Remove parent-node field from tree-sitter parsers

* src/treesit.c (make_treesit_parser): Remove field.
(Ftreesit_parser_parent_node):
(Ftreesit_parser_set_parent_node): Remove
* src/treesit.h (Lisp_TS_Parser): Remove field.

2 files changed, 0 insertions, 46 deletions

diff --git a/src/treesit.c b/src/treesit.c
index 9622addd09b..b0979397d35 100644
--- a/src/treesit.c
+++ b/src/treesit.c
@@ -1368,7 +1368,6 @@ make_treesit_parser (Lisp_Object buffer, TSParser *parser,
   lisp_parser->tag = tag;
   lisp_parser->last_set_ranges = Qnil;
   lisp_parser->embed_level = Qnil;
-  lisp_parser->parent_node = Qnil;
   lisp_parser->buffer = buffer;
   lisp_parser->parser = parser;
   lisp_parser->tree = tree;
@@ -1856,35 +1855,6 @@ tree; otherwise it must be a non-negative integer.  */)
   return level;
 }
 
-DEFUN ("treesit-parser-parent-node",
-       Ftreesit_parser_parent_node, Streesit_parser_parent_node,
-       1, 1, 0,
-       doc: /* Return PARSER's parent node, if one exists.
-
-Only embeded local parsers can have parent node.  When Emacs uses a node
-in the host parser to create this local parser, that node is considered
-the parent node of the local parser.  */)
-  (Lisp_Object parser)
-{
-  treesit_check_parser (parser);
-  return XTS_PARSER (parser)->parent_node;
-}
-
-DEFUN ("treesit-parser-set-parent-node",
-       Ftreesit_parser_set_parent_node, Streesit_parser_set_parent_node,
-       2, 2, 0,
-       doc: /* Make NODE be the parent node of PARSER.  */)
-  (Lisp_Object parser, Lisp_Object node)
-{
-  treesit_check_parser (parser);
-  if (!NILP (node))
-    CHECK_TS_NODE (node);
-
-  XTS_PARSER (parser)->parent_node = node;
-  return node;
-}
-
-
 /* Return true if PARSER is not deleted and its buffer is live.  */
 static bool
 treesit_parser_live_p (Lisp_Object parser)
@@ -4642,8 +4612,6 @@ applies to LANGUAGE-A will be redirected to LANGUAGE-B instead.  */);
   defsubr (&Streesit_parser_tag);
   defsubr (&Streesit_parser_embed_level);
   defsubr (&Streesit_parser_set_embed_level);
-  defsubr (&Streesit_parser_parent_node);
-  defsubr (&Streesit_parser_set_parent_node);
 
   defsubr (&Streesit_parser_root_node);
   defsubr (&Streesit_parse_string);
diff --git a/src/treesit.h b/src/treesit.h
index d4cfc47ee5d..0d4635f4253 100644
--- a/src/treesit.h
+++ b/src/treesit.h
@@ -72,20 +72,6 @@ struct Lisp_TS_Parser
      friends) haven't touched this parser yet, and this parser isn't
      part of the embed parser tree.  */
   Lisp_Object embed_level;
-  /* Some comments: Technically you could calculate embed_level by
-     following parent_node, but parent_node might be outdated so it's a
-     good idea to record embed_level separately.  Embed_level and
-     parent_node could have been implemented as "parser properties" with
-     an obarray, but ultimately I think two explicit fields helps
-     documentation better and it's not clear to me that a property list
-     for a parser will be useful beyond this.  And we can always convert
-     these to properties later, but not vice versa.  */
-  /* When an embedded parser is created, it's usually based on a node in
-     the host parser.  This field saves that node so it's possible to
-     climb up and out of the embedded parser into the host parser.  Note
-     that the range of the embedded parser doesn't have to match that of
-     the parent node.  */
-  Lisp_Object parent_node;
   /* The buffer associated with this parser.  */
   Lisp_Object buffer;
   /* The pointer to the tree-sitter parser.  Never NULL.  */