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      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 // REQUIRES: locale.en_US.UTF-8
     11 
     12 // <streambuf>
     13 
     14 // template <class charT, class traits = char_traits<charT> >
     15 // class basic_streambuf;
     16 
     17 // void swap(basic_streambuf& rhs);
     18 
     19 #include <streambuf>
     20 #include <cassert>
     21 
     22 #include "platform_support.h" // locale name macros
     23 
     24 template <class CharT>
     25 struct test
     26     : public std::basic_streambuf<CharT>
     27 {
     28     typedef std::basic_streambuf<CharT> base;
     29     test() {}
     30 
     31     void swap(test& t)
     32     {
     33         test old_this(*this);
     34         test old_that(t);
     35         base::swap(t);
     36         assert(this->eback() == old_that.eback());
     37         assert(this->gptr()  == old_that.gptr());
     38         assert(this->egptr() == old_that.egptr());
     39         assert(this->pbase() == old_that.pbase());
     40         assert(this->pptr()  == old_that.pptr());
     41         assert(this->epptr() == old_that.epptr());
     42         assert(this->getloc() == old_that.getloc());
     43 
     44         assert(t.eback() == old_this.eback());
     45         assert(t.gptr()  == old_this.gptr());
     46         assert(t.egptr() == old_this.egptr());
     47         assert(t.pbase() == old_this.pbase());
     48         assert(t.pptr()  == old_this.pptr());
     49         assert(t.epptr() == old_this.epptr());
     50         assert(t.getloc() == old_this.getloc());
     51     }
     52 
     53     void setg(CharT* gbeg, CharT* gnext, CharT* gend)
     54     {
     55         base::setg(gbeg, gnext, gend);
     56     }
     57     void setp(CharT* pbeg, CharT* pend)
     58     {
     59         base::setp(pbeg, pend);
     60     }
     61 };
     62 
     63 int main()
     64 {
     65     {
     66         test<char> t;
     67         test<char> t2;
     68         t2.swap(t);
     69     }
     70     {
     71         test<wchar_t> t;
     72         test<wchar_t> t2;
     73         t2.swap(t);
     74     }
     75     {
     76         char g1, g2, g3, p1, p3;
     77         test<char> t;
     78         t.setg(&g1, &g2, &g3);
     79         t.setp(&p1, &p3);
     80         test<char> t2;
     81         t2.swap(t);
     82     }
     83     {
     84         wchar_t g1, g2, g3, p1, p3;
     85         test<wchar_t> t;
     86         t.setg(&g1, &g2, &g3);
     87         t.setp(&p1, &p3);
     88         test<wchar_t> t2;
     89         t2.swap(t);
     90     }
     91     std::locale::global(std::locale(LOCALE_en_US_UTF_8));
     92     {
     93         test<char> t;
     94         test<char> t2;
     95         t2.swap(t);
     96     }
     97     {
     98         test<wchar_t> t;
     99         test<wchar_t> t2;
    100         t2.swap(t);
    101     }
    102 }
    103