[EMAIL PROTECTED] schreef:
Quoting Vincent Snijders <[EMAIL PROTECTED]>:
C Western schreef:
ð£ÔÒ ëÏÓÁÒÅ×ÓËÉÊ wrote:
In the math unit are the CompareValue functions only for signed
integers. Why not for DWORD and QWORD?
I guess, that it's Delphi mimicing implementation (because it is
Delphi-like).
And it can be tricky to distinguish signed and unsigned expression
values.
Like,
a: qword;
a-1 --- ??? (anyone may know for sure that a-1>0 and want to subtract
one)
I guess it's something like that.
If you check <http://www.freepascal.org/mantis/view.php?id=8448> you can
see this bug in action - the fpcadds and math unit provide signed and
unsigned versions of CompareValue, but the correct one is not always
chosen.
What a lousy compiler we use! ;-)
Do you have a testprogram, so I can make a fpc bug report?
I think this is inherent in the language design, as it is too easy to convert
between signed and unsigned integers. For example should the call:
CompareValue(0,0)
use the signed or unsigned version?
But in this particular case, I did not use constants, but variables of
the same type.
Vincent
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