Custom Query (1030 matches)

Consider the following example:

(defmacro mdiv0 () (/ 1 0)) (ignore-errors (mdiv0))

After executing the above line CCL invoke debugger with "DIVISION-BY-ZERO detected

[Condition of type DIVISION-BY-ZERO]"

If I replace defmacro with defun the result is as expected - two values - nil and divizion-by-zero condition are returned.

I get the following return values from INTEGER-DECODE-FLOAT. (Version 1.4-r13122 (WindowsX8632))

? (integer-decode-float 0s0)
0
-150
1
? (integer-decode-float 0f0)
0
-150
1
? (integer-decode-float 0d0)
0
-1074
1
? (integer-decode-float 0l0)
0
-1074
1

In contrast:

? (decode-float 0s0)
0.0
0
1.0
? (decode-float 0f0)
0.0
0
1.0
? (decode-float 0d0)
0.0D0
0
1.0D0
? (decode-float 0l0)
0.0D0
0
1.0D0

CLHS states that INTEGER-DECODE-FLOAT returns "the same last two values that are returned by decode-float". Observed behavior seems otherwise.

Ethan H. Schwartz 2009-07-23 10:53:02 EDT

Welcome to Clozure Common Lisp Version 1.4-dev-r12415-working-0711 
(LinuxX8664)!
? (intersection nil :a)
NIL
?