我正在测试cleveref-usedon显示方程的能力。以下是我的测试文档：
\documentclass{article}
\usepackage{mathtools}
\usepackage{amsthm}
\newtheorem{theorem}{Theorem}
\newtheorem{lemma}{Lemma}
\usepackage[UsedByAndOn]{cleveref-usedon}
\usepackage{todonotes}
\SetUsedByAndOnText{Referenced by #1 on #2.}
\SetUsedByAndOnMessage
{%
\todo[%
inline,
size=\scriptsize,
color=blue!40,
backgroundcolor=white,
textcolor=darkgray,
bordercolor=darkgray,
prepend]{%
\textup{\UsedByAndOnText{#1}{#2}}%
}%
}
\SetUsedByAndOnMessageOutsideMath
{%
\todo[%
inline,
size=\scriptsize,
color=blue!40,
backgroundcolor=white,
textcolor=blue!50!cyan,
bordercolor=blue!50!cyan,
prepend]{%
\textup{\UsedByAndOnText{#1}{#2}}%
}%
}
\begin{document}
\begin{theorem}\label{thm}
\cref{eq},
\cref{multline:test}
\end{theorem}
\begin{lemma}
\cref{thm}, \cref{eq}
\cref{multline:test}
\end{lemma}
\begin{equation}
\label{eq}
\int x
\end{equation}
\begin{multline}\label{multline:test}
1+1+1+1+1+1+1+1+1+1+1+1+1+1+1\\
+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1
\end{multline}
\end{document}
因为equation我得到了正确的输出（蓝色框）：
我也尝试了dmath“breqn”、、align和flalign，这些功能全部或至少部分起作用，但什么也没发生。请问为什么 的行为不同，有什么方法可以解决这个问题吗alignat？gathermultlinemultline
下面是我修改的版本cleveref-usedon，使其适用于（编号）显示的方程式。
下面的代码与已经发布的代码略有修改这个 GitHub 问题，我正在尝试将其扩展以用于其他类型的显示方程。
\def\UsedOnPackageVersion{0.4.0x}
\def\UsedOnPackageDate{2023-10-19}
\NeedsTeXFormat{LaTeX2e}[2021-06-01]
\ProvidesExplPackage{cleveref-usedon}
{\UsedOnPackageDate}
{\UsedOnPackageVersion}
{Patches the cleveref package and adds forward-referencing functionality}
%%
\providecommand\IfFormatAtLeastTF{\@ifl@t@r\fmtversion}
\IfFormatAtLeastTF{2021-06-01}{%
% LaTeX2e version new enough
}{%
\PackageError{cleveref-usedon}{%
Mismatched~LaTeX~support~files~detected.\MessageBreak
Your~LaTeX~format~is~dated~\fmtversion,\MessageBreak
but~the~package~cleveref-usedon\MessageBreak
requires~at~least~2021-06-01.\MessageBreak
Update~your~TeX~distribution.\MessageBreak
\MessageBreak
Loading~cleveref-usedon~will~abort!}%
{Update~your~TeX~distribution~using~your~TeX~package~manager.}%
}
\providecommand\IfExplAtLeastTF{\@ifl@t@r\ExplLoaderFileDate}
\RequirePackage{expl3}[2021-05-16]
\IfExplAtLeastTF{2021-05-16}{%
% expl3 version new enough
}{%
\PackageError{cleveref-usedon}{%
Support~package~expl3~too~old.\MessageBreak
The~L3~programming~layer~in~the~LaTeX~format\MessageBreak
is~dated~\ExplLoaderFileDate,\MessageBreak
but~the~package~cleveref-usedon\MessageBreak
requires~at~least~2021-05-16.\MessageBreak
Update~your~TeX~distribution.\MessageBreak
\MessageBreak
Loading~cleveref-usedon~will~abort!}%
{Update~your~TeX~distribution~using~your~TeX~package~manager.}%
}
\keys_define:nn { cleveref-usedon }
{
, Default .tl_set:N = \l__UsedOn_default_tl
, Default .initial:n = { }
, Default .value_required:n = true
, UsedOn .meta:n = { Default = UsedOn }
, usedon .meta:n = { Default = UsedOn }
, uo .meta:n = { Default = UsedOn }
, UsedBy .meta:n = { Default = UsedBy }
, usedby .meta:n = { Default = UsedBy }
, ub .meta:n = { Default = UsedBy }
, UsedByAndOn .meta:n = { Default = UsedByAndOn }
, usedbyandon .meta:n = { Default = UsedByAndOn }
, ubao .meta:n = { Default = UsedByAndOn }
, unknown .code:n =
{ \PassOptionsToPackage { \CurrentOption } { cleveref } }
}
\ProcessKeyOptions [ cleveref-usedon ]
\RequirePackage{cleveref}[2018/03/27]
\newcommand*{\@setcpagerefrange}[3]{%
\@@setcpagerefrange{#1}{#2}{cref}{#3}}
\newcommand*{\@setCpagerefrange}[3]{%
\@@setcpagerefrange{#1}{#2}{Cref}{#3}}
\newcommand*{\@setlabelcpagerefrange}[3]{%
\@@setcpagerefrange{#1}{#2}{labelcref}{#3}}
\prg_generate_conditional_variant:Nnn \str_case:nn { x } { T, TF }
\cs_generate_variant:Nn \str_case:nn { x }
\seq_new:N \g__UsedOn_k_seq
\prop_new:N \g__UsedOn_kv_prop
\clist_new:N \g__UsedOn_Options_clist
\clist_set:Nn \g__UsedOn_Options_clist { UsedOn, UsedBy, UsedByAndOn }
\cs_new:Nn \__UsedOn_UsedOnMessage:n { }
\cs_new:Nn \__UsedOn_UsedByMessage:n { }
\cs_new:Nn \__UsedOn_UsedByAndOnMessage:nn { }
\NewDocumentCommand \UsedOnText { m } { \__UsedOn_UsedOnMessage:n { #1 } }
\NewDocumentCommand \UsedByText { m } { \__UsedOn_UsedByMessage:n { #1 } }
\NewDocumentCommand \UsedByAndOnText { m m } { \__UsedOn_UsedByAndOnMessage:nn { #1 } { #2 } }
\NewDocumentCommand \SetUsedOnText { m }
{
\cs_set:Nn \__UsedOn_UsedOnMessage:n { #1 }
}
\NewDocumentCommand \SetUsedByText { m }
{
\cs_set:Nn \__UsedOn_UsedByMessage:n { #1 }
}
\NewDocumentCommand \SetUsedByAndOnText { m }
{
\cs_set:Nn \__UsedOn_UsedByAndOnMessage:nn { #1 }
}
\RequirePackage{iflang}
\SetUsedOnText
{
\IfLanguageName{english}
{ (Used~on~#1.) } {}
\IfLanguageName{french}
{ (Apparaît~en~#1.) } {}
\IfLanguageName{ngerman}
{ (Wird~auf~#1.) } {}
\IfLanguageName{spanish}
{ (Aparece~en~#1.) } {}
}
\SetUsedByText
{
\IfLanguageName{english}
{ (Used~by~#1.) } {}
\IfLanguageName{french}
{ (Apparaît~dans~#1.) } {}
\IfLanguageName{ngerman}
{ (Wird~in~#1.) } {}
\IfLanguageName{spanish}
{ (Aparece~en~#1.) } {}
}
\SetUsedByAndOnText
{
\IfLanguageName{english}
{ (Used~by~#1~on~#2.) } {}
\IfLanguageName{french}
{ (Apparaît~dans~#1~en~#2.) } {}
\IfLanguageName{ngerman}
{ (Wird~in~#1~auf~#2.) } {}
\IfLanguageName{spanish}
{ (Aparece~en~#1~en~#2.) } {}
}
\NewDocumentCommand \UsedOnMessage { m }
{
\emph{ \__UsedOn_UsedOnMessage:n { #1 } } \\[.3\baselineskip]
}
\NewDocumentCommand \UsedByMessage { m }
{
\emph{ \__UsedOn_UsedByMessage:n { #1 } } \\[.3\baselineskip]
}
\NewDocumentCommand \UsedByAndOnMessage { m m }
{
\emph{ \__UsedOn_UsedByAndOnMessage:nn { #1 } { #2 } } \\[.3\baselineskip]
}
\def\UsedOnMessageMath{}
\def\UsedByMessageMath{}
\def\UsedByAndOnMessageMath{}
\NewDocumentCommand \UsedOnMessageInsideMath { m }
{
% By default does nothing
}
\NewDocumentCommand \UsedByMessageInsideMath { m }
{
% By default does nothing
}
\NewDocumentCommand \UsedByAndOnMessageInsideMath { m m }
{
% By default does nothing
}
\NewDocumentCommand \UsedOnMessageOutsideMath { m }
{
% By default does nothing
}
\NewDocumentCommand \UsedByMessageOutsideMath { m }
{
% By default does nothing
}
\NewDocumentCommand \UsedByAndOnMessageOutsideMath { m m }
{
% By default does nothing
}
\tl_new:N \g__UsedOn_tmpa_tl
\NewDocumentCommand \SetUsedOnMessage { m }
{
\RenewDocumentCommand \UsedOnMessage { m } { #1 }
}
\NewDocumentCommand \SetUsedByMessage { m }
{
\RenewDocumentCommand \UsedByMessage { m } { #1 }
}
\NewDocumentCommand \SetUsedByAndOnMessage { m }
{
\RenewDocumentCommand \UsedByAndOnMessage { m m } { #1 }
}
\bool_new:N \g__UsedOn_inside_math_bool
\NewDocumentCommand \SetUsedOnMessageInsideMath { m }
{
\bool_set_true:N \g__UsedOn_inside_math_bool
\RenewDocumentCommand \UsedOnMessageInsideMath { m } { #1 }
}
\NewDocumentCommand \SetUsedByMessageInsideMath { m }
{
\bool_set_true:N \g__UsedOn_inside_math_bool
\RenewDocumentCommand \UsedByMessageInsideMath { m } { #1 }
}
\NewDocumentCommand \SetUsedByAndOnMessageInsideMath { m }
{
\bool_set_true:N \g__UsedOn_inside_math_bool
\RenewDocumentCommand \UsedByAndOnMessageInsideMath { m m } { #1 }
}
\clist_new:N \l__UsedOn_supported_equation_env_clist
\clist_set:Nn \l__UsedOn_supported_equation_env_clist
{
equation,
align, flalign, alignat,
gather,
multline,
dmath,
}
\cs_new:Nn \__UsedOn_message_outsidemath_hook_gremove_code:nn
{
\clist_map_inline:Nn \l__UsedOn_supported_equation_env_clist
{
\hook_gremove_code:nn { env/##1/#1 } { cleveref-usedon- #2 -message-outsidemath }
}
}
\cs_new:Nn \__UsedOn_message_outsidemath_hook_gput_code:nnn
{
\clist_map_inline:Nn \l__UsedOn_supported_equation_env_clist
{
\hook_gput_code:nnn { env/##1/#1 } { cleveref-usedon- #2 -message-outsidemath } { #3 }
}
}
\cs_new:Nn \__UsedOn_message_outsidemath_hook_gset_rule:nnnn
{
\clist_map_inline:Nn \l__UsedOn_supported_equation_env_clist
{
\hook_gset_rule:nnnn { env/##1/#1 } { cleveref-usedon- #2 -message-outsidemath } { #3 } { cleveref-usedon- #4 -message-outsidemath }
}
}
\__UsedOn_message_outsidemath_hook_gput_code:nnn { before } { UsedOn } { }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { before } { UsedBy } { }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { before } { UsedByAndOn } { }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { after } { UsedOn } { }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { after } { UsedBy } { }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { after } { UsedByAndOn } { }
\cs_new:Nn \__UsedOnMessageOutsideMath:n {}
\NewDocumentCommand \SetUsedOnMessageOutsideMath { m }
{
\bool_set_false:N \g__UsedOn_inside_math_bool
\RenewDocumentCommand \UsedOnMessageOutsideMath { m }
{
\__UsedOn_message_outsidemath_hook_gset_rule:nnnn { after } { UsedOn } { voids } { UsedBy }
\__UsedOn_message_outsidemath_hook_gset_rule:nnnn { after } { UsedOn } { voids } { UsedByAndOn }
\tl_gset:Ne \g__UsedOn_tmpa_tl { ##1 }
}
\cs_set:Nn \__UsedOnMessageOutsideMath:n
{
\bool_if:NF \g__UsedOn_no_use_bool
{
\tl_if_empty:NF \g__UsedOn_tmpa_tl
{
#1
}
}
}
\__UsedOn_message_outsidemath_hook_gremove_code:nn { before } { UsedOn }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { before } { UsedOn }
{
\tl_gclear:N \g__UsedOn_tmpa_tl
}
\__UsedOn_message_outsidemath_hook_gremove_code:nn { after } { UsedOn }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { after } { UsedOn }
{
\__UsedOnMessageOutsideMath:n { \tl_use:N \g__UsedOn_tmpa_tl }
}
}
\cs_new:Nn \__UsedByMessageOutsideMath:n {}
\NewDocumentCommand \SetUsedByMessageOutsideMath { m }
{
\bool_set_false:N \g__UsedOn_inside_math_bool
\RenewDocumentCommand \UsedByMessageOutsideMath { m }
{
\__UsedOn_message_outsidemath_hook_gset_rule:nnnn { after } { UsedBy } { voids } { UsedOn }
\__UsedOn_message_outsidemath_hook_gset_rule:nnnn { after } { UsedBy } { voids } { UsedByAndOn }
\tl_gset:Ne \g__UsedOn_tmpa_tl { ##1 }
}
\cs_set:Nn \__UsedByMessageOutsideMath:n
{
\bool_if:NF \g__UsedOn_no_use_bool
{
\tl_if_empty:NF \g__UsedOn_tmpa_tl
{
#1
}
}
}
\__UsedOn_message_outsidemath_hook_gremove_code:nn { before } { UsedBy }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { before } { UsedBy }
{
\tl_gclear:N \g__UsedOn_tmpa_tl
}
\__UsedOn_message_outsidemath_hook_gremove_code:nn { after } { UsedBy }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { after } { UsedBy }
{
\__UsedByMessageOutsideMath:n { \tl_use:N \g__UsedOn_tmpa_tl }
}
}
\cs_new:Nn \__UsedByAndOnMessageOutsideMath:nn {}
\NewDocumentCommand \SetUsedByAndOnMessageOutsideMath { m }
{
\bool_set_false:N \g__UsedOn_inside_math_bool
\RenewDocumentCommand \UsedByAndOnMessageOutsideMath { m m }
{
\__UsedOn_message_outsidemath_hook_gset_rule:nnnn { after } { UsedByAndOn } { voids } { UsedOn }
\__UsedOn_message_outsidemath_hook_gset_rule:nnnn { after } { UsedByAndOn } { voids } { UsedBy }
\tl_gset:Ne \g__UsedOn_tmpa_tl { ##1 }
\tl_gset:Ne \g__UsedOn_tmpb_tl { ##2 }
}
\cs_set:Nn \__UsedByAndOnMessageOutsideMath:nn
{
\bool_if:NF \g__UsedOn_no_use_bool
{
\tl_if_empty:NF \g__UsedOn_tmpa_tl
{
#1
}
}
}
\__UsedOn_message_outsidemath_hook_gremove_code:nn { before } { UsedByAndOn }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { before } { UsedByAndOn }
{
\tl_gclear:N \g__UsedOn_tmpa_tl
\tl_gclear:N \g__UsedOn_tmpb_tl
}
\__UsedOn_message_outsidemath_hook_gremove_code:nn { after } { UsedByAndOn }
\__UsedOn_message_outsidemath_hook_gput_code:nnn { after } { UsedByAndOn }
{
\__UsedByAndOnMessageOutsideMath:nn { \tl_use:N \g__UsedOn_tmpa_tl } { \tl_use:N \g__UsedOn_tmpb_tl }
}
}
\cs_new:Nn \__UsedOn_Printer_generic:nnn
{
%% % Check if the reference #1@<LabelName>@1 exists
%% % Here the @1 means that <LabelName> has been referenced
%% % with option #1 at least once where #1 is
%% % 'UsedOn', 'UsedBy' or 'UsedByAndOn'
\cs_if_exist:cT {r@#1@#2@1}
{
%% % In a tmp clist we store all the references of the form
%% % `<Option>@<LabelName>@<Number>`
%% % where Number between 1 and \value{LastRun@UsedOn@<LabelName>}
%% % if the latter exists, otherwise until 1
%% % Should/will normally need two consecutive runs of pdflatex
\cs_if_free:cTF {c@LastRun@#1@#2}
{ \int_set:Nn \l_tmpa_int { 1 } }
{ \int_set:Nn \l_tmpa_int { \value{LastRun@#1@#2} } }
\int_set:Nn \l_tmpb_int { 1 }
\int_while_do:nn { \l_tmpb_int <= \l_tmpa_int }
{
\clist_put_right:Nx \l_tmpa_clist { #1@#2@\int_use:N \l_tmpb_int }
\int_incr:N \l_tmpb_int
}
#3
}
}
\NewDocumentCommand \__UsedOn_Printer { m m }
{
\__UsedOn_Printer_generic:nnn { #1 } { #2 }
{
%% % Print `UsedOn` message by calling \cpageref with the parameter clist above
%% % Uncomment the next two lines for debugging to see the contents of \l_tmpa_clist
%% %% Arguments~of~cpageref/cref~are:
%% %% \par\clist_use:Nn \l_tmpa_clist {\par}\par
\str_case:xn { \str_foldcase:n { #1 } }
{
{usedon}
{ \UsedOnMessage { \cpageref{\l_tmpa_clist} } }
{usedby}
{ \UsedByMessage { \cref{\l_tmpa_clist} } }
{usedbyandon}
{ \UsedByAndOnMessage { \cref{\l_tmpa_clist} } { \cpageref{\l_tmpa_clist} } }
}
}
}
\NewDocumentCommand \__UsedOn_Printer_Math { m m }
{
\__UsedOn_Printer_generic:nnn { #1 } { #2 }
{
%% % Print `UsedOn` message by calling \cpageref with the parameter clist above
%% % Uncomment the next two lines for debugging to see the contents of \l_tmpa_clist
%% %% Arguments~of~cpageref/cref~are:
%% %% \par\clist_use:Nn \l_tmpa_clist {\par}\par
\bool_if:NTF \g__UsedOn_inside_math_bool
{
\RenewCommandCopy \UsedOnMessageMath \UsedOnMessageInsideMath
\RenewCommandCopy \UsedByMessageMath \UsedByMessageInsideMath
\RenewCommandCopy \UsedByAndOnMessageMath \UsedByAndOnMessageInsideMath
}
{
\RenewCommandCopy \UsedOnMessageMath \UsedOnMessageOutsideMath
\RenewCommandCopy \UsedByMessageMath \UsedByMessageOutsideMath
\RenewCommandCopy \UsedByAndOnMessageMath \UsedByAndOnMessageOutsideMath
}
\str_case:xn { \str_foldcase:n { #1 } }
{
{usedon}
{ \UsedOnMessageMath { \exp_not:V \cpageref{\l_tmpa_clist} } }
{usedby}
{ \UsedByMessageMath { \cref{\l_tmpa_clist} } }
{usedbyandon}
{ \UsedByAndOnMessageMath { \cref{\l_tmpa_clist} } { \exp_not:V \cpageref{\l_tmpa_clist} } }
}
}
}
\NewDocumentCommand \__UsedOn_PrintMessage { m }
{
\clist_map_inline:Nn \g__UsedOn_Options_clist
{
\__UsedOn_Printer{##1}{#1}
}
}
\NewDocumentCommand \__UsedOn_PrintMessageMath { m }
{
\clist_map_inline:Nn \g__UsedOn_Options_clist
{
\__UsedOn_Printer_Math{##1}{#1}
}
}
\str_new:N \l__UsedOn_Option_str
\NewDocumentCommand \__UsedOn_Processor { o m }
{
\IfValueT{#1}{
\str_case:xnTF { \str_foldcase:n { #1 } }
{
%% % check if options 'UsedOn', 'UsedBy' or 'UsedByAndOn'
%% % (case-insensitive) were used in one of the following forms
{usedon} {\str_set:Nn \l__UsedOn_Option_str {UsedOn}}
{uo} {\str_set:Nn \l__UsedOn_Option_str {UsedOn}}
{usedby} {\str_set:Nn \l__UsedOn_Option_str {UsedBy}}
{ub} {\str_set:Nn \l__UsedOn_Option_str {UsedBy}}
{usedbyandon} {\str_set:Nn \l__UsedOn_Option_str {UsedByAndOn}}
{ubao} {\str_set:Nn \l__UsedOn_Option_str {UsedByAndOn}}
}
{
{
%% % Loop through (potential) label list in arg of \cref (or \Cref)
\seq_set_from_clist:Nn \l_tmpa_seq {#2}
\seq_map_inline:Nn \l_tmpa_seq
{
%% % if the label has not been referenced yet,
%% % create a counter for the current and last run and save the label in the
%% % global container \g_@@_k_seq
\seq_if_in:NxF \g__UsedOn_k_seq { \l__UsedOn_Option_str @##1 }
{
\newcounter{ ThisRun@ \l__UsedOn_Option_str @##1 }
\cs_if_free:cT {c@LastRun@ \l__UsedOn_Option_str @##1}
{
\newcounter{LastRun@ \l__UsedOn_Option_str @##1}
}
\seq_gput_right:Nx \g__UsedOn_k_seq
{ \l__UsedOn_Option_str @##1}
}
%% % increase the counters and compare with max counter
\stepcounter{ThisRun@ \l__UsedOn_Option_str @##1}
\setcounter{LastRun@ \l__UsedOn_Option_str @##1}
{
\fp_eval:n
{
max(
\value{ThisRun@ \l__UsedOn_Option_str @##1} ,
\value{LastRun@ \l__UsedOn_Option_str @##1}
)
}
}
%% % store the value in global key-value property list
\prop_gput:Nxx \g__UsedOn_kv_prop
{ \l__UsedOn_Option_str @##1}
{\arabic{LastRun@ \l__UsedOn_Option_str @##1}}
%% % create a label for the UsedOn reference and number this label
\__UsedOn_origlabel
{
\l__UsedOn_Option_str @##1@
\arabic{ThisRun@ \l__UsedOn_Option_str @##1}
}
}
}
}
{
%% % Throw an error, if an unrecognised option was used
%% % for the optional argument to this macro.
\msg_new:nnn {cleveref-usedon} { OptionSpellingError }
{
\MessageBreak
Spelling~error~\msg_line_context:
\MessageBreak
Did~you~mean~to~pass~option\MessageBreak
'UsedOn'~to~cref~or~Cref?
}
\msg_fatal:nn { cleveref-usedon } { OptionSpellingError }
}
}
}
\bool_new:N \l__UsedOn_already_specified_bool
\clist_new:N \l__UsedOn_args_clist
\cs_new:Nn \__UsedOn_define_from_orig:NN
{
\NewDocumentCommand #1 { s o m }
{
\IfValueTF { ##2 }
{
\bool_set_false:N \l__UsedOn_already_specified_bool
\clist_set:Nn \l__UsedOn_args_clist { ##2 }
\clist_put_right:No \l__UsedOn_args_clist { \l__UsedOn_default_tl }
\clist_map_inline:Nn \l__UsedOn_args_clist
{
\str_case:xnT { \str_foldcase:n { ####1 } }
{
{usedon} {}
{uo} {}
{usedby} {}
{ub} {}
{usedbyandon} {}
{ubao} {}
}
{
\clist_remove_all:Nn \l__UsedOn_args_clist { ####1 }
\bool_if:NF \l__UsedOn_already_specified_bool
{
\__UsedOn_Processor[####1]{##3}
}
\bool_set_true:N \l__UsedOn_already_specified_bool
}
}
\clist_if_empty:NTF \l__UsedOn_args_clist
{
\IfBooleanTF{##1}{ #2*{##3} }{ #2{##3} }
}
{
\IfBooleanTF{##1}{ #2*[\l__UsedOn_args_clist]{##3} }{ #2[\l__UsedOn_args_clist]{##3} }
}
}
{
\tl_if_blank:VF \l__UsedOn_default_tl
{
\clist_clear:N \l__UsedOn_args_clist
\clist_put_right:No \l__UsedOn_args_clist { \l__UsedOn_default_tl }
\clist_map_inline:Nn \l__UsedOn_args_clist
{
\__UsedOn_Processor[####1]{##3}
}
}
\IfBooleanTF{##1}{ #2*{##3} }{ #2{##3} }
}
}
}
\__UsedOn_define_from_orig:NN \__UsedOn_cref \__UsedOn_origcref
\__UsedOn_define_from_orig:NN \__UsedOn_Cref \__UsedOn_origCref
\__UsedOn_define_from_orig:NN \__UsedOn_labelcref \__UsedOn_origlabelcref
\NewDocumentCommand \__UsedOn_ReadFromAux { }
{
\prop_map_inline:Nn \g__UsedOn_kv_prop
{
\newcounter{LastRun@##1}
\setcounter{LastRun@##1}{##2}
}
}
\NewDocumentCommand \__UsedOn_WriteToAux { }
{
%% % First, we clear the global key-value prop list \cs{g_@@_kv_prop} and
%% % then we rebuild it with the information from the current run.
\prop_clear:N \g__UsedOn_kv_prop
\seq_map_inline:Nn \g__UsedOn_k_seq
{ \prop_gput:Nxx \g__UsedOn_kv_prop {##1}{\arabic{ThisRun@##1}} }
%% % Turn on |expl3| functionality in .aux file.
\iow_now:cx { @auxout }
{ \token_to_str:N \ExplSyntaxOn }
%% % Loop through the key-val |proplist| and write contents to .aux file.
\prop_map_inline:Nn \g__UsedOn_kv_prop
{
\tl_set:Nn \l_tmpa_tl { ##1 }
\tl_replace_all:Nnn \l_tmpa_tl { ~ } { \c_tilde_str }
\iow_now:cx { @auxout }
{
\prop_gput_from_keyval:Nn \token_to_str:N \g__UsedOn_kv_prop
{ {\l_tmpa_tl} = ##2 }
}
}
%% % Turn off |expl3| functionality in .aux file.
\iow_now:cx { @auxout }
{ \token_to_str:N \ExplSyntaxOff }
}%
\hook_gput_code:nnn { begindocument/end } { cleveref-usedon }
{
\__UsedOn_ReadFromAux
\cs_if_exist:NF \label@in@display { \NewCommandCopy \label@in@display \label }
\NewCommandCopy \__UsedOn_origlabel@in@display \label@in@display
\NewCommandCopy \__UsedOn_origlabel \label
\NewCommandCopy \__UsedOn_origcref \cref
\NewCommandCopy \__UsedOn_origCref \Cref
\NewCommandCopy \__UsedOn_origlabelcref \labelcref
\bool_new:N \g__UsedOn_no_use_bool
\RenewDocumentCommand \label { o m }
{
\bool_gset_false:N \g__UsedOn_no_use_bool
\clist_clear:N \l__UsedOn_args_clist
\IfValueT { #1 }
{
\clist_set:Nn \l__UsedOn_args_clist { #1 }
}
\clist_map_inline:Nn \l__UsedOn_args_clist
{
\str_case:xnT { \str_foldcase:n { ##1 } }
{
{nouse} {}
}
{
\clist_remove_all:Nn \l__UsedOn_args_clist { ##1 }
\bool_gset_true:N \g__UsedOn_no_use_bool
}
}
\if_mode_math: % this is for environments that do not use \label@in@display
\clist_if_empty:NTF \l__UsedOn_args_clist
{
\__UsedOn_origlabel@in@display{#2}
}
{
\__UsedOn_origlabel@in@display[\l__UsedOn_args_clist]{#2}
}
\bool_if:NF \g__UsedOn_no_use_bool
{
\__UsedOn_PrintMessageMath{#2}
}
\else:
\clist_if_empty:NTF \l__UsedOn_args_clist
{
\__UsedOn_origlabel{#2}
}
{
\__UsedOn_origlabel[\l__UsedOn_args_clist]{#2}
}
\bool_if:NF \g__UsedOn_no_use_bool
{
\__UsedOn_PrintMessage{#2}
}
\fi:
}
\RenewDocumentCommand \label@in@display { o m }
{
\bool_gset_false:N \g__UsedOn_no_use_bool
\clist_clear:N \l__UsedOn_args_clist
\IfValueT { #1 }
{
\clist_set:Nn \l__UsedOn_args_clist { #1 }
}
\clist_map_inline:Nn \l__UsedOn_args_clist
{
\str_case:xnT { \str_foldcase:n { ##1 } }
{
{nouse} {}
}
{
\clist_remove_all:Nn \l__UsedOn_args_clist { ##1 }
\bool_gset_true:N \g__UsedOn_no_use_bool
}
}
\clist_if_empty:NTF \l__UsedOn_args_clist
{
\__UsedOn_origlabel@in@display{#2}
}
{
\__UsedOn_origlabel@in@display[\l__UsedOn_args_clist]{#2}
}
\bool_if:NF \g__UsedOn_no_use_bool
{
\__UsedOn_PrintMessageMath{#2}
}
}
\RenewCommandCopy \cref \__UsedOn_cref
\RenewCommandCopy \Cref \__UsedOn_Cref
\RenewCommandCopy \labelcref \__UsedOn_labelcref
}
\hook_gput_code:nnn { enddocument } { cleveref-usedon }
{
\__UsedOn_WriteToAux
}
\endinput
%%
%% End of file `cleveref-usedon.sty'.
答案1
事实证明，经过cleveref特殊处理multline。它将内部宏重新定义为：
\def\multline@#1{%
\Let@%
\@display@init{\global\advance\row@\@ne\relax\global\dspbrk@lvl\m@ne}%
\chardef\dspbrk@context\z@%
\restore@math@cr%
\let\tag\tag@in@align%
\global\tag@false \global\let\raise@tag\@empty%
\mmeasure@{#1}%
\let\tag\gobble@tag \let\label\cref@gobble@optarg% <<< cleveref modification
\tabskip \if@fleqn \@mathmargin \else \z@skip \fi%
\totwidth@\displaywidth%
\if@fleqn%
\advance\totwidth@-\@mathmargin\relax%
\fi%
\halign\bgroup%
\hbox to\totwidth@{%
\if@fleqn%
\hskip \@centering \relax%
\else%
\hfil%
\fi%
\strut@%
$\m@th\displaystyle{}##\endmultline@math%
\hfil%
}% $
\crcr%
\if@fleqn%
\hskip-\@mathmargin%
\def\multline@indent{\hskip\@mathmargin}%
\else%
\hfilneg%
\def\multline@indent{\hskip\multlinegap}%
\fi%
\iftagsleft@%
\iftag@%
\begingroup%
\ifshifttag@%
\rlap{\vbox{%
\normalbaselines%
\hbox{%
\strut@%
\make@display@tag%
}%
\vbox to\lineht@{}%
\raise@tag%
}}%
\multline@indent%
\else%
\setbox\z@\hbox{\make@display@tag}%
\dimen@\@mathmargin \advance\dimen@-\wd\z@\relax%
\ifdim\dimen@<\multlinetaggap%
\dimen@\multlinetaggap%
\fi%
\box\z@ \hskip\dimen@\relax%
\fi%
\endgroup%
\else%
\multline@indent%
\fi%
\else%
\multline@indent%
\fi%
#1%
}%
为了使代码正常工作，必须修补此修改后的行，例如通过：
% \RequirePackage{regexpatch}
\xpatchcmd{\multline@}{\let\label\cref@gobble@optarg}{\let\label\label@gobble}{}{}
其中的定义与中的\label@gobble修改类似，只是没有应用原始的标签命令。\labelcleveref-usedon