2010/9/27 Jim <hakki...@gmail.com>: > Fpc sometimes complains (hints) about local variables not being initialized. > My question: how do I initialize more complicated structures like > records? And should I need to (I'm guessing no in the example below, but > the contents of the record will be undefined - no problem as there are > no pointers/strings in there)? > > Example: > .... > Type > TIfdTag = packed Record > ID: word; > //Tag number > Typ: word; > //Type tag > Count: cardinal; > //tag length > Offset: cardinal; > //Offset / Value > End; > .... > Var > tag: TIfdTag; > .... > in code somewhere > ReadTag(tag); > > As TIfdTag seems to contain non-pointer records only, I thought I could > use Sizeof and tried this: > FillByte(tag, SizeOf(tag), 0); //initialize var. > The compiler warning doesn't go away though. > > Is this the recommended way of doing things?
There is not enough code shown to say much. If the ReadTag procedure is declared with a presumably var paramater of type TIfdTag then the compiler warning is OK if the passed record has not been initialized in any way. In such case it may/should help to change the 'var' paramater to an 'out' parameter to explicitly tell the compiler that there is nothing going into ReadTag but only the other way. HTH -- bflm freepascal-bits.blogspot.com _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
