feat(treesitter): add next, prev sibling method

Add tsnode methods to change to the next, previous, named or unnamed
nodes.

1 files changed, 48 insertions, 0 deletions

diff --git a/src/nvim/lua/treesitter.c b/src/nvim/lua/treesitter.c
index 1425baacf0..2dfcd9a958 100644
--- a/src/nvim/lua/treesitter.c
+++ b/src/nvim/lua/treesitter.c
@@ -80,6 +80,10 @@ static struct luaL_Reg node_meta[] = {
   { "parent", node_parent },
   { "iter_children", node_iter_children },
   { "_rawquery", node_rawquery },
+  { "next_sibling", node_next_sibling },
+  { "prev_sibling", node_prev_sibling },
+  { "next_named_sibling", node_next_named_sibling },
+  { "prev_named_sibling", node_prev_named_sibling },
   { NULL, NULL }
 };
 
@@ -992,6 +996,50 @@ static int node_parent(lua_State *L)
   return 1;
 }
 
+static int node_next_sibling(lua_State *L)
+{
+  TSNode node;
+  if (!node_check(L, 1, &node)) {
+    return 0;
+  }
+  TSNode sibling = ts_node_next_sibling(node);
+  push_node(L, sibling, 1);
+  return 1;
+}
+
+static int node_prev_sibling(lua_State *L)
+{
+  TSNode node;
+  if (!node_check(L, 1, &node)) {
+    return 0;
+  }
+  TSNode sibling = ts_node_prev_sibling(node);
+  push_node(L, sibling, 1);
+  return 1;
+}
+
+static int node_next_named_sibling(lua_State *L)
+{
+  TSNode node;
+  if (!node_check(L, 1, &node)) {
+    return 0;
+  }
+  TSNode sibling = ts_node_next_named_sibling(node);
+  push_node(L, sibling, 1);
+  return 1;
+}
+
+static int node_prev_named_sibling(lua_State *L)
+{
+  TSNode node;
+  if (!node_check(L, 1, &node)) {
+    return 0;
+  }
+  TSNode sibling = ts_node_prev_named_sibling(node);
+  push_node(L, sibling, 1);
+  return 1;
+}
+
 /// assumes the match table being on top of the stack
 static void set_match(lua_State *L, TSQueryMatch *match, int nodeidx)
 {