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Doing this:
fun test a 0.0 = "good"
| test a b = "bad";
results in an error, but if I change the 0.0 the error goes away. However, I need to match 0.0 and I’m wondering if and how that can be accomplished.
Supposedly it’s because real is not an eqtype in SML 97: http://www.smlnj.org/doc/Conversion/types.html#Real-equality