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