Simplify

crates/syntax/src/ast/node_ext.rs

@@ -611,6 +611,12 @@ impl ast::Item {
     }
 }
 
+impl ast::Condition {
+    pub fn is_pattern_cond(&self) -> bool {
+        self.let_token().is_some()
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum FieldKind {
     Name(ast::NameRef),