Code

Existential Capabilities#20566

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bracevac merged 61 commits intoscala:mainscala/scala3:mainfrom

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Jul 19, 2024

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Commits on Jul 17, 2024

• More robust level handling

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• Add existential capabilities, 2nd draft

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• Generalize isAlwaysEmpty and streamline isBoxedCaptured

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• Refine class refinements

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• Improve handling of no-cap-under-box/unbox errors

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• Go back to original no cap in box/unbox restrictions

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• More robust scheme to re-check definitions once.

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• Show unsuccessful subCapture tests in TypeMismatch explanations

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• Enable existential capabilities

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• Tighten rules against escaping local references

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• Go back to expansion of capability class references at Setup

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• Drop expandedUniversalSet

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• Adapt new capability class scheme to existentials

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• Map capability classes to existentials

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• Change encoding of impure dependent function types

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• Fix mapping of cap to existentials

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• Let only value types derive from Capabilities

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• Type inference for existentials

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• Drop checkReachCapsIsolated restriction

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• Drop no universal in deep capture set test everywhere from source 3.5

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• Disallow to box or unbox existentials

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• Fix existential mapping of non-dependent impure function aliases =>

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• Drop restrictions in widenReachCaptures

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• Cleanup ccConfig settings

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• Don't add ^ to singleton capabilities during Setup

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• Refine parameter accessors that have nonempty deep capture sets

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• More precise capture set unions

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• First implementation of capture polymorphism

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• Reclassify maximal capabilities

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• Bring back RefiningVar

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• Allow for embedded CapSet^{refs} entries in capture sets

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• Improve printing of capture sets before cc

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• Add some neg tests

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• Update doc page

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• Fix glb logic involving capturing types

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• Add option to avoid intersections for class refinements

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• Fix printing of reach capabilities

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• Introduced @unboxed parameters

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• Fix accidentally enabled warning about open classes

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• Disable special treatment of eta expansions in recheckClosure

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• Implement @unboxed annotation exemption for reach capabilities of parameters

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• Add @unboxed to failing tests and standard library file Buffer.scala

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• Fix isAlwaysPure

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• Fix special capture set handling in recheckApply, Step 1

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• Fix special capture set handling in recheckApply, Step 2

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• Refactor CaptureRef operations

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• Break out CaptureRef into a separate file

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• Don't box arguments of any form of type cast or test

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• Revert "Fix special capture set handling in recheckApply, Step 2"

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• Fix special capture set handling in recheckApply, Step 2 revised

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• Fix captureSet computations for false reach capabilities

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• Tweak deep capture set computations

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• Make the unboxed parameter scheme standard

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• Rename @unboxed --> @unbox

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• Another test

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• Check that overrides don't change the @unbox status of their parameters

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• Fix lubs over capturing types

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• Don't do post checks in inlined code

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Commits on Jul 18, 2024

• Widen non-trackable singleton types before computing their dcs

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• Give some explanation if a capture set was under-approximated

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• Split postcheck phase in two

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