Miscellaneous CC fixes and tweaks #20564
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Fixes the problem in effect-swaps.scala
This gives us the necessary levers to switch to existential capabilities.
odersky
changed the title
An expandedUniversalSet was the same as `{cap}` but not reference-equal
to CaptureSet.universal. This construct was previously needed to avoid
multiple expansions, but this does not seem to be the case any longer so
the construct can be dropped.
The encoding of (x: T) => U in capture checked code has changed.
Previously: T => U' { def apply(x: T): U }
Now: (T -> U' { def apply(x: T): U })^{cap}
We often handle dependent functions by transforming the apply method and then mapping
back to a function type using `.toFunctionType`. But that would always generate a
pure function, so the impurity info could get lost.
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All commits were merged via branch cc-ex-2 |
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Fixes the problem in effect-swaps.scala