numeric_limits.h

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#pragma once
 
template <typename T>
struct NumericLimits;
 
template <>
struct NumericLimits<float>
{
    static constexpr float max() noexcept { return __FLT_MAX__; }
    static constexpr float lowest() noexcept { return -__FLT_MAX__; }
    static constexpr float infinity() noexcept { return __builtin_huge_valf(); }
};
 
template <>
struct NumericLimits<double>
{
    static constexpr double max() noexcept { return __DBL_MAX__; }
    static constexpr double lowest() noexcept { return -__DBL_MAX__; }
    static constexpr double infinity() noexcept { return __builtin_huge_val(); }
};
 
template <>
struct NumericLimits<int>
{
    static constexpr int max() noexcept { return __INT_MAX__; }
    static constexpr int lowest() noexcept { return -__INT_MAX__ - 1; }
};
 
template <>
struct NumericLimits<long>
{
    static constexpr long max() noexcept { return __LONG_MAX__; }
    static constexpr long lowest() noexcept { return -__LONG_MAX__ - 1L; }
};
 
template <>
struct NumericLimits<unsigned int>
{
    static constexpr unsigned int max() noexcept { return __INT_MAX__ * 2U + 1U; }
    static constexpr unsigned int lowest() noexcept { return 0; }
};