Overlay Record

Cusko

Subject:

Overlay Record

· Posted: 18.04.2011 - 15:16 · #1

Hi,

Why can't I overlay Array in Record. See the example under:

Code

type

  tSelect_LCD = record
                  LCDSelected : byte;
                  Reserved    : byte;
                end;

  tPacket   = Record
                Cmd      : word;
                Len      : word;
                prevMsg  : word;
                Data     : Array[0..255] of Byte;
              end;
var

  RecPacket  : tPacket;
  LCD [ @RecPacket.Data ] : tSelect_LCD;

Thank you,
Bostjan

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Subject:

Re: Overlay Record

· Posted: 18.04.2011 - 22:14 · #2

Hello Bostjan,

this kind of overlay is not supported. But you can implement it in this way:

Code

type
  tPacket = Record
              Cmd                : word;
              Len                : word;
              prevMsg            : word;
              Data               : Array[0..255] of Byte;
              LCDSelected[@Data] : byte;
              Reserved[@Data+1]  : byte;
            end;

rolf

Cusko

Subject:

Re: Overlay Record

· Posted: 19.04.2011 - 00:07 · #3

Thank you Rolf.

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