From ef9306d82ce11aa72059d48c6fa776227a2e0856 Mon Sep 17 00:00:00 2001
From: Asger F <asgerf@github.com>
Date: Wed, 27 May 2026 22:18:42 +0200
Subject: [PATCH] Yeast: Allow rules that return an empty sequence

---
 shared/yeast-macros/src/parse.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/shared/yeast-macros/src/parse.rs b/shared/yeast-macros/src/parse.rs
index 608c332d47e..96e426bbf62 100644
--- a/shared/yeast-macros/src/parse.rs
+++ b/shared/yeast-macros/src/parse.rs
@@ -475,6 +475,11 @@ fn parse_direct_list(tokens: &mut Tokens, ctx: &Ident) -> Result<Vec<TokenStream
             let group = expect_group(tokens, Delimiter::Parenthesis)?;
             let mut inner = group.stream().into_iter().peekable();
 
+            // Empty `()` represents an empty sequence — emit nothing.
+            if inner.peek().is_none() {
+                continue;
+            }
+
             // Regular node
             let node = parse_direct_node_inner(&mut inner, ctx)?;
             items.push(quote! { __nodes.push(#node); });