Forum Message Rules for Stuff That Looks Like Code

When is the following error generated when replying to a message in a thread:

"Please surround your source code with code tags."

I had code tags around what I consider is code. But the message in question was not passing the automatic checks.

Yep. I don't know exactly what the rules are, but at a guess, I'd say it's pretty simple: curly braces indicate code.

Code:

---

{} <--- requires code tags

---