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-rw-r--r--Master/texmf-dist/source/latex/l3kernel/l3sys.dtx24
1 files changed, 23 insertions, 1 deletions
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3sys.dtx b/Master/texmf-dist/source/latex/l3kernel/l3sys.dtx
index 5ff23b47750..5717e60e731 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3sys.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3sys.dtx
@@ -43,7 +43,7 @@
% }^^A
% }
%
-% \date{Released 2023-08-11}
+% \date{Released 2023-08-29}
%
% \maketitle
%
@@ -79,6 +79,11 @@
% \end{texnote}
% \end{variable}
%
+% \begin{variable}[added = 2023-08-27]{\c_sys_timestamp_str}
+% The timestamp for the current job: the format is as described for
+% \cs{file_timestamp:n}.
+% \end{variable}
+%
% \section{Engine}
%
% \begin{function}[added = 2015-09-07, EXP, pTF]
@@ -928,6 +933,23 @@ end
% \end{macrocode}
% \end{variable}
%
+% \begin{variable}{\c_sys_timestamp_str}
+% A simple expansion: Lua\TeX{} chokes if we use \tn{pdffeedback} here,
+% hence the direct use of Lua. Notice that the function there is in the
+% \texttt{pdf} library but isn actually tied to PDF.
+% \begin{macrocode}
+\@@_everyjob:n
+ {
+ \str_const:Nx \c_sys_timestamp_str
+ {
+ \cs_if_exist:NTF \tex_directlua:D
+ { \tex_directlua:D { tex.print(pdf.getcreationdate()) } }
+ { \tex_creationdate:D }
+ }
+ }
+% \end{macrocode}
+% \end{variable}
+%
% \subsubsection{Random numbers}
%
% \begin{macro}[EXP]{\sys_rand_seed:}