1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <ios> 11 12 // class ios_base 13 14 // ios_base& hex(ios_base& str); 15 16 #include <ios> 17 #include <streambuf> 18 #include <cassert> 19 20 struct testbuf : public std::streambuf {}; 21 main()22int main() 23 { 24 testbuf sb; 25 std::ios ios(&sb); 26 std::ios_base& r = std::hex(ios); 27 assert(&r == &ios); 28 assert(ios.flags() & std::ios::hex); 29 } 30