[Issue 1160] enums can not be forward referenced

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1160





------- Comment #1 from tomas at famolsen.dk  2008-01-10 16:52 -------
the simplest test case is something like this:

X x;
enum X { Y };

Fails to compile with 'enum is forward referenced' error.
This issue came up on IRC and I decided to take a look what was going on.
The issue is that the basetype cannot be resolved.

A working workaround is:

X x;
enum X : int { Y };

This patch (against LLVMDC, might not match 100%) ...

Index: dmd/declaration.c
===================================================================
--- dmd/declaration.c   (revision 135)
+++ dmd/declaration.c   (working copy)
@@ -642,6 +642,7 @@
     Dsymbol *parent = toParent();
     FuncDeclaration *fd = parent->isFuncDeclaration();

+    type->semantic(loc,sc);
     Type *tb = type->toBasetype();
     if (tb->ty == Tvoid && !(storage_class & STClazy))
     {  error("voids have no value");

... also fixes the problem. I have no idea what other problems it might
introduce though... Also I doubt it will fix all the variations of this issue.
I haven't looked enough at the semantics code in DMD to fix this properly.

However, this seems like something that shouldn't be *that* hard to fix... Why
not put in the works for Type::toBaseType to be able to run semantics?

Please enlighten me (us) as to why this is implemented as it is right now!


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