fp-infinity? ( x -- ? )
Factor handbook » The language » Numbers » Floats » Bitwise operations on floats

Prev:	fp-snan? ( x -- ? )
Next:	fp-nan-payload ( x -- bits )

Vocabulary
math

Inputs

x

a real

Outputs

?

a boolean

Word description
Tests if x is an IEEE Infinity value. While x can be any real number, this word will only ever yield true if x is a float.

Examples

USING: math prettyprint ; 1/0. fp-infinity? .
t

USING: io kernel math ; -1/0. [ fp-infinity? ] [ 0 < ] bi and [ "negative infinity" print ] when
negative infinity

See also
fp-special?, fp-nan?, fp-qnan?, fp-snan?, fp-nan-payload, <fp-nan>

Definition

IN: math

GENERIC: fp-infinity? ( x -- ? )

Methods

USING: kernel math ;

M: float fp-infinity?
    dup fp-special? [ fp-nan-payload zero? ] [ drop f ] if ;
    inline


USING: kernel math ;

M: object fp-infinity? drop f ; inline