[m-rev.] diff: disable failing `hlc' grade tests

[Zoltan Somogyi]

On 23-Oct-2002, Fergus Henderson <fjh at cs.mu.OZ.AU> wrote:
> 	Disable the nondet C tests for non-GC hl* grades, since it
> 	is not yet supported in those grades (it gets a "sorry,
> 	not implemented message).

Several months ago Fergus and I talked and agreed that nondet foreign_procs
should be deprecated, with the reference manual updated to show how to get the
same effect, using Mercury code to introduce nondeterminism and doing the
low-level stuff in the foreign language. We already use the technique to
implement string__append in the (out,out,in) mode.

Nondet foreign_procs are a pain even for the LLDS backend, and they are not
properly supported by the debugger (which is why I changed string__append).

Zoltan.
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