gcc/testsuite/g++.dg/modules/pr99283-7_c.C

// { dg-additional-options "-std=c++2a -fmodules-ts" }
import  "pr99283-7_b.H";

#include "pr99283-7-swap.h"

import  "pr99283-7_a.H";

void Xlocale(const string& __s);