libcxx/test/language.support/support.limits/limits/numeric.limits.members/max_digits10.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// test numeric_limits

// max_digits10

#include <limits>
#include <cfloat>

template <class T, int expected>
void
test()
{
    static_assert(std::numeric_limits<T>::max_digits10 == expected, "max_digits10 test 1");
    static_assert(std::numeric_limits<const T>::max_digits10 == expected, "max_digits10 test 2");
    static_assert(std::numeric_limits<volatile T>::max_digits10 == expected, "max_digits10 test 3");
    static_assert(std::numeric_limits<const volatile T>::max_digits10 == expected, "max_digits10 test 4");
}

int main()
{
    test<bool, 0>();
    test<char, 0>();
    test<signed char, 0>();
    test<unsigned char, 0>();
    test<wchar_t, 0>();
#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
    test<char16_t, 0>();
    test<char32_t, 0>();
#endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
    test<short, 0>();
    test<unsigned short, 0>();
    test<int, 0>();
    test<unsigned int, 0>();
    test<long, 0>();
    test<unsigned long, 0>();
    test<long long, 0>();
    test<unsigned long long, 0>();
    test<float, 2+(FLT_MANT_DIG * 30103)/100000>();
    test<double, 2+(DBL_MANT_DIG * 30103)/100000>();
    test<long double, 2+(LDBL_MANT_DIG * 30103)/100000>();
}