[Lazarus] How to find out why a unit is used in a project?

[Sven Barth]

Bo Berglund via lazarus <lazarus at lists.lazarus-ide.org> schrieb am Do., 24.
Sep. 2020, 15:22:

> On Thu, 24 Sep 2020 14:22:13 +0200, Sven Barth via lazarus
> <lazarus at lists.lazarus-ide.org> wrote:
>
> >Well, Bo could always split the data type declarations into a separate
> >unit.
>
> But I cannot wrap my head around this (constructed example):
>
> interface
>
> type
>  TMyRecord = packed record
>    Item1: word;
>    Item2: Cardinal;
>   end;
>
>
> TMyController = class
>   private
>     FGPIO_driver: TIoDriver;
>     FGpF: TIoPort;
>     function CheckValidRelay(Relay: byte): boolean;
>   public
>     constructor Create;
>     destructor Destroy; override;
>     procedure ClearRelays;
>     function PulseRelay(Relay: byte; PulseTime: LongWord): boolean;
>     function RelayOff(Relay: byte): boolean;
>     function RelayOn(Relay: byte): boolean;
>     function RelayState(Relay: byte): boolean;
>     procedure Delay(T: LongWord);
>   end;
>
> implementation
>   ...All of the methods here...
>
> AFAIK the records could be declared elsewhere but the objects not
> since their methods, constructor, destructor etc reside in the same
> file below implementation, right?
>

Would your code require the hypothetical TMyController or only the
TMyRecord? If it only requires the later then you could indeed solve this
by moving the record into a separate unit. If your code requires
TMyController as well, then it can't be left out anyway (though the
compiler will leave out any non-virtual method of that class which isn't
used).


> Just specifying a uses file with everything above the implementation
> will not cut it, right?
>

No, that will not help.

Regards,
Sven
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