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 // <iomanip> 10 11 // T5 setprecision(int n); 12 13 #include <iomanip> 14 #include <istream> 15 #include <ostream> 16 #include <cassert> 17 18 #include "test_macros.h" 19 20 template <class CharT> 21 struct testbuf 22 : public std::basic_streambuf<CharT> 23 { testbuftestbuf24 testbuf() {} 25 }; 26 main(int,char **)27int main(int, char**) 28 { 29 { 30 testbuf<char> sb; 31 std::istream is(&sb); 32 is >> std::setprecision(10); 33 assert(is.precision() == 10); 34 } 35 { 36 testbuf<char> sb; 37 std::ostream os(&sb); 38 os << std::setprecision(10); 39 assert(os.precision() == 10); 40 } 41 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 42 { 43 testbuf<wchar_t> sb; 44 std::wistream is(&sb); 45 is >> std::setprecision(10); 46 assert(is.precision() == 10); 47 } 48 { 49 testbuf<wchar_t> sb; 50 std::wostream os(&sb); 51 os << std::setprecision(10); 52 assert(os.precision() == 10); 53 } 54 #endif 55 56 return 0; 57 } 58