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std::numeric_limits::traps(3) C++ Standard Libarystd::numeric_limits::traps(3) NAME std::numeric_limits::traps - std::numeric_limits::traps Synopsis static const bool traps; (until C++11) static constexpr bool traps; (since C++11) The value of std::numeric_limits<T>::traps is true for all arith- metic types T that have at least one value that, if used as an argument to an arith- metic operation, will generate a trap. Standard specializations T value of std::numeric_limits<T>::traps /* non-specialized */ false bool false char usually true signed char usually true unsigned char usually true wchar_t usually true char8_t (C++20) usually true char16_t (C++11) usually true char32_t (C++11) usually true short usually true unsigned short usually true int usually true unsigned int usually true long usually true unsigned long usually true long long (C++11) usually true unsigned long long (C++11) usually true float usually false double usually false long double usually false Notes On most platforms integer division by zero always traps, and std::numeric_limits<T>::traps is true for all integer types that support the value 0. The exception is the type bool: even though division by false traps due to integral promotion from bool to int, it is the zero-valued int that traps. Zero is not a value of type bool. On most platforms, floating-point exceptions may be turned on and off at run time (e.g. feenableexcept() on Linux or _controlfp on Windows), in which case the value of std::numeric_limits<T>::traps for floating-point types reflects the state of floating-point trapping facility at the time of program startup, which is false on most modern systems. An exception would be a DEC Alpha program, where it is true if compiled without -ieee. See also Floating-point environment tinyness_before identifies floating-point types that detect tinyness before rounding [static] (public static member constant) has_denorm_loss identifies the floating-point types that detect loss of precision as [static] denormalization loss rather than inexact result (public static member constant) http://cppreference.com 2022.07.31 std::numeric_limits::traps(3)
NAME | Synopsis | Standard specializations | Notes | See also | Floating-point environment
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