Version 8 of NaN

RS 2007-02-23: NaN is "Not a Number", a sort-of valid floating point value from Tcl 8.5. Here's experiments:

 (bin) 13 % set y [expr sqrt(-1)]
 -NaN
 (bin) 14 % expr {$y == $y} ;# the only value that is not equal to itself :^)
 0
 (bin) 15 % expr {$y eq $y}
 1

male 2007-02-23: Sorry, but using tclkit(sh)? 8.5a4 ...

 % expr {sqrt(-1)}
 domain error: argument not in valid range

RS I used tclkit 8.5a4 as well, on Win XP. So the patchlevel doesn't yet tell the full story :( Do the Inf examples work for you? male yes, the Inf examples all work for me. But ... my tclkit(sh)? executables are bit older, some of the first built.

LV Okay, so I use the base-tcl8.5-thread-solaris-sparc from ActiveTcl 8.5 beta. It says it is patchlevel 8.5a5. And I get the domain error, not the -NaN.