[m-dev.] for review: use NULL for empty field types RTTI

[Peter Ross]

On Tue, Nov 14, 2000 at 10:13:58PM +1100, Fergus Henderson wrote:
> Peter Ross, could you please review this one?
> 
> Estimated hours taken: 1
> 
> compiler/rtti.m:
> compiler/rtti_out.m:
> compiler/rtti_to_mlds.m:
> compiler/type_ctor_info.m:
> 	When generating RTTI for constructors with no arguments, don't
> 	generate empty `field_types' arrays; not all C compilers
> 	support empty array initializers.  Instead, if there are no
> 	arguments, just use a null pointer.
> 
> 	This is slightly more efficient than the previous approach to
> 	this problem which was to generate an array containing a
> 	single dummy element.  With this approach, we generate a null
> 	pointer rather than a pointer to an array containing a null pointer.
> 	
> 	The other advantage of this change is that it makes the
> 	treatment of the `field_types' array consistent with how we
> 	treat the `field_names' array.
> 

This change looks fine.

Any plans to do it for the other two array types where I inserted dummy
values?

Pete
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