From b934e14708dde33b5024d5ee90d2cc5b91d6b742 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20Ke=C3=9Fler?= <git@maximilian-kessler.de>
Date: Fri, 21 Jan 2022 14:05:29 +0100
Subject: [PATCH] introduce clist to save parents for group

---
 doc/environments/groupthm/groupthm.dtx | 13 ++++++++++++-
 doc/environments/groupthm/groupthm.sty |  2 ++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/doc/environments/groupthm/groupthm.dtx b/doc/environments/groupthm/groupthm.dtx
index ced8cfd..8f53e02 100644
--- a/doc/environments/groupthm/groupthm.dtx
+++ b/doc/environments/groupthm/groupthm.dtx
@@ -1415,7 +1415,13 @@
 %    \begin{macrocode}
     \@@_add_to_group_ordering:n { #1 }
 %    \end{macrocode}
-%
+% \begin{variable}{ \g_@@_parents_group__\meta{theorem group}__clist }
+%     
+% This variable will accumulate the parents of this group:
+%    \begin{macrocode}
+    \clist_new:c { g_@@_parents_group__#1__clist }
+%    \end{macrocode}
+% \end{variable}
 % Add defined group to corresponding list 
 %
 %    \begin{macrocode}
@@ -1459,6 +1465,11 @@
 %    \begin{macrocode}
     \clist_gremove_all:Nn  \g_@@_defined_groups_clist { #1 }
 %    \end{macrocode}
+%  
+%   Delete the known parents of this group:
+%    \begin{macrocode}
+    \cs_undefine:c { g_@@_parents_group__#1__clist }
+%    \end{macrocode}
 %
 % Now, unset all relations with all defined theorem groups in the internal hooks.
 %
diff --git a/doc/environments/groupthm/groupthm.sty b/doc/environments/groupthm/groupthm.sty
index 324416f..349a4af 100644
--- a/doc/environments/groupthm/groupthm.sty
+++ b/doc/environments/groupthm/groupthm.sty
@@ -183,6 +183,7 @@
         }
     }
     \__groupthm_add_to_group_ordering:n { #1 }
+    \clist_new:c { g__groupthm_parents_group__#1__clist }
     \clist_gput_left:Nn \g__groupthm_defined_groups_clist { #1 }
   }
 \cs_new:Npn \__groupthm_undefine_group:n #1
@@ -194,6 +195,7 @@
     \hook_gremove_code:nn { __groupthm/mapname  } { #1 }
     \hook_gremove_code:nn { __groupthm/thmtools } { #1 }
     \clist_gremove_all:Nn  \g__groupthm_defined_groups_clist { #1 }
+    \cs_undefine:c { g__groupthm_parents_group__#1__clist }
     \__groupthm_hook_gset_rule_foreach:nNnn
       { ?? }
       \g__groupthm_defined_groups_clist