[mercury-users] Inst problem with hash tables

[Ralph Becket]

Andrea Bini, Monday, 22 September 2008:
>    It is compiled with no errors but when run it reports the error
>    "Invalid ht.dat". I think that the problem resides in the high-order
>    term in the hash table structure. It is written to disk just as the
>    string '<<predicate>>'.
>    How can I fix this problem?

Ah, of course!  The short answer is: you can't, because there is no
portable way of writing out bits of code (which is what the higher order
term is).

In this case I withdraw my objection to Paul's suggestion.  The solution
has to be something like that: convert the hash_table into an
assoc_list and use that as your on-disc representation.  Sorry for
misleading you.

-- Ralph
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