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 // <ostream> 11 12 // template <class charT, class traits = char_traits<charT> > 13 // class basic_ostream; 14 15 // operator<<(short n); 16 // operator<<(unsigned short n); 17 // operator<<(int n); 18 // operator<<(unsigned int n); 19 // operator<<(long n); 20 // operator<<(unsigned long n); 21 // operator<<(long long n); 22 // operator<<(unsigned long long n); 23 24 // Testing to make sure that the max length values are correctly inserted when 25 // using std::showbase 26 27 #include <cassert> 28 #include <cstdint> 29 #include <ios> 30 #include <limits> 31 #include <sstream> 32 #include <type_traits> 33 34 template <typename T> 35 static void test(std::ios_base::fmtflags fmt, const char *expected) 36 { 37 std::stringstream ss; 38 ss.setf(fmt, std::ios_base::basefield); 39 ss << std::showbase << (std::is_signed<T>::value ? std::numeric_limits<T>::min() : std::numeric_limits<T>::max()); 40 assert(ss.str() == expected); 41 } 42 43 int main(void) 44 { 45 const std::ios_base::fmtflags o = std::ios_base::oct; 46 const std::ios_base::fmtflags d = std::ios_base::dec; 47 const std::ios_base::fmtflags x = std::ios_base::hex; 48 49 test<short>(o, "0100000"); 50 test<short>(d, "-32768"); 51 test<short>(x, "0x8000"); 52 53 test<unsigned short>(o, "0177777"); 54 test<unsigned short>(d, "65535"); 55 test<unsigned short>(x, "0xffff"); 56 57 test<int>(o, "020000000000"); 58 test<int>(d, "-2147483648"); 59 test<int>(x, "0x80000000"); 60 61 test<unsigned int>(o, "037777777777"); 62 test<unsigned int>(d, "4294967295"); 63 test<unsigned int>(x, "0xffffffff"); 64 65 const bool long_is_32 = std::integral_constant<bool, sizeof(long) == sizeof(int32_t)>::value; // avoid compiler warnings 66 const bool long_is_64 = std::integral_constant<bool, sizeof(long) == sizeof(int64_t)>::value; // avoid compiler warnings 67 const bool long_long_is_64 = std::integral_constant<bool, sizeof(long long) == sizeof(int64_t)>::value; // avoid compiler warnings 68 69 if (long_is_32) { 70 test<long>(o, "020000000000"); 71 test<long>(d, "-2147483648"); 72 test<long>(x, "0x80000000"); 73 74 test<unsigned long>(o, "037777777777"); 75 test<unsigned long>(d, "4294967295"); 76 test<unsigned long>(x, "0xffffffff"); 77 } else if (long_is_64) { 78 test<long>(o, "01000000000000000000000"); 79 test<long>(d, "-9223372036854775808"); 80 test<long>(x, "0x8000000000000000"); 81 82 test<unsigned long>(o, "01777777777777777777777"); 83 test<unsigned long>(d, "18446744073709551615"); 84 test<unsigned long>(x, "0xffffffffffffffff"); 85 } 86 if (long_long_is_64) { 87 test<long long>(o, "01000000000000000000000"); 88 test<long long>(d, "-9223372036854775808"); 89 test<long long>(x, "0x8000000000000000"); 90 91 test<unsigned long long>(o, "01777777777777777777777"); 92 test<unsigned long long>(d, "18446744073709551615"); 93 test<unsigned long long>(x, "0xffffffffffffffff"); 94 } 95 96 return 0; 97 } 98
