%%
%% This is file `zref-check.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% zref-check.dtx  (with options: `package')
%% 
%% This file was generated from file(s) of the LaTeX package "zref-check".
%% 
%% Copyright (C) 2021-2023  gusbrs
%% 
%% 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:
%% 
%%    https://www.latex-project.org/lppl.txt
%% 
%% and version 1.3 or later is part of all distributions of LaTeX
%% version 2005/12/01 or later.
%% 
%% 
%% This work is "maintained" (as per LPPL maintenance status) by gusbrs.
%% 
%% This work consists of the files zref-check.dtx,
%%                                 zref-check.ins,
%%                                 zref-check-doc.tex,
%%                                 zref-check-code.tex,
%%                   and the files generated from them.
%% 
%% The released version of this package is available from CTAN.
%% 
%% -----------------------------------------------------------------------
%% 
%% The development version of the package can be found at
%% 
%%    https://github.com/gusbrs/zref-check
%% 
%% for those people who are interested.
%% 
%% -----------------------------------------------------------------------
%% 
\def\zrefcheck@required@kernel{2023-11-01}
\NeedsTeXFormat{LaTeX2e}[\zrefcheck@required@kernel]
\providecommand\IfFormatAtLeastTF{\@ifl@t@r\fmtversion}
\IfFormatAtLeastTF{\zrefcheck@required@kernel}
  {}
  {%
    \PackageError{zref-check}{LaTeX kernel too old}
      {%
        'zref-check' requires a LaTeX kernel \zrefcheck@required@kernel\space or newer.%
      }%
  }%
\ProvidesExplPackage {zref-check} {2023-11-14} {0.3.5}
  {Flexible cross-references with contextual checks based on zref}
\RequirePackage { zref-user }
\RequirePackage { zref-abspage }
\RequirePackage { ifdraft }
\newcounter { zc@abschap }
\newcounter { zc@abssec } [ zc@abschap ]
\AddToHook { cmd / chapter / before }
  { \stepcounter { zc@abschap } }
\zref@newprop { zc@abschap } [0] { \int_use:N \c@zc@abschap }
\zref@addprop \ZREF@mainlist { zc@abschap }
\AddToHook { cmd / section / before }
  { \stepcounter { zc@abssec } }
\zref@newprop { zc@abssec } [0] { \int_use:N \c@zc@abssec }
\zref@addprop \ZREF@mainlist { zc@abssec }
\zref@newlist { zrefcheck-check }
\zref@addprops { zrefcheck-check }
  {
    page , % for messages
    abspage ,
    zc@abschap ,
    zc@abssec
  }
\zref@newlist { zrefcheck-end }
\zref@addprops { zrefcheck-end }
  {
    abspage ,
    zc@abschap ,
    zc@abssec
  }
\zref@newlist { zrefcheck-zrefvario }
\zref@addprops { zrefcheck-zrefvario }
  {
    page , % for messages
    abspage ,
  }
\tl_new:N \l__zrefcheck_tmpa_tl
\tl_new:N \l__zrefcheck_tmpb_tl
\tl_new:N \g__zrefcheck_tmpa_tl
\int_new:N \l__zrefcheck_tmpa_int
\bool_new:N \l__zrefcheck_tmpa_bool
\ior_new:N \g__zrefcheck_tmpa_ior
\cs_new_protected:Npn \__zrefcheck_message:nnnn #1#2#3#4
  {
    \use:c { msg_ \l__zrefcheck_msglevel_tl :nnnnn }
      { zref-check } {#1} {#2} {#3} {#4}
  }
\cs_generate_variant:Nn \__zrefcheck_message:nnnn { nnne }
\msg_new:nnn { zref-check } { check-failed }
  {
    Check~failed~\msg_line_context:.~
    Failed~check~'#1'~for~label~'#2'~on~page~#3.
  }
\msg_new:nnn { zref-check } { double-check }
  {
    Same~page~check~\msg_line_context:.~
    Double-check~'#1'~for~label~'#2'~on~page~#3.
  }
\msg_new:nnn { zref-check } { empty-label }
  {
    Check~failed~\msg_line_context:.~
    Failed~check~'#1'~for~empty~label.
  }
\msg_new:nnn { zref-check } { no-checks }
  { No~checks~for~'\iow_char:N\\zcheck'~\msg_line_context:. }
\msg_new:nnn { zref-check } { check-missing }
  { Check~'#1'~not~defined~\msg_line_context:. }
\msg_new:nnn { zref-check } { property-undefined }
  { Property~'#1'~not~defined~\msg_line_context:. }
\msg_new:nnn { zref-check } { property-not-in-label }
  { Label~'#1'~has~no~property~'#2'~\msg_line_context:. }
\msg_new:nnn { zref-check } { property-not-integer }
  { Property~'#1'~for~label~'#2'~not~an~integer~\msg_line_context:. }
\msg_new:nnn { zref-check } { hyperref-preamble-only }
  {
    Option~'hyperref'~only~available~in~the~preamble. \iow_newline:
    Use~the~starred~version~of~'\iow_char:N\\zcheck'~instead.
  }
\msg_new:nnn { zref-check } { missing-hyperref }
  { Missing~'hyperref'~package. \iow_newline: Setting~'hyperref=false'. }
\msg_new:nnn { zref-check } { ignore-ok-document-only }
  {
    Option~'#1'~only~available~in~the~document. \iow_newline:
    Use~option~'msglevel'~instead.
  }
\msg_new:nnn { zref-check } { option-preamble-only }
  { Option~'#1'~is~preamble~only~\msg_line_context:. }
\msg_new:nnn { zref-check } { closerange-not-positive-integer }
  {
    Option~'closerange'~not~a~positive~integer~\msg_line_context:.~
    Using~default~value.
  }
\msg_new:nnn { zref-check } { labelcmd-undefined }
  {
    Control~sequence~named~'#1'~used~in~option~'labelcmd'~is~not~defined.~
    Using~default~value.
  }
\msg_new:nnn { zref-check } { option-deprecated-with-alternative }
  {
    Option~'#1'~has~been~deprecated~\msg_line_context:.\iow_newline:
    Use~'#2'~instead.
  }
\msg_new:nnn { zref-check } { option-deprecated }
  { Option~'#1'~has~been~deprecated~\msg_line_context:. }
\msg_new:nnn { zref-check } { load-time-options }
  {
    'zref-check'~does~not~accept~load-time~options.~
    To~configure~package~options,~use~'\iow_char:N\\zrefchecksetup'.
  }
\cs_new_eq:NN \__zrefcheck_int_to_roman:w \__int_to_roman:w
\prg_new_conditional:Npnn \__zrefcheck_is_integer:n #1 { p, T , F , TF }
  {
    \tl_if_empty:oTF {#1}
      { \prg_return_false: }
      {
        \tl_if_empty:oTF { \__zrefcheck_int_to_roman:w -0#1 }
          { \prg_return_true:  }
          { \prg_return_false: }
      }
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_is_integer_rgx:n #1 { TF }
  {
    \regex_match:nnTF { \A\d+\Z } {#1}
      { \prg_return_true:  }
      { \prg_return_false: }
  }
\bool_new:N \l__zrefcheck_use_hyperref_bool
\bool_new:N \l__zrefcheck_warn_hyperref_bool
\keys_define:nn { zref-check }
  {
    hyperref .choice: ,
    hyperref / auto .code:n =
      {
        \bool_set_true:N \l__zrefcheck_use_hyperref_bool
        \bool_set_false:N \l__zrefcheck_warn_hyperref_bool
      } ,
    hyperref / true .code:n =
      {
        \bool_set_true:N \l__zrefcheck_use_hyperref_bool
        \bool_set_true:N \l__zrefcheck_warn_hyperref_bool
      } ,
    hyperref / false .code:n =
      {
        \bool_set_false:N \l__zrefcheck_use_hyperref_bool
        \bool_set_false:N \l__zrefcheck_warn_hyperref_bool
      } ,
    hyperref .initial:n = auto ,
    hyperref .default:n = auto
  }
\AddToHook { begindocument }
  {
    \@ifpackageloaded { hyperref }
      {
        \bool_if:NT \l__zrefcheck_use_hyperref_bool
          { \RequirePackage { zref-hyperref } }
      }
      {
        \bool_if:NT \l__zrefcheck_warn_hyperref_bool
          { \msg_warning:nn { zref-check } { missing-hyperref } }
        \bool_set_false:N \l__zrefcheck_use_hyperref_bool
      }
    \keys_define:nn { zref-check }
      {
        hyperref .code:n =
          { \msg_warning:nn { zref-check } { hyperref-preamble-only } }
      }
  }
\tl_new:N \l__zrefcheck_msglevel_tl
\keys_define:nn { zref-check }
  {
    msglevel .choice: ,
    msglevel / warn .code:n =
      { \tl_set:Nn \l__zrefcheck_msglevel_tl { warning } } ,
    msglevel / info .code:n =
      { \tl_set:Nn \l__zrefcheck_msglevel_tl { info } } ,
    msglevel / none .code:n =
      { \tl_set:Nn \l__zrefcheck_msglevel_tl { none } } ,
    msglevel / infoifdraft .code:n =
      {
        \ifdraft
          { \tl_set:Nn \l__zrefcheck_msglevel_tl { info } }
          { \tl_set:Nn \l__zrefcheck_msglevel_tl { warning } }
      } ,
    msglevel / warniffinal .code:n =
      {
        \ifoptionfinal
          { \tl_set:Nn \l__zrefcheck_msglevel_tl { warning } }
          { \tl_set:Nn \l__zrefcheck_msglevel_tl { info } }
      } ,
    msglevel .value_required:n = true ,
    msglevel .initial:n = warn ,
    ignore .code:n =
      { \msg_warning:nnn { zref-check } { ignore-ok-document-only } { ignore } } ,
    ignore .value_forbidden:n = true ,
    ok .code:n =
      { \msg_warning:nnn { zref-check } { ignore-ok-document-only } { ok } } ,
    ok .value_forbidden:n = true ,
  }
\AddToHook { begindocument }
  {
    \keys_define:nn { zref-check }
      {
        ignore .meta:n = { msglevel = none } ,
        ok .meta:n = { msglevel = none } ,
      }
  }
\bool_new:N \l__zrefcheck_msgonpage_bool
\keys_define:nn { zref-check }
  {
    onpage .choice: ,
    onpage / labelseq .code:n =
      {
        \bool_set_false:N \l__zrefcheck_msgonpage_bool
      } ,
    onpage / msg .code:n =
      {
        \bool_set_true:N \l__zrefcheck_msgonpage_bool
      } ,
    onpage / labelseqifdraft .code:n =
      {
        \ifdraft
          { \bool_set_false:N \l__zrefcheck_msgonpage_bool }
          { \bool_set_true:N \l__zrefcheck_msgonpage_bool }
      } ,
    onpage / msgiffinal .code:n =
      {
        \ifoptionfinal
          { \bool_set_true:N \l__zrefcheck_msgonpage_bool }
          { \bool_set_false:N \l__zrefcheck_msgonpage_bool }
      } ,
    onpage .value_required:n = true ,
    onpage .initial:n = labelseq
  }
\int_new:N \l__zrefcheck_close_range_int
\keys_define:nn { zref-check }
  {
    closerange .code:n =
      {
        \__zrefcheck_is_integer_rgx:nTF {#1}
          { \int_set:Nn \l__zrefcheck_close_range_int { \int_eval:n {#1} } }
          {
            \msg_warning:nn { zref-check } { closerange-not-positive-integer }
            \int_set:Nn \l__zrefcheck_close_range_int { 5 }
          }
      } ,
    closerange .value_required:n = true ,
    closerange .initial:n = 5
  }
\bool_lazy_and:nnT
  { \tl_if_exist_p:c { opt@ zref-check.sty } }
  { ! \tl_if_empty_p:c { opt@ zref-check.sty } }
  { \msg_warning:nn { zref-check } { load-time-options } }
\NewDocumentCommand \zrefchecksetup { m }
  { \keys_set:nn { zref-check } {#1} }
\prop_new:N \g__zrefcheck_auxfile_lblseq_prop
\tl_gset:Nn \g__zrefcheck_tmpa_tl { \c_sys_jobname_str .aux }
\file_if_exist:nT { \g__zrefcheck_tmpa_tl }
  {
    \ior_open:Nn \g__zrefcheck_tmpa_ior { \g__zrefcheck_tmpa_tl }
    \group_begin:
    \int_zero:N \l__zrefcheck_tmpa_int
    \tl_clear:N \l__zrefcheck_tmpa_tl
    \tl_clear:N \l__zrefcheck_tmpb_tl
    \bool_set_false:N \l__zrefcheck_tmpa_bool
    \ior_map_variable:NNn \g__zrefcheck_tmpa_ior \l__zrefcheck_tmpa_tl
      {
        \tl_map_variable:NNn \l__zrefcheck_tmpa_tl \l__zrefcheck_tmpb_tl
          {
            \tl_if_eq:NnTF \l__zrefcheck_tmpb_tl { \zref@newlabel }
              {
                \bool_set_true:N \l__zrefcheck_tmpa_bool
              }
              {
                \bool_if:NTF \l__zrefcheck_tmpa_bool
                  {
                    \bool_set_false:N \l__zrefcheck_tmpa_bool
                    \int_incr:N \l__zrefcheck_tmpa_int
                    \prop_gput:Nee \g__zrefcheck_auxfile_lblseq_prop
                      { \l__zrefcheck_tmpb_tl }
                      { \int_use:N \l__zrefcheck_tmpa_int }
                  }
                  {
                    \tl_map_break:
                  }
              }
          }
      }
    \group_end:
    \ior_close:N \g__zrefcheck_tmpa_ior
  }
\begingroup
  \let \@addtoreset \ltx@gobbletwo
  \newcounter { zrefcheck }
\endgroup
\setcounter { zrefcheck } { 0 }
\cs_new:Npn \__zrefcheck_check_lblfmt:n #1 { zrefcheck@ \int_use:N #1 }
\cs_new:Npn \__zrefcheck_end_lblfmt:n #1 { #1 @zrefcheck }
\cs_new_protected:Npn \zrefcheck_get_astl:nnn #1#2#3
  {
    \tl_clear:N #3
    \tl_if_eq:nnTF {#2} { lblseq }
      {
        \prop_get:NnNF \g__zrefcheck_auxfile_lblseq_prop {#1} #3
          {
            \msg_warning:nnnn { zref-check }
              { property-not-in-label } {#1} {#2}
          }
      }
      {
        \zref@ifrefundefined {#1}
          {}
          {
            \zref@ifpropundefined {#2}
              { \msg_warning:nnnn { zref-check } { property-undefined } {#2} }
              {
                \zref@ifrefcontainsprop {#1} {#2}
                  {
                    \tl_set:Ne #3
                      { \zref@extractdefault {#1} {#2} { \c_empty_tl } }
                  }
                  {
                    \msg_warning:nnnn
                      { zref-check } { property-not-in-label } {#1} {#2}
                  }
              }
          }
      }
  }
\bool_new:N \l__zrefcheck_integer_bool
\tl_new:N \l__zrefcheck_propval_tl
\cs_new_protected:Npn \zrefcheck_get_asint:nnn #1#2#3
  {
    \zrefcheck_get_astl:nnn {#1} {#2} { \l__zrefcheck_propval_tl }
    \__zrefcheck_is_integer:nTF { \l__zrefcheck_propval_tl }
      {
        \int_set:Nn #3 { \int_eval:n { \l__zrefcheck_propval_tl } }
      }
      {
        \bool_set_false:N \l__zrefcheck_integer_bool
        \zref@ifrefundefined {#1}
          { }
          {
            \msg_warning:nnnn { zref-check }
              { property-not-integer } {#2} {#1}
          }
      }
  }
\NewDocumentCommand \zcheck { s O { } m m }
  { \zref@wrapper@babel \__zrefcheck_zcheck:nnnn {#3} {#1} {#2} {#4} }
\seq_new:N \l__zrefcheck_zcheck_labels_seq
\int_new:N \g__zrefcheck_id_int
\tl_new:N \l__zrefcheck_checkbeg_tl
\tl_new:N \l__zrefcheck_link_label_tl
\tl_new:N \l__zrefcheck_link_anchor_tl
\bool_new:N \l__zrefcheck_link_star_bool
\cs_new_protected:Npn \__zrefcheck_zcheck:nnnn #1#2#3#4
  {
    \group_begin:
    \keys_set:nn { zref-check / zcheck } {#3}
    \seq_set_split:Nnn \l__zrefcheck_zcheck_labels_seq { , } {#1}
    \int_gincr:N \g__zrefcheck_id_int
    \tl_set:Ne \l__zrefcheck_checkbeg_tl
      { \__zrefcheck_check_lblfmt:n { \g__zrefcheck_id_int } }
    \zref@labelbylist { \l__zrefcheck_checkbeg_tl } { zrefcheck-check }
    \seq_get:NN \l__zrefcheck_zcheck_labels_seq \l__zrefcheck_link_label_tl
    \bool_set:Nn \l__zrefcheck_link_star_bool {#2}
    \zref@ifrefundefined { \l__zrefcheck_link_label_tl }
      {#4}
      {
        \bool_if:nTF
          {
            \l__zrefcheck_use_hyperref_bool &&
            ! \l__zrefcheck_link_star_bool
          }
          {
            \exp_args:Ne \zrefcheck_get_astl:nnn
              { \l__zrefcheck_link_label_tl }
              { anchor } { \l__zrefcheck_link_anchor_tl }
            \hyperlink { \l__zrefcheck_link_anchor_tl } {#4}
          }
          {#4}
      }
    \bool_if:NT \l__zrefcheck_zcheck_end_label_bool
      {
        \zref@labelbylist
          { \__zrefcheck_end_lblfmt:n { \l__zrefcheck_checkbeg_tl } }
          { zrefcheck-end }
      }
    \seq_map_inline:Nn \l__zrefcheck_zcheck_labels_seq
      { \tl_if_empty:nF {##1} { \zref@refused {##1} } }
    \__zrefcheck_run_checks:nne { \l__zrefcheck_zcheck_checks_seq }
      { \l__zrefcheck_zcheck_labels_seq } { \l__zrefcheck_checkbeg_tl }
    \group_end:
  }
\NewDocumentCommand \zctarget { m +m }
  {
    \group_begin:
    \refstepcounter { zrefcheck }
    \zref@wrapper@babel \zref@label {#1}
    #2
    \tl_if_empty:nF {#2}
      {
        \zref@wrapper@babel
          \zref@labelbylist { \__zrefcheck_end_lblfmt:n {#1} } { zrefcheck-end }
      }
    \group_end:
  }
\NewDocumentEnvironment {zcregion} { m }
  {
    \refstepcounter { zrefcheck }
    \zref@wrapper@babel \zref@label {#1}
  }
  {
    \zref@wrapper@babel
      \zref@labelbylist { \__zrefcheck_end_lblfmt:n {#1} } { zrefcheck-end }
  }
\seq_const_from_clist:Nn \c__zrefcheck_single_label_checks_seq
  {
    thischap ,
    prevchap ,
    nextchap ,
    chapsbefore ,
    chapsafter ,
    thissec ,
    prevsec ,
    nextsec ,
    secsbefore ,
    secsafter ,
    manual ,
  }
\seq_new:N \l__zrefcheck_zcheck_checks_seq
\bool_new:N \l__zrefcheck_zcheck_end_label_bool
\keys_define:nn { } { zref-check / zcheck .inherit:n = zref-check }
\clist_map_inline:nn
  {
    thispage ,
    prevpage ,
    nextpage ,
    facing ,
    otherpage ,
    pagegap ,
    above ,
    below ,
    pagesbefore ,
    ppbefore ,
    pagesafter ,
    ppafter ,
    before ,
    after ,
    thischap ,
    prevchap ,
    nextchap ,
    chapsbefore ,
    chapsafter ,
    thissec ,
    prevsec ,
    nextsec ,
    secsbefore ,
    secsafter ,
    close ,
    far ,
    manual ,
  }
  {
    \keys_define:nn { zref-check / zcheck }
      {
        #1 .code:n =
          {
            \seq_put_right:Nn \l__zrefcheck_zcheck_checks_seq {#1}
            \seq_if_in:NnF \c__zrefcheck_single_label_checks_seq {#1}
              { \bool_set_true:N \l__zrefcheck_zcheck_end_label_bool }
          } ,
        #1 .value_forbidden:n = true ,
     }
  }
\cs_new_protected:Npn \__zrefcheck_run_checks:nnn #1#2#3
  {
    \group_begin:
    \seq_map_inline:Nn #2
      {
        \seq_if_empty:NTF #1
          { \__zrefcheck_message:nnnn { no-checks } { } { } { } }
          {
            \seq_map_inline:Nn #1
              { \__zrefcheck_do_check:nnn {####1} {##1} {#3} }
          }
      }
    \group_end:
  }
\cs_generate_variant:Nn \__zrefcheck_run_checks:nnn { nne }
\bool_new:N \l__zrefcheck_passedcheck_bool
\bool_new:N \l__zrefcheck_onpage_bool
\bool_new:N \l__zrefcheck_empty_label_bool
\seq_const_from_clist:Nn \c__zrefcheck_onpage_checks_seq
  { above , below , before , after }
\cs_generate_variant:Nn \exp_args:Nnno { Nnoo }
\cs_new_protected:Npn \__zrefcheck_do_check:nnn #1#2#3
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_passedcheck_bool
    \bool_set_false:N \l__zrefcheck_onpage_bool
    \bool_set_false:N \l__zrefcheck_empty_label_bool
    \cs_if_exist:cTF { __zrefcheck_check_ #1 :nnF }
      {
        \zref@ifrefundefined {#2}
          {
            \tl_if_empty:nT {#2}
              {
                \bool_set_false:N \l__zrefcheck_passedcheck_bool
                \bool_set_true:N \l__zrefcheck_empty_label_bool
              }
          }
          {
            % ``label beg'' vs ``reference beg''.
            \use:c { __zrefcheck_check_ #1 :nnF }
              {#2} {#3}
              { \bool_set_false:N \l__zrefcheck_passedcheck_bool }
            % ``reference end'' \emph{may} exist or not depending on the
            % checks.
            \zref@ifrefundefined { \__zrefcheck_end_lblfmt:n {#3} }
              {
                % ``label end'' \emph{may} have been created by the
                % target commands.
                \zref@ifrefundefined { \__zrefcheck_end_lblfmt:n {#2} }
                  {}
                  {
                    % ``label end'' vs ``reference beg''.
                    \exp_args:Nno \use:c { __zrefcheck_check_ #1 :nnF }
                      { \__zrefcheck_end_lblfmt:n {#2} } {#3}
                      { \bool_set_false:N \l__zrefcheck_passedcheck_bool }
                  }
              }
              {
                % ``label beg'' vs ``reference end''.
                \exp_args:Nnno \use:c { __zrefcheck_check_ #1 :nnF }
                  {#2} { \__zrefcheck_end_lblfmt:n {#3} }
                  { \bool_set_false:N \l__zrefcheck_passedcheck_bool }
                % ``label end'' \emph{may} have been created by the
                % target commands.
                \zref@ifrefundefined { \__zrefcheck_end_lblfmt:n {#2} }
                  {}
                  {
                    % ``label end'' vs ``reference beg''.
                    \exp_args:Nno \use:c { __zrefcheck_check_ #1 :nnF }
                      { \__zrefcheck_end_lblfmt:n {#2} } {#3}
                      { \bool_set_false:N \l__zrefcheck_passedcheck_bool }
                    % ``label end'' vs ``reference end''.
                    \exp_args:Nnoo \use:c { __zrefcheck_check_ #1 :nnF }
                      { \__zrefcheck_end_lblfmt:n {#2} }
                      { \__zrefcheck_end_lblfmt:n {#3} }
                      { \bool_set_false:N \l__zrefcheck_passedcheck_bool }
                  }
              }
            \seq_if_in:NnT \c__zrefcheck_onpage_checks_seq {#1}
              {
                \__zrefcheck_check_thispage:nnT
                  {#2} {#3}
                  { \bool_set_true:N \l__zrefcheck_onpage_bool }
                \zref@ifrefundefined { \__zrefcheck_end_lblfmt:n {#3} }
                  {
                    \zref@ifrefundefined { \__zrefcheck_end_lblfmt:n {#2} }
                      {}
                      {
                        \__zrefcheck_check_thispage:nnT
                          { \__zrefcheck_end_lblfmt:n {#2} } {#3}
                          { \bool_set_true:N \l__zrefcheck_onpage_bool }
                      }
                  }
                  {
                    \__zrefcheck_check_thispage:nnT
                      {#2} { \__zrefcheck_end_lblfmt:n {#3} }
                      { \bool_set_true:N \l__zrefcheck_onpage_bool }
                    \zref@ifrefundefined { \__zrefcheck_end_lblfmt:n {#2} }
                      {}
                      {
                        \__zrefcheck_check_thispage:nnT
                          { \__zrefcheck_end_lblfmt:n {#2} } {#3}
                          { \bool_set_true:N \l__zrefcheck_onpage_bool }
                        \__zrefcheck_check_thispage:nnT
                          { \__zrefcheck_end_lblfmt:n {#2} }
                          { \__zrefcheck_end_lblfmt:n {#3} }
                          { \bool_set_true:N \l__zrefcheck_onpage_bool }
                      }
                  }
              }
          }
      }
      { \msg_warning:nnn { zref-check } { check-missing } {#1} }
    \bool_if:NTF \l__zrefcheck_passedcheck_bool
      {
        \bool_if:nT
          {
            \l__zrefcheck_msgonpage_bool &&
            \l__zrefcheck_onpage_bool
          }
          {
            \__zrefcheck_message:nnne { double-check } {#1} {#2}
              { \zref@extractdefault {#3} {page} {'unknown'} }
          }
      }
      {
        \bool_if:NTF \l__zrefcheck_empty_label_bool
          { \__zrefcheck_message:nnnn { empty-label } {#1} { } { } }
          {
            \__zrefcheck_message:nnne { check-failed } {#1} {#2}
              { \zref@extractdefault {#3} {page} {'unknown'} }
          }
      }
    \group_end:
  }
\cs_generate_variant:Nn \__zrefcheck_do_check:nnn { nnV }
\int_new:N \l__zrefcheck_lbl_int
\int_new:N \l__zrefcheck_ref_int
\int_new:N \l__zrefcheck_lbl_b_int
\int_new:N \l__zrefcheck_ref_b_int
\prg_new_protected_conditional:Npnn \__zrefcheck_check_thispage:nn #1#2 { T , F , TF }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { abspage } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { abspage } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_otherpage:nn #1#2 { T , F , TF }
  {
    \__zrefcheck_check_thispage:nnTF {#1} {#2}
      { \prg_return_false: }
      { \prg_return_true:  }
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_above:nn #1#2 { F , TF }
  {
    \group_begin:
    \__zrefcheck_check_thispage:nnTF {#1} {#2}
      {
        \bool_set_true:N \l__zrefcheck_integer_bool
        \zrefcheck_get_asint:nnn {#1} { lblseq } { \l__zrefcheck_lbl_int }
        \zrefcheck_get_asint:nnn {#2} { lblseq } { \l__zrefcheck_ref_int }
        \bool_lazy_and:nnTF
          { \l__zrefcheck_integer_bool }
          {
            \int_compare_p:nNn
              { \l__zrefcheck_lbl_int } < { \l__zrefcheck_ref_int } &&
            ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
            ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
          }
          { \group_insert_after:N \prg_return_true:  }
          { \group_insert_after:N \prg_return_false: }
      }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_below:nn #1#2 { F , TF }
  {
    \__zrefcheck_check_thispage:nnTF {#1} {#2}
      {
        \__zrefcheck_check_above:nnTF {#1} {#2}
          { \prg_return_false: }
          { \prg_return_true:  }
      }
      { \prg_return_false: }
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_before:nn #1#2 { F }
  {
    \__zrefcheck_check_pagesbefore:nnTF {#1} {#2}
      { \prg_return_true: }
      {
        \__zrefcheck_check_above:nnTF {#1} {#2}
          { \prg_return_true:  }
          { \prg_return_false: }
      }
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_after:nn #1#2 { F }
  {
    \__zrefcheck_check_pagesafter:nnTF {#1} {#2}
      { \prg_return_true: }
      {
        \__zrefcheck_check_below:nnTF {#1} {#2}
          { \prg_return_true:  }
          { \prg_return_false: }
      }
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_nextpage:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { abspage } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { abspage } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int + 1 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_prevpage:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { abspage } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { abspage } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int - 1 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_pagesbefore:nn #1#2 { F , TF }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { abspage } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { abspage } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } < { \l__zrefcheck_ref_int } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\cs_new_eq:NN \__zrefcheck_check_ppbefore:nnF \__zrefcheck_check_pagesbefore:nnF
\prg_new_protected_conditional:Npnn \__zrefcheck_check_pagesafter:nn #1#2 { F , TF }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { abspage } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { abspage } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } > { \l__zrefcheck_ref_int } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\cs_new_eq:NN \__zrefcheck_check_ppafter:nnF \__zrefcheck_check_pagesafter:nnF
\prg_new_protected_conditional:Npnn \__zrefcheck_check_pagegap:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { abspage } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { abspage } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \int_abs:n { \l__zrefcheck_lbl_int - \l__zrefcheck_ref_int } } > { 1 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_facing:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { abspage } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { abspage } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \legacy_if_p:n { @twoside } &&
        (
          (
            \int_if_odd_p:n { \l__zrefcheck_ref_int } &&
            \int_compare_p:nNn
              { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int - 1 }
          ) ||
          (
            \int_if_even_p:n { \l__zrefcheck_ref_int } &&
            \int_compare_p:nNn
              { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int + 1 }
          )
        ) &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_close:nn #1#2 { F , TF }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { abspage } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { abspage } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \int_abs:n { \l__zrefcheck_lbl_int - \l__zrefcheck_ref_int } }
          <
          { \l__zrefcheck_close_range_int + 1 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_far:nn #1#2 { F }
  {
    \__zrefcheck_check_close:nnTF {#1} {#2}
      { \prg_return_false: }
      { \prg_return_true:  }
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_thischap:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { zc@abschap } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abschap } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_nextchap:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { zc@abschap } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abschap } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int + 1 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_prevchap:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { zc@abschap } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abschap } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int - 1 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_chapsafter:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { zc@abschap } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abschap } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } > { \l__zrefcheck_ref_int } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_chapsbefore:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { zc@abschap } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abschap } { \l__zrefcheck_ref_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } < { \l__zrefcheck_ref_int } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_thissec:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { zc@abssec  } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abssec  } { \l__zrefcheck_ref_int }
    \zrefcheck_get_asint:nnn {#1} { zc@abschap } { \l__zrefcheck_lbl_b_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abschap } { \l__zrefcheck_ref_b_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_b_int } = { \l__zrefcheck_ref_b_int } &&
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_nextsec:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { zc@abssec  } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abssec  } { \l__zrefcheck_ref_int }
    \zrefcheck_get_asint:nnn {#1} { zc@abschap } { \l__zrefcheck_lbl_b_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abschap } { \l__zrefcheck_ref_b_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_b_int } = { \l__zrefcheck_ref_b_int } &&
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int + 1 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_prevsec:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { zc@abssec  } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abssec  } { \l__zrefcheck_ref_int }
    \zrefcheck_get_asint:nnn {#1} { zc@abschap } { \l__zrefcheck_lbl_b_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abschap } { \l__zrefcheck_ref_b_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_b_int } = { \l__zrefcheck_ref_b_int } &&
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } = { \l__zrefcheck_ref_int - 1 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_secsafter:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { zc@abssec  } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abssec  } { \l__zrefcheck_ref_int }
    \zrefcheck_get_asint:nnn {#1} { zc@abschap } { \l__zrefcheck_lbl_b_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abschap } { \l__zrefcheck_ref_b_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_b_int } = { \l__zrefcheck_ref_b_int } &&
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } > { \l__zrefcheck_ref_int } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_secsbefore:nn #1#2 { F }
  {
    \group_begin:
    \bool_set_true:N \l__zrefcheck_integer_bool
    \zrefcheck_get_asint:nnn {#1} { zc@abssec  } { \l__zrefcheck_lbl_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abssec  } { \l__zrefcheck_ref_int }
    \zrefcheck_get_asint:nnn {#1} { zc@abschap } { \l__zrefcheck_lbl_b_int }
    \zrefcheck_get_asint:nnn {#2} { zc@abschap } { \l__zrefcheck_ref_b_int }
    \bool_lazy_and:nnTF
      { \l__zrefcheck_integer_bool }
      {
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_b_int } = { \l__zrefcheck_ref_b_int } &&
        \int_compare_p:nNn
          { \l__zrefcheck_lbl_int } < { \l__zrefcheck_ref_int } &&
        ! \int_compare_p:nNn { \l__zrefcheck_lbl_int } = { 0 } &&
        ! \int_compare_p:nNn { \l__zrefcheck_ref_int } = { 0 }
      }
      { \group_insert_after:N \prg_return_true:  }
      { \group_insert_after:N \prg_return_false: }
    \group_end:
  }
\prg_new_protected_conditional:Npnn \__zrefcheck_check_manual:nn #1#2 { F }
  { \prg_return_false: }
\cs_new_protected:Npn \zrefcheck_zcref_beg_label:
  {
    \int_gincr:N \g__zrefcheck_id_int
    \tl_set:Ne \l__zrefcheck_checkbeg_tl
      { \__zrefcheck_check_lblfmt:n { \g__zrefcheck_id_int } }
    \zref@labelbylist { \l__zrefcheck_checkbeg_tl } { zrefcheck-check }
  }
\cs_new_protected:Npn \zrefcheck_zcref_end_label_maybe:
  {
    \bool_if:NT \l__zrefcheck_zcheck_end_label_bool
      {
        \zref@labelbylist
          { \__zrefcheck_end_lblfmt:n { \l__zrefcheck_checkbeg_tl } }
          { zrefcheck-end }
      }
  }
\cs_new_protected:Npn \zrefcheck_zcref_run_checks_on_labels:n #1
  {
    \__zrefcheck_run_checks:nne
      { \l__zrefcheck_zcheck_checks_seq } {#1} { \l__zrefcheck_checkbeg_tl }
  }
\cs_new_protected:Npn \zrefcheck_zrefvario_label:
  {
    \int_gincr:N \g__zrefcheck_id_int
    \tl_set:Ne \l__zrefcheck_checkbeg_tl
      { \__zrefcheck_check_lblfmt:n { \g__zrefcheck_id_int } }
    \zref@labelbylist { \l__zrefcheck_checkbeg_tl } { zrefcheck-zrefvario }
  }
\cs_new_protected:Npn \zrefcheck_zrefvario_run_check_on_label:nn #1#2
  { \__zrefcheck_do_check:nnV {#1} {#2} \l__zrefcheck_checkbeg_tl }
\cs_generate_variant:Nn \zrefcheck_zrefvario_run_check_on_label:nn { Vn }
%% 
%%
%% End of file `zref-check.sty'.