1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include <iostream>
10 #include <cassert>
11 
12 #include "test_macros.h"
13 
14 // Test to make sure that the streams only get initialized once
15 // Taken from https://llvm.org/PR43300
16 
17 // This test requires the fix for PR43300 (7b81a13bfcd1).
18 // XFAIL: using-built-library-before-llvm-9
19 
main(int,char **)20 int main(int, char**)
21 {
22 
23     std::cout << "Hello!";
24     std::ios_base::fmtflags stock_flags = std::cout.flags();
25 
26     std::cout << std::boolalpha << true;
27     std::ios_base::fmtflags ba_flags = std::cout.flags();
28     assert(stock_flags != ba_flags);
29 
30     std::ios_base::Init init_streams;
31     std::ios_base::fmtflags after_init = std::cout.flags();
32     assert(after_init == ba_flags);
33 
34     return 0;
35 }
36