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POHow to define a Type A in Type B and Type B in Type A?
 

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  1. POHow to define a Type A in Type B and Type B in Type A?
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    <p>I have two types. One Type A and one Type B. The Problem Type A contains Type B and Type B contains Type A. Such a thing like this won't work:</p> <pre><code> type typeA = record test1 : typeB; end; type typeB = record test2 : typeA; end; </code></pre> <p><strong>Edit:</strong> Thats not my design. I converting C Header files (to access a DLL) that include such constructs to delphi.</p> <p><strong>Edit2:</strong> "C++ structs are another name for classes AFAIR. And there must have been pointers, not values themselves. – Arioch 'The 1 min ago" Yes you are right that was a Pointer to a Type:</p> <p>There I definied:</p> <pre><code>test1 : ^typeB; </code></pre> <p>Will that work instead?</p> <pre><code>test1 : Pointer; </code></pre> <p><strong>Edit3:</strong> The C Structs:</p> <pre><code>/* DLPDFPAGE */ typedef struct dlpdfpage { CosObj Page; CosObj PrintSelect; ASFixedRect PageBBox; ASFixedRect ContentBBox; struct dlpdfpage *Next; PDRotate Angle; struct dlpdfdoc *Doc; DLPDFSTREAM *Content; long PageNumber; char Complete; char FontSubstituted; char FontMM; char FontBad; } DLPDFPAGE; /* DLPDFDOC */ typedef struct dlpdfdoc { DLPDFINSTANCE *dliInstance; PDDoc pdDoc; CosDoc cosDoc; DLPDFOUTLINE *Outlines; char *PDFFileName; char *PDFPostFileName; DLPOS LastPageEnd; DLPOS BeforeDef; ASFixedRect DocBBox; long PageCount; long PageTreeWidth; long PageTreeDepth; long PageTreeDepthUsed; DLPDFPAGETREEARRAY *AllPages; DLPDFFONTLIST *AllFonts; DLPDFFORMLIST *AllForms; DLPDFFORMLIST *AllColors; DLPDFIMAGELIST *AllImages; DLPDFSPOTCOLORLIST *AllSpotColors; DLPDFSPOTCOLORLIST *AllPatterns; DLPDFEXTGSTATELIST *AllExtGStates; DLPDFPAGE *PageList; DLPDFPAGE *LastPage; DLPDFDEST *DeferedDests; DLPDFSIGNATURE *signatureHolder; struct dlpdfacroform *AcroFormBase; CosObj PatternColorObj, PatternColorRGBObj, PatternColorCMYKObj, PatternColorGrayObj, PrintSelect, PrintSelectCriteria; CosObj IdentH, IdentV; ASAtom DocumentEncoding; long FontCount; long FormCount; long PatCount; long ImageCount; char Compress; char Linearize; char PageTreeComplete; char EmbedFonts; char PatternColorsDefined; char MakeThumbNails; ASBool psSevenBitSafe; ASInt32 EncryptKeyByteCount; char condenseResDicts; CosObj resourceDict; ASInt16 pdfMajorVer; ASInt16 pdfMinorVer; DLPDFINCLUDEDRES *InclRes; DLPDFSPOTCOLORLIST *AllShadings; long ShadeCount; } DLPDFDOC; </code></pre>
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    1. COC++ structs are another name for classes AFAIR. And there must have been pointers, not values themselves.
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    2. COYou should post the original C type declaration so we can offer some actual help, beyond explaining why what you tried doesn't work.
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    3. CO@Arioch'The, even if the `C++` struct would be the same as `class`, a C++ class is not automatically allocated from the heap and a variable of the class type would not automatically be a reference type (unlike in Delphi). This is not a pointer in C++: `aname aClassType;` - but this is: `aname* aClassType;`.
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