| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
This constant has the value of IEEE single-float NaN (Not-a-Number). It is a legal floating-point value. In arithmetic operations, it produces NaNs of appropriate format (following standard floating-point coercion rules) in all cases. See the linked discussion for more details.
NaNs like this one can result from normal arithmetic operations, such
zero divided by zero in a function with types declared and compiled so
comp:trust-declarations-switch
is true,
but that same call run interpreted may instead signal an error.
See Floating-point infinities and NaNs, and
floating-point underflow and overflow in
implementation.htm. Also see
*negative-infinity-single*
,
*infinity-double*
,
*infinity-single*
,
*negative-infinity-double*
, and
*nan-double*
.
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.
| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |