On Thursday, 3 December 2020 at 00:30:06 UTC, Kyle Ingraham wrote:

// EDSDKTypes.h
typedef struct __EdsObject* EdsBaseRef;
typedef EdsBaseRef EdsCameraListRef;
//

[...]

// edsdk.d
struct EdsBaseRef;
alias EdsBaseRef EdsCameraListRef;

You've dropped a level of indirection here. In the C header, EdsBaseRef is a pointer, but in your D code, it is an opaque struct.

The correct way to translate these C declarations into D is:

struct __EdsObject;
alias EdsBaseRef = __EdsObject*;
alias EdsCameraListRef = EdsBaseRef;

Note that unlike C, D does not allow us to refer to an incomplete type without first declaring it.

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