Hi,
2010/7/13 Basile Starynkevitch <bas...@starynkevitch.net>:
> The type machinery then provides allocators that take a parameter indicating
> an exact size of object being allocated (like malloc does)
>
> and the exemple should better be
>
>
> Then the objects of struct sorted_fields_type are allocated in GC memory as
> follows, assuming n is the number of elements:
>
> field_vec = ggc_alloc_sorted_fields_type (sizeof(sorted_fields_type)
> + (n-1) * sizeof(tree));
I agree that these two changes would be an improvement.
> By the way, I would very much like that GCC code would assume that
> variable-sized struct-ures are permitted, and declare instead
> struct GTY((variable_size)) sorted_fields_type {
> int len;
> tree GTY((length ("%h.len"))) elts[];
> };
>
> Perhaps such a transition is needed, or at least very useful, even before any
> transition to C++ ?
Flexible array member is a C99 feature, IIRC GCC sources require C90.
Cheers,
--
Laurynas
