Re: Multiple inheritance

[mrs at wrs dot com (Mike Stump)]

> From: "Joshua S. Allen" <allen@eecs.tulane.edu>
> To: mrs@wrs.com (Mike Stump)
> Date: Wed, 10 Dec 1997 09:21:57 -0600 (CST)

> I've been trying to look at the data in BINFO_BASETYPES using TREE_VALUE

Please refer to the code and the .h files:

/* A vector of additional binfos [...]

#define BINFO_BASETYPES(NODE)

This:

/* In a TREE_LIST node.  */
#define TREE_VALUE(NODE) ((NODE)->list.value)

means that this works for a TREE_LIST (only).  A vector isn't a TREE_LIST.

> but it just gives me an integer, which I assume it an offset maybe.

Now, it means nothing because it isn't valid.

> Is there a way to get a string value of the class name?

TYPE_NAME_STRING(TYPE), it's meant to be readable.  From a sample use:

	    cp_error ("`%D' is already defined in class %s", fndecl,
			         TYPE_NAME_STRING (DECL_CONTEXT (fndecl)));

We can see that it should give us a %s type name of a type.  The trick
then it to get the type from the binfo.  Guess what:

TYPE_BINFO (BINFO_TYPE (TREE_VEC_ELT (BINFO_BASETYPES (binfo_h), i)))

kinda sums up how to do that.  You can find these snippets in the
code.  In fact, looking further, we see:

/* Accessor macro to get to the Nth basetype of this basetype.  */
#define TYPE_BINFO_BASETYPE(NODE,N) BINFO_TYPE (TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (NODE)), (N)))

which even matches closer to what you wanted.