[latex3-commits] [git/LaTeX3-latex3-latex2e] gh356: Copy the change for gh/356 in ltfiles.dtx over to ltfilehook.dtx fofr gh/121 (b663ee4d)

[Johannes Braams]

Repository : https://github.com/latex3/latex2e
On branch  : gh356
Link       : https://github.com/latex3/latex2e/commit/b663ee4dd1fd5b56df907e549b3598cb17fbab9a

>---------------------------------------------------------------

commit b663ee4dd1fd5b56df907e549b3598cb17fbab9a
Author: Johannes Braams <texniek at braams.xs4all.nl>
Date:   Fri Jul 17 00:00:27 2020 +0200

    Copy the change for gh/356 in ltfiles.dtx over to ltfilehook.dtx fofr gh/121


>---------------------------------------------------------------

b663ee4dd1fd5b56df907e549b3598cb17fbab9a
 base/ltfilehook.dtx | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/base/ltfilehook.dtx b/base/ltfilehook.dtx
index 33776a2f..427614c4 100644
--- a/base/ltfilehook.dtx
+++ b/base/ltfilehook.dtx
@@ -17,7 +17,7 @@
 % for those people who are interested or want to report an issue.
 %
 %    \begin{macrocode}
-\providecommand\ltfilehookversion{v0.6f}
+\providecommand\ltfilehookversion{v0.6g}
 \providecommand\ltfilehookdate{2020/07/16}
 %    \end{macrocode}
 %
@@ -544,15 +544,22 @@
 %   Now we just hook into \cs{set at curr@file} to add
 %   \cs{@filehook at set@curr at file} at the end, after \cs{@curr at file} is
 %   set.
+% \changes{0.69}{2020-70-16}}{When the argument is empty return an
+%    empty macro instead of \texttt{csnameendcsname} (gh.121)}
 %    \begin{macrocode}
 \def\set at curr@file#1{%
   \begingroup
-    \escapechar\m at ne
-    \xdef\@curr at file{%
-      \expandafter\expandafter\expandafter\unquote at name
-      \expandafter\expandafter\expandafter{%
-      \expandafter\string
+    \def\reserved at a{#1}%
+    \ifx\reserved at a\@empty
+      \xdef\@curr at file{}%
+    \else
+      \escapechar\m at ne
+      \xdef\@curr at file{%
+        \expandafter\expandafter\expandafter\unquote at name
+        \expandafter\expandafter\expandafter{%
+        \expandafter\string
         \csname\@firstofone#1\@empty\endcsname}}%
+    \fi
   \endgroup
   \@filehook at set@curr at file{\@curr at file}%
 }