implement astgen union + enum & update behavior tests

[Rexicon226]

i believe this finishes up #17916.

might have missed some cases, please let me know!

[Rexicon226]

@mlugg sorry to bother :D whenever you have a chance to review

[Rexicon226]

will merge the latest changes from master to re-run the ci, maybe itll fix the flaky test 🤔

[matu3ba]

will merge the latest changes from master to re-run the ci, maybe itll fix the flaky test 🤔

Try

diff --git a/lib/std/net/test.zig b/lib/std/net/test.zig
index caac8f4e6..69f40aba9 100644
--- a/lib/std/net/test.zig
+++ b/lib/std/net/test.zig
@@ -356,6 +356,7 @@ test "non-blocking tcp server" {
     defer socket_file.close();
 
     var client = try server.accept();
+    defer client.stream.close();
     const stream = client.stream.writer();
     try stream.print("hello from server\n", .{});

[Rexicon226]

saw the discussion earlier about this 😃

the ci has already passed when i rebased so it wouldn't make much sense now, but i hope it helps in the future.

[andrewrk]

Needs a rebase and then another review from @mlugg

[Rexicon226]

Needs a rebase and then another review from @mlugg

Can do right now!

[mlugg]

Nice work, thanks!