std::numeric_limits::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`
`signed char`	`true`
`unsigned char`	`true`
`wchar_t`	`true`
`char16_t`	`true`
`char32_t`	`true`
`short`	`true`
`unsigned short`	`true`
`int`	`true`
`unsigned int`	`true`
`long`	`true`
`unsigned long`	`true`
`long long`	`true`
`unsigned long long`	`true`
`float`	`false`
`double`	`false`
`long double`	`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 aren't integers, e.g. a rational arithmetics 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::is_exact

Standard specializations

Notes

See also