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 // <streambuf> 10 11 // template <class charT, class traits = char_traits<charT> > 12 // class basic_streambuf; 13 14 // void pbump(int n); 15 // 16 // REQUIRES: long_tests 17 18 // Unsupported for no-exceptions builds because they have no way to report an 19 // allocation failure when attempting to allocate the 2GiB string. 20 // UNSUPPORTED: no-exceptions 21 22 #include <sstream> 23 #include <cassert> 24 #include "test_macros.h" 25 26 struct SB : std::stringbuf 27 { SBSB28 SB() : std::stringbuf(std::ios::ate|std::ios::out) { } pubpbaseSB29 const char* pubpbase() const { return pbase(); } pubpptrSB30 const char* pubpptr() const { return pptr(); } 31 }; 32 main(int,char **)33int main(int, char**) 34 { 35 try { 36 std::string str(2147483648, 'a'); 37 SB sb; 38 sb.str(str); 39 assert(sb.pubpbase() <= sb.pubpptr()); 40 } 41 catch (const std::length_error &) {} // maybe the string can't take 2GB 42 catch (const std::bad_alloc &) {} // maybe we don't have enough RAM 43 44 return 0; 45 } 46