// WinXP with D v0.129 (and v0.128)
At first, I couldn't understand why my D code was falling into areas of code it
shouldn't have...until I discovered that the negative numbers were being treated
as if they were positive numbers in my compares. As the example below shows:

# //negcompare.d
# private import std.stdio;
# int main()
# {
#     writefln("main() : (-128 >= 0)=%s, (-128 <= 0)=%s",
#              (-128 >= 0 ? "true" : "false"),
#              (-128 <= 0 ?  "true" : "false"));
#
#     writefln("main() : (128 >= 0)=%s, (128 <= 0)=%s",
#              (128 >= 0 ? "true" : "false"),
#              (128 <= 0 ?  "true" : "false"));
#
#     return 0;
# }

Output:
--------
C:\dmd>dmd negcompare.d
C:\dmd\bin\..\..\dm\bin\link.exe negcompare,,,user32+kernel32/noi;

C:\dmd>negcompare
main() : (-128 >= 0)=true, (-128 <= 0)=false
main() : (128 >= 0)=true, (128 <= 0)=false

C:\dmd>

David L.

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MKoD: http://spottedtiger.tripod.com/D_Language/D_Main_XP.html

"David L. Davis" <SpottedTiger@yahoo.com> wrote in message news:dddcir$ds4$1@digitaldaemon.com...
> // WinXP with D v0.129 (and v0.128)
> At first, I couldn't understand why my D code was falling into areas of
> code it
> shouldn't have...until I discovered that the negative numbers were being
> treated
> as if they were positive numbers in my compares. As the example below
> shows:

Oh dear.  Confirmed 0.129 Windows.

David L. Davis schrieb:

> // WinXP with D v0.129 (and v0.128)
> At first, I couldn't understand why my D code was falling into areas of code it
> shouldn't have...until I discovered that the negative numbers were being treated
> as if they were positive numbers in my compares. As the example below shows:
> 
> # //negcompare.d
> # private import std.stdio;
> # int main()
> # {
> #     writefln("main() : (-128 >= 0)=%s, (-128 <= 0)=%s",
> #              (-128 >= 0 ? "true" : "false"),
> #              (-128 <= 0 ?  "true" : "false"));
> #
> #     writefln("main() : (128 >= 0)=%s, (128 <= 0)=%s",
> #              (128 >= 0 ? "true" : "false"),
> #              (128 <= 0 ?  "true" : "false"));
> #
> #     return 0;
> # }
> 
> Output:
> --------
> C:\dmd>dmd negcompare.d
> C:\dmd\bin\..\..\dm\bin\link.exe negcompare,,,user32+kernel32/noi;
> 
> C:\dmd>negcompare
> main() : (-128 >= 0)=true, (-128 <= 0)=false
> main() : (128 >= 0)=true, (128 <= 0)=false
> 

Added to DStress as http://dstress.kuehne.cn/run/o/opCmp_05_A.d http://dstress.kuehne.cn/run/o/opCmp_05_B.d http://dstress.kuehne.cn/run/o/opCmp_05_C.d http://dstress.kuehne.cn/run/o/opCmp_05_D.d http://dstress.kuehne.cn/run/o/opCmp_05_E.d http://dstress.kuehne.cn/run/o/opCmp_05_F.d

Thomas