topic aCC enum bug in Operating System - Linux

aCC enum bug

Andreas Aardal Hanssen — Mon, 17 Jul 2006 02:08:33 GMT

aCC 3.57 fails to compile this code, which is valid C++ and compiles with gcc, MSVC*, and more.

---

class A {
};

class B {
enum {
A,
C = A
};
};

---

Error 24: "main.cpp", line 7 # '' expected instead of 'A'.
C = A
^
Error 216: "main.cpp", line 8 # Integer constant expected in enumerator initialization.
};
^

Re: aCC enum bug

Peter Godron — Mon, 17 Jul 2006 07:34:32 GMT

Andreas,
I have only ever seen either:
enum{A,C};
or
enum{A,C=4);
After compiling your code in gcc, what happens at that statement,if you run it?

aCC may not let you compile because it could generate an invalid condition.

Re: aCC enum bug

Andreas Aardal Hanssen — Mon, 17 Jul 2006 07:50:36 GMT

Enum values can always take the value of other enum values. This is commonly used in API design when an enum entry needs to be renamed, yet keep the same value. The condition is not invalid.

enum {
A,
B,
C = A // Value = 0.
};

This is also what happens when compiling it. C = A is the same as C = 0. aCC cannot compile this code; it's a bug in aCC :-).

Re: aCC enum bug

Dennis Handly — Tue, 18 Jul 2006 03:44:28 GMT

Andreas is right, it is a bug.
It works fine with aCC6 and with A.03.67, PHSS_34414

It is CR JAGae88844: Error 24 Unable to distinguish b/w tentative class and enum constant