Preprocessing recursion

[Vladimir Lipskiy]

D:\build\parrot>nmake

...

        cl -nologo -Od -MD -Zi -DDEBUGGING -DWIN32 -D_CONSOLE -DNO_STRICT
I../include -Focsub.obj -c csub.c
csub.c
csub.pmc(47) : error C2039: 'ptrs' : is not a member of '__unnamed'
        ../include\parrot/pobj.h(38) : see declaration of '__unnamed'
NMAKE : fatal error U1077: 'cl' : return code '0x2'
Stop.
NMAKE : fatal error U1077: 'cd' : return code '0x2'
Stop.

Seems like my MSVC++ 6.0 preprocesses

#define struct_val ptrs.struct_val

as

ptrs.ptrs.struct_val

'cause the error dissapears when I add an underscore to struct_val:

typedef union UnionVal {
    ...
    struct {                    /* PMC unionval members */
        DPOINTER* _struct_val;   /* two ptrs, both are defines 
    ...
} UnionVal;