On 23/07/12 12:51, David Matthews wrote:
What this implies for the implementation is that it needs to actively
reduce any type abbreviations to their right hand sides before doing any
unification and also when applying the value restriction. This then
allows Phil's examples to work and also the simple example above. It
does have the unfortunate side-effect that expressions with type
abbreviations are not printed using the abbreviation in cases where it
used to.
Thanks for the update. I haven't noticed much difference in the printed
types. The only change worth mentioning is that
val it = (): unit
now prints as
val it = (): {}
which is worth alerting people to. For example, ProofPower build files
pattern match on that response to remove them.
Phil
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