From d1fc10fb85956c944f23628303b057a90b1a1999 Mon Sep 17 00:00:00 2001
From: Sean Li <22557931+sean0407@users.noreply.github.com>
Date: Tue, 20 Oct 2026 02:06:06 +0800
Subject: [PATCH] Fix AlwaysListMatcher behavior

---
 engine/src/list_matcher.rs |  2 +-
 engine/src/scheme.rs       | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/engine/src/list_matcher.rs b/engine/src/list_matcher.rs
index 2de813ed..dd5c263c 100644
--- a/engine/src/list_matcher.rs
+++ b/engine/src/list_matcher.rs
@@ -102,7 +102,7 @@ impl ListDefinition for AlwaysList {
 
 impl ListMatcher for AlwaysListMatcher {
     fn match_value(&self, _: &str, _: &LhsValue<'_>) -> bool {
-        false
+        true
     }
 
     fn clear(&mut self) {}
diff --git a/engine/src/scheme.rs b/engine/src/scheme.rs
index 3e6b0343..e55c0b64 100644
--- a/engine/src/scheme.rs
+++ b/engine/src/scheme.rs
@@ -2070,6 +2070,22 @@ fn test_scheme_json_rejects_invalid_identifier() {
     assert!(err.to_string().contains("invalid identifier 1invalid"));
 }
 
+#[test]
+fn test_always_list_matches() {
+    use crate::{AlwaysList, ExecutionContext};
+
+    let mut builder = Scheme! { num: Int };
+    builder.add_list(Type::Int, AlwaysList {}).unwrap();
+    let scheme = builder.build();
+
+    let filter = scheme.parse("num in $numbers").unwrap().compile();
+    let mut ctx = ExecutionContext::new(&scheme);
+    ctx.set_field_value(scheme.get_field("num").unwrap(), 42)
+        .unwrap();
+
+    assert_eq!(filter.execute(&ctx), Ok(true));
+}
+
 #[test]
 fn test_nil_not_equal_behavior_true() {
     use crate::{Array, ExecutionContext, Map};