std::numeri...::is_iec559(3)

💖 NAME 💖

Okay so this is the std::numeri...::is_iec559(3) page from the C++ Standard Libary manual, bestie. The NAME is literally std::numeric_limits::is_iec559 - std::numeric_limits::is_iec559. Yes, both sides. Iconic. ✨

🌸 Synopsis 🌸

First up, the signature vibe:

static const bool is_iec559;      (until C++11)
static constexpr bool is_iec559;  (since C++11)

The value of std::numeric_limits<T>::is_iec559 is true for all floating-point types T which fulfill the requirements of IEC 559 (IEEE 754) standard. If std::numeric_limits<T>::is_iec559 is true, then std::numeric_limits<T>::has_infinity, std::numeric_limits<T>::has_quiet_NaN, and std::numeric_limits<T>::has_signaling_NaN are also true. No cap. 💯

👑 Standard specializations 👑

Here's the whole squad: for each T, the value of std::numeric_limits<T>::is_iec559 is...

• /* non-specialized */ — false
• bool — false
• char — false
• signed char — false
• unsigned char — false
• wchar_t — false
• char8_t (since C++20) — false
• char16_t (since C++11) — false
• char32_t (since C++11) — false
• short — false
• unsigned short — false
• int — false
• unsigned int — false
• long — false
• unsigned long — false
• long long (since C++11) — false
• unsigned long long (since C++11) — false
• float — usually true
• double — usually true
• long double — usually true

🔍 See also 🔍

• has_infinity — identifies floating-point types that can represent the special [static] value "positive infinity" (public static member constant).
• has_quiet_NaN — identifies floating-point types that can represent the special [static] value "quiet not-a-number" (NaN) (public static member constant).
• has_signaling_NaN — identifies floating-point types that can represent the special [static] value "signaling not-a-number" (NaN) (public static member constant).

That's the whole page, bestie. Source/version: http://cppreference.com; date: 2024.06.10; page: std::numeri...::is_iec559(3). Go forth and vibe check your floating-point types! 💖🦋