std::numeric_limits<T>::is_exact

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

The value of std::numeric_limits<T>::is_exact is true for all arithmetic types T that use exact representation.

Standard specializations

`T`	value of `std::numeric_limits<T>::is_exact`
/* non-specialized */	`false`
bool	`true`
char	`true`
signedchar	`true`
unsignedchar	`true`
wchar_t	`true`
char8_t (since C++20)	`true`
char16_t (since C++11)	`true`
char32_t (since C++11)	`true`
short	`true`
unsignedshort	`true`
int	`true`
unsignedint	`true`
long	`true`
unsignedlong	`true`
longlong (since C++11)	`true`
unsignedlonglong (since C++11)	`true`
float	`false`
double	`false`
longdouble	`false`

Notes

While all fundamental types T for which std::numeric_limits<T>::is_exact == true are integer types, a library may define exact types that are not integers, e.g. a rational arithmetic type representing fractions.

is_integer [static]	identifies integer types (public static member constant)
is_signed [static]	identifies signed types (public static member constant)
is_bounded [static]	identifies types that represent a finite set of values (public static member constant)

std::numeric_limits<T>::is_exact

Standard specializations

Notes

See also