Code

Existential Capabilities#20566

Code

Merged

bracevac merged 61 commits intoscala:mainscala/scala3:mainfrom dotty-staging:cc-ex-2dotty-staging/dotty:cc-ex-2Copy head branch name to clipboardJul 19, 2024

+3,010-924

Commits

Commits on Jul 17, 2024

• More robust level handling

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  0e71645

• Add existential capabilities, 2nd draft

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  5b9d305

• Generalize isAlwaysEmpty and streamline isBoxedCaptured

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  b375d97

• Refine class refinements

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  f9ddc71

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

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  0458012

• 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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  a30cf47

• Enable existential capabilities

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  20b8630

• Tighten rules against escaping local references

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  ca715e8

• 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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  7296b40

• 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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  687516e

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

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  9b27b69

• Disallow to box or unbox existentials

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  1d3ae88

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

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  4ad9e3c

• Drop restrictions in widenReachCaptures

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  b950c7d

• Cleanup ccConfig settings

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  adfb700

• Don't add ^ to singleton capabilities during Setup

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  7bf8be7

• Refine parameter accessors that have nonempty deep capture sets

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  cd78a9e

• More precise capture set unions

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• First implementation of capture polymorphism

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  04aa63d

• Reclassify maximal capabilities

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  9436f11

• Bring back RefiningVar

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  7ac94c9

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

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  aad3395

• Improve printing of capture sets before cc

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  1c11071

• Add some neg tests

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  72462a7

• Update doc page

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  0a1854d

• Fix glb logic involving capturing types

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  c965322

• Add option to avoid intersections for class refinements

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  2cd685a

• Fix printing of reach capabilities

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  8b03405

• Introduced @unboxed parameters

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  520100b

• Fix accidentally enabled warning about open classes

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  7708276

• Disable special treatment of eta expansions in recheckClosure

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  2b04423

• 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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  4333d3e

• 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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  cc95088

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

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  3667ab8

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

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  d8ace30

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

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  7db1d43

• Fix captureSet computations for false reach capabilities

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  c1036bf

• Tweak deep capture set computations

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• Make the unboxed parameter scheme standard

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  082214e

• Rename @unboxed --> @unbox

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• Another test

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  0b22948

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

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  91cbca8

• Fix lubs over capturing types

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• Don't do post checks in inlined code

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  c8d418a

Commits on Jul 18, 2024

• Widen non-trackable singleton types before computing their dcs

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  04dba38

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

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• Split postcheck phase in two

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