chore: Don't generate compare expressions for lists when fuzzing (#3882)

Signed-off-by: Robert Kruszewski <[email protected]>

Author: robert3005

vortex-dtype/src/dtype.rs

@@ -284,6 +284,11 @@ impl DType {
         matches!(self, Struct(_, _))
     }
 
+    /// Check if `self` is a `ListDType`
+    pub fn is_list(&self) -> bool {
+        matches!(self, List(_, _))
+    }
+
     /// Check if `self` is a primitive tpye
     pub fn is_primitive(&self) -> bool {
         matches!(self, Primitive(_, _))

vortex-expr/src/arbitrary.rs

@@ -37,7 +37,7 @@ pub fn filter_expr(u: &mut Unstructured<'_>, dtype: &DType) -> AResult<Option<Ex
         .filter_map(|_| {
             match u.choose_iter(struct_dtype.names().iter().zip(struct_dtype.fields())) {
                 Ok((col, dtype)) => {
-                    if dtype.is_struct() {
+                    if dtype.is_struct() || dtype.is_list() {
                         None
                     } else {
                         Some(random_comparison(u, col, &dtype))