c++iphone

IPhone compilation of ported code problems: variable given same name as typedef'd type failing

check this out:

this compiles fine on iPhone:

typedef int ATYPE;

void AFunc()
{
    ATYPE ATYPE;
    ATYPE = 1337;
}

this compiles fine on iPhone:

typedef int ATYPE;
typedef ATYPE _ATYPE;

struct AStruct
{
    _ATYPE ATYPE;
};

void AFunc()
{
    AStruct bob;
    bob.ATYPE = 1337;
}

but this does NOT:

typedef int ATYPE;

struct AStruct
{
    ATYPE ATYPE;
};

void AFunc()
{
    AStruct bob;
    bob.ATYPE = 1337;
}

the above compiles fine on other platforms though.

I suppose we can work around it by doing that second example, but does anyone know why this is?

Solution

  • Well, if you don't like my previous answer, here's the alternate one. The online Comeau C++ compiler at http://www.comeaucomputing.com/tryitout/ compiles your third example without error. Given that that's typically considered a gold standard among C++ compilers, this suggests that this may well be a bug in the G++ compiler in the iPhone SDK (and, of course, in the other versions of G++ that I referenced in my comment).

    If that's true -- and I don't have the C++ spec at hand to argue the fine details -- the answer to your "why?" question is, "Because G++ has a weird corner-case bug. Please file an issue in the GCC bug tracker about this, so that someone will fix it."