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 // <fstream> 11 12 // template <class charT, class traits = char_traits<charT> > 13 // class basic_filebuf 14 15 // template <class charT, class traits> 16 // void 17 // swap(basic_filebuf<charT, traits>& x, basic_filebuf<charT, traits>& y); 18 19 #include <fstream> 20 #include <cassert> 21 #include "platform_support.h" 22 23 int main() 24 { 25 std::string temp = get_temp_file_name(); 26 { 27 std::filebuf f; 28 assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in 29 | std::ios_base::trunc) != 0); 30 assert(f.is_open()); 31 assert(f.sputn("123", 3) == 3); 32 f.pubseekoff(1, std::ios_base::beg); 33 assert(f.sgetc() == '2'); 34 std::filebuf f2; 35 swap(f2, f); 36 assert(!f.is_open()); 37 assert(f2.is_open()); 38 assert(f2.sgetc() == '2'); 39 } 40 std::remove(temp.c_str()); 41 { 42 std::wfilebuf f; 43 assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in 44 | std::ios_base::trunc) != 0); 45 assert(f.is_open()); 46 assert(f.sputn(L"123", 3) == 3); 47 f.pubseekoff(1, std::ios_base::beg); 48 assert(f.sgetc() == L'2'); 49 std::wfilebuf f2; 50 swap(f2, f); 51 assert(!f.is_open()); 52 assert(f2.is_open()); 53 assert(f2.sgetc() == L'2'); 54 } 55 std::remove(temp.c_str()); 56 } 57
