Value representation of floating point types
suggest changeThe standard requires that long double
provides at least as much precision as double
, which provides at least as much precision as float
; and that a long double
can represent any value that a double
can represent, while a double
can represent any value that a float
can represent. The details of the representation are, however, implementation-defined.
For a floating point type T
, std::numeric_limits<T>::radix
specifies the radix used by the representation of T
.
If std::numeric_limits<T>::is_iec559
is true, then the representation of T
matches one of the formats defined by IEC 559 / IEEE 754.
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