Support ** as expand_values operator: **x == expand_values(x)

src/parser.cpp

@@ -3525,6 +3525,7 @@ gb_internal Ast *parse_unary_expr(AstFile *f, bool lhs) {
 	case Token_Xor:
 	case Token_And:
 	case Token_Not:
+	case Token_MulMul: // 'expand_values' operator
 	case Token_Mul: // Used for error handling when people do C-like things
 	{
 		Token token = advance_token(f);