digitalmars.D.bugs - [Issue 13191] New: Silenced forward struct reference error
- via Digitalmars-d-bugs (49/49) Jul 22 2014 https://issues.dlang.org/show_bug.cgi?id=13191
https://issues.dlang.org/show_bug.cgi?id=13191 Issue ID: 13191 Summary: Silenced forward struct reference error Product: D Version: D2 Hardware: All OS: All Status: NEW Keywords: diagnostic Severity: normal Priority: P1 Component: DMD Assignee: nobody puremagic.com Reporter: blah38621 gmail.com Currently the following code produces 4 errors, all of which are completly and utterly useless. main.d(7): Error: variable main.SymbolType.PointerData.size conflicts with variable main.SymbolType.PointerData.size at main.d(7) main.d(8): Error: variable main.SymbolType.PointerData.typePointedTo conflicts with variable main.SymbolType.PointerData.typePointedTo at main.d(8) main.d(7): Error: variable main.SymbolType.PointerData.size conflicts with variable main.SymbolType.PointerData.size at main.d(7) main.d(8): Error: variable main.SymbolType.PointerData.typePointedTo conflicts with variable main.SymbolType.PointerData.typePointedTo at main.d(8) struct SymbolType { static struct PointerData { ubyte size; SymbolType typePointedTo; } union { PointerData pointerData; } } However something magical happens when we move the union above the PointerData struct, we get an extra error that we didn't get before: main.d(10): Error: struct main.SymbolType.PointerData no size yet for forward reference This code will never ever be able to compile due to the fact SymbolType is a struct, however that error appears to be getting silenced if the union is after the struct declaration. If the anonomous union is replaced with a named union, the error is no longer dependent on the location of the union declaration. This should really only be producing 1 error, and that is the "no size yet" error. It should also be being displayed on the member that requires the forward reference, in this case, typePointedTo, rather than on the struct declaration itself. --
Jul 22 2014