Is it correct (i.e. by design) that the compiler emits some "may not be
initialized" warnings, only on certain optimization levels?
The following is
- NOT given with -O1
- present with -O3
lazsyntextarea.pp(1325,54) Warning: Local variable "ViewedRange" does
not seem to be initialized
O1 is actually right, it is always initialized, no warning needed. But I
would accept that the compiler may not be able to deduce that.
However, if it does not, then should O1 also display the warning?
procedure TLazSynSurfaceManager.InvalidateLines(FirstTextLine,
LastTextLine: TLineIdx; AScreenLineOffset: Integer);
var
rcInval: TRect;
ViewedRange: TLineRange;
begin
rcInval := Bounds;
if (FirstTextLine >= 0) then begin
ViewedRange := DisplayView.TextToViewIndex(FirstTextLine);
rcInval.Top := Max(TextArea.TextBounds.Top,
TextArea.TextBounds.Top + (ViewedRange.Top +
AScreenLineOffset
- TextArea.TopLine + 1) * TextArea.LineHeight);
end;
if (LastTextLine >= 0) then begin
if LastTextLine <> FirstTextLine then
ViewedRange := DisplayView.TextToViewIndex(LastTextLine);
rcInval.Bottom := Min(TextArea.TextBounds.Bottom, ///////////////
<<<<<<< 1325
TextArea.TextBounds.Top + (ViewedRange.Bottom
+ AScreenLineOffset
- TextArea.TopLine + 2) *
TextArea.LineHeight);
end;
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