[fpc-devel] Overflow checks and Trunc/Round functions

[Alexander Klenin]

Currently, Round and Trunc functions ignore the state of $OVERFLOWCHECKS
compiler directive. The following code prints "-2 -2":

{$MODE OBJFPC}{$OVERFLOWCHECKS ON}
var
  a: Integer;
  b: Double;
begin
  b := MaxInt;
  a := Round(2.0 * b);
  Writeln(a);
  a := Trunc(2.0 * b);
  Writeln(a);
end.

This is Delphi-compatible.
However, I think this is a bug, even if Delphi-inherited, and should
be fixed in fpc/objfpc mode.
What do others think?

-- 
Alexander S. Klenin