Re: [Cobolforgcc-devel] Re: %union

[Keisuke N. <kx...@po...>]

At Wed, 06 Jun 2001 21:25:56 +1000,
Tim Josling wrote:
> 
> With accessor macros, you have to look at the macro to see what
> is the underlying field. 
> 
> For example in gcc, TREE_USED(x) is common.used_flag. This is
> particularly a problem if the same field is used for multiple
> things, as it is in gcc (see tree.h). The debugger does not know
> about accessor macros AFAIK so in the debugger you have to know
> the real field names. static_flag has six different accessor
> macros. 
(snip)
> The other thing is that having one giant union means that when
> you do a p *x in gdb, the output goes for pages. On the other
> hand just having cast into a single struct * makes it more
> manageable. 

That's right, but regarding a debugger, what about writing a debug
printer for cobol trees, as GCC has debug_rtx and debug_tree?

Keisuke