Update TUPLE_EXPR grammar

crates/ra_syntax/src/ast/generated.rs

@@ -2969,7 +2969,11 @@ fn to_owned(&self) -> TreeArc<TupleExpr> { TreeArc::cast(self.syntax.to_owned())
 }
 
 
-impl TupleExpr {}
+impl TupleExpr {
+    pub fn exprs(&self) -> impl Iterator<Item = &Expr> {
+        super::children(self)
+    }
+}
 
 // TuplePat
 #[derive(Debug, PartialEq, Eq, Hash)]

crates/ra_syntax/src/grammar.ron

@@ -357,7 +357,9 @@ Grammar(
             enum: ["FnDef", "TypeDef", "ConstDef"]
         ),
 
-        "TupleExpr": (),
+        "TupleExpr": (
+            collections: [["exprs", "Expr"]]
+        ),
         "ArrayExpr": (),
         "ParenExpr": (options: ["Expr"]),
         "PathExpr": (options: ["Path"]),