Add expressions in parenthesis

examples/test.lua

@@ -90,6 +90,6 @@ function ipairs(t)
     end, "otus", "potus"
 end
 
-for k, v in ipairs(table) do
+for k, v in (ipairs(table)) do
     print(k, v)
 end

src/ast.rs

@@ -689,6 +689,11 @@ impl Parse for PrimaryExpression {
             Expression::TableConstructor(entries)
         } else if let Ok(_) = stream.parse::<Ellipsis>() {
             Expression::Ellipsis
+        } else if let Some(Token::Symbol('(')) = stream.peek() {
+            stream.next();
+            let expression = stream.parse()?;
+            stream.expect_symbol(')')?;
+            expression
         } else {
             Expression::ValueRef(stream.parse()?)
         };