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 arithmetic types T that have at least one value at the start of the program that, if used as an argument to an arithmetic operation, will generate a trap.
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 (since C++20) usually true char16_t (since C++11) usually true char32_t (since 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 (since C++11) usually true unsigned long long (since C++11) usually true float usually false double usually false long double usually false [edit] 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 â0â. 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.
Possible output:
// GCC output: bool: traps = true char: traps = true char16_t: traps = true long: traps = true float: traps = false // Clang output: bool: traps = false char: traps = true char16_t: traps = true long: traps = true float: traps = false[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR Applied to Behavior as published Correct behavior LWG 497 C++98 it was unclear what is returned if trappingRetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4