[mercury-users] false function

[Michael Day]

Hi,

Does it make sense to add a false function to std_util:

:- func false = _ is failure.

For use in semidet functions:

can_fail(X) =
    ( if X = 1 then
         "one"
    else if X = 2 then
         "two"
    else
         false
    ).

Or is this just too confusing?

Michael

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