_tmpa_tlp _#1:w}##1##2\l_xparse_grabbed_args_toks{
      \exp_not:c{peek_ #2 _remove \l_tmpa_tlp :NTF} ##1
      {
        \exp_not:N \toks_put_right:Nn \exp_not:N
        \l_xparse_grabbed_args_toks \exp_not:N \c_true
        ##2 \exp_not:N\l_xparse_grabbed_args_toks
      }
      {
        \exp_not:N \toks_put_right:Nn \exp_not:N
        \l_xparse_grabbed_args_toks \exp_not:N \c_false
        ##2 \exp_not:N\l_xparse_grabbed_args_toks
      }
    }
  }
  \def:cpn {xparse_add_arg_type_#1:} {
    \xparse_add_remaining_m_args:
    \toks_put_right:Nx \l_xparse_grabbed_args_toks
    { \exp_not:c {xparse \g_xparse_ignore_marker_tlp _#1:w } }
    \let:NN \xparse_read_arg_type_or_grab_default:n \xparse_grab_default_arg:n
  }
}
\DeclareSymbolArgument S{meaning}
\def_new:NNn \DeclareArgumentType 7{
  \seq_map_variable:NNn \g_xparse_ignore_marker_seq \l_tmpa_tlp {
    \def:cpx {xparse \l_tmpa_tlp _#1:w}##1\l_xparse_grabbed_args_toks{
      \exp_not:c{peek_#3 \l_tmpa_tlp :NTF} \exp_not:N #2
      { \exp_not:c{xparse_#1_#3_help:nw}{##1} }
      {
        \exp_not:n {
          #4 \toks_put_right:Nn \l_xparse_grabbed_args_toks {#5}
        }
        ##1 \exp_not:N\l_xparse_grabbed_args_toks
      }
    }
    \def_long:cpx {xparse_allow_par \l_tmpa_tlp _#1:w}##1
    \l_xparse_grabbed_args_toks{
      \exp_not:c{peek_#3 \l_tmpa_tlp :NTF} \exp_not:N #2
      { \exp_not:c{xparse_allow_par_#1_#3_help:nw}{##1} }
      {
        \exp_not:n {
          #4 \toks_put_right:Nn \l_xparse_grabbed_args_toks {#5}
        }
        ##1 \exp_not:N\l_xparse_grabbed_args_toks
      }
    }
  }
  \def:cpn {xparse_add_arg_type_#1:} {
    \xparse_add_remaining_m_args:
    \toks_put_right:Nx \l_xparse_grabbed_args_toks {
      \exp_not:c {xparse
        \bool_if:NT \g_xparse_allow_par_bool {_allow_par}
        \g_xparse_ignore_marker_tlp
        _#1:w
      }
    }
    \let:NN \xparse_read_arg_type_or_grab_default:n \xparse_parse_signature:n
  }
  \xparse_define_helper:Nnnn #1{#3}{#6}{#7}
}
\def_new:NNn \DeclareArgumentTypeDefaultValue 5{
  \seq_map_variable:NNn \g_xparse_ignore_marker_seq \l_tmpa_tlp {
    \def:cpx {xparse \l_tmpa_tlp _#1:w}##1##2\l_xparse_grabbed_args_toks{
      \exp_not:c{peek_#3 \l_tmpa_tlp :NTF} \exp_not:N #2
      { \exp_not:c{xparse_#1_#3_help:nw}{##2} }
      {
        \exp_not:N \toks_put_right:Nn
        \exp_not:N \l_xparse_grabbed_args_toks {{##1}}
        ##2 \exp_not:N \l_xparse_grabbed_args_toks
      }
    }
    \def_long:cpx {xparse_allow_par \l_tmpa_tlp _#1:w}##1##2
    \l_xparse_grabbed_args_toks{
      \exp_not:c{peek_#3 \l_tmpa_tlp :NTF} \exp_not:N #2
      { \exp_not:c{xparse_allow_par_#1_#3_help:nw}{##2} }
      {
        \exp_not:N \toks_put_right:Nn
        \exp_not:N \l_xparse_grabbed_args_toks {{##1}}
        ##2 \exp_not:N \l_xparse_grabbed_args_toks
      }
    }
  }
  \def:cpn {xparse_add_arg_type_#1:} {
    \xparse_add_remaining_m_args:
    \toks_put_right:Nx \l_xparse_grabbed_args_toks {
      \exp_not:c {xparse
        \bool_if:NT \g_xparse_allow_par_bool {_allow_par}
        \g_xparse_ignore_marker_tlp
        _#1:w
      }
    }
    \let:Nc \xparse_read_arg_type_or_grab_default:n
    {xparse_grab_default_arg
      \bool_if:NT \g_xparse_allow_par_bool {_allow_par}
      :n
    }
  }
  \xparse_define_helper:Nnnn #1{#3}{#4}{#5}
}
\def_new:NNn \xparse_define_helper:Nnnn 4{
  \toks_set:Nn \l_tmpa_toks
  {
    #3
    {
      \toks_put_right:Nn \l_xparse_grabbed_args_toks {{#4}}
      ##1 \l_xparse_grabbed_args_toks
    }
  }
  \toks_set:Nx \l_tmpa_toks {
    \exp_not:n {\def:cpn{xparse_#1_#2_help:nw}}
    \toks_use:N \l_tmpa_toks
    \exp_not:n {\def:cpn{xparse_allow_par_#1_#2_help:nw}}
    \toks_use:N\l_tmpa_toks
  }
  \toks_use:N \l_tmpa_toks
}
\DeclareArgumentType o[{meaning}{}{\NoValue}{#1[#2]}{#2}
\DeclareArgumentType c({meaning}{
  \xparse_error:x{
    Missing~ coordinate~ argument.~ A~ value~ of~ (0,0)~ is~ assumed}
  }
  {{00}}
  {#1(#2,#3)}{{#2}{#3}}
\DeclareArgumentTypeDefaultValue O[{meaning}{#1[#2]}{#2}
\DeclareArgumentTypeDefaultValue C({meaning}{#1(#2,#3)}{{#2}{#3}}
\def_new:NNn \DeclareArgumentTypeShorthand 2{
  \def_new:cpn {xparse_add_arg_type_#1:}
    ##1 \xparse_read_arg_type_or_grab_default:n {
    \int_decr:N \l_xparse_total_args_int
    \xparse_read_arg_type_or_grab_default:n #2
  }
}
\DeclareArgumentTypeShorthand s {S{*}}
\let_new:NN \IfBooleanTF \prg_if_predicate:nTF
\let_new:NN \IfBooleanT \prg_if_predicate:nT
\let_new:NN \IfBooleanF \prg_if_predicate:nF
\tlp_new:Nn \NoValue {-NoValue-}
\tlp_new:Nn \c_xparse_hidden_no_value_tlp {\NoValue}
\def_long_new:Npn \xparse_if_no_value:nTF #1{
  \tlp_set:Nx \l_tmpa_tlp{\exp_not:n{#1}}
  \tlp_if_eq:NNTF \l_tmpa_tlp \c_xparse_hidden_no_value_tlp
  { \use_arg_i:nn }
  { \tlist_if_blank:nTF {#1}
    { \use_arg_ii:nn }
    {\peek_after:NN \xparse_if_no_value_aux: #1 \q_nil {#1} }
  }
}
\def_long_new:Npn \xparse_if_no_value_aux: {
  \tlp_set:Nx \l_tmpa_tlp{\token_get_arg_spec:N \l_peek_token }
  \tlp_if_empty:NTF \l_tmpa_tlp
  {\use_arg_i_delimit_by_q_nil:nw {\exp_args:No\xparse_if_no_value:nTF}}
  {\use_arg_i_delimit_by_q_nil:nw {\use_arg_iii:nnn}}
}
\let_new:NN \IfNoValueTF \xparse_if_no_value:nTF
\def_long_new:NNn \IfNoValueT 2 {\xparse_if_no_value:nTF{#1}{#2}{}}
\def_long_new:NNn \IfNoValueF 1 {\xparse_if_no_value:nTF {#1}{}}
\def_long_new:NNn \IfValueTF 3{\xparse_if_no_value:nTF {#1}{#3}{#2}}
\let_new:NN \IfValueT \IfNoValueF
\let_new:NN \IfValueF \IfNoValueT
\tlp_new:Nn \l_xparse_pseudo_post_arg_tlp {}
\def_long_new:NNn \DeclarePseudoArgument 4{
  \def_long:cNn {xparse_pseudo_pre_arg_#1:\prg_replicate:nn{#2}{n}}#2{#3}
  \def_long:cNn {xparse_pseudo_post_arg_#1:\prg_replicate:nn{#2}{n}}#2{#4}
   \def:cNn {xparse_pseudo_nobrace_arg_#1:N} 1 {
    ##1 \l_xparse_pseudo_post_arg_tlp
  }
  \def_long:cNx {xparse_pseudo_arg_#1:w} #2
  {
    \exp_not:c {
      xparse_pseudo_pre_arg_#1: \prg_replicate:nn{#2}{n}
    }
    \cs_use:c{def_aux_use_\int_use:N \int_eval:n{#2}_parameter:}
    \exp_not:n {\tlp_set:Nn \l_xparse_pseudo_post_arg_tlp}
    {
      \exp_not:c {xparse_pseudo_post_arg_#1:\prg_replicate:nn{#2}{n}}
      \cs_use:c{def_aux_use_\int_use:N \int_eval:n{#2}_parameter:}
    }
    \exp_not:n{ \peek_catcode_remove_ignore_spaces:NTF \c_group_begin_token }
    {
     \exp_not:n {
        \c_group_begin_token
        \group_execute_after:N \l_xparse_pseudo_post_arg_tlp
      }
    }
    {
      \exp_not:c{xparse_pseudo_nobrace_arg_#1:N}
    }
  }
}
\def_new:NNn \UsePseudoArgument 1{\cs_use:c{xparse_pseudo_arg_#1:w}}
\endinput
%%
%% End of file `xparse.sty'.