coccinelle: fine-tuning for commit.cocci?

Hello,

I would like to comment implementation details from the commit 301b8c7f405d3cd4f32b14bd336ac8c0400d9382 ("commit.c: add repo_get_commit_tree()").

1. Would you like to use a code variant (for the semantic patch language)
   which can work without a regular expression for the exclusion of a single item?

   identifier f != set_commit_tree;

2. How do you think about the following variants for the specification of SmPL constraints?

   * Advanced regular expression

     identifier f !~ "^(?:get_commit_tree_in_graph_one|load_tree_for_commit|(?:repo_g|s)et_commit_tree)$";

   * Item list filter

     identifier f != { get_commit_tree_in_graph_one, load_tree_for_commit, repo_get_commit_tree, set_commit_tree };

Regards, Markus