If no available type eraser type exists, do not perform type erasure. If
multiple type erasers exist, choose the least available type eraser type.
Which type eraser to choose is based on the availability of the lexical
context of the erased expression.
Selectively revert 36683a804c to resolve
a source compatibility regression. See inline comment for use case. We
are going to consider acknowledging this use case in the rules in a
future release.
Usage of Span was temporarily behind an experimental feature flag. Now
that SE-0447 has been accepted, remove the experimental feature flag and
allow Span usage everywhere.
Implements rdar://144819992.
If destination is marked as `@preconcurrency` the Sendable conformance
errors should be downgraded to warnings even in Swift 6 mode just like
for member and subscript references.
Introduce a marker protocol SendableMetatype that is used to indicate
when the metatype of a type will conform to Sendable. Specifically,
`T: SendableMetatype` implies `T.Type: Sendable`. When strict
metatype sendability is enabled, metatypes are only sendable when `T:
SendableMetatype`.
All nominal types implicitly conform to `SendableMetatype`, as do the
various builtin types, function types, etc. The `Sendable` marker
protocol now inherits from `SendableMetatype`, so that `T: Sendable`
implies `T.Type: Sendable`.
Thank you Slava for the excellent idea!
This expands https://github.com/swiftlang/swift/pull/77510 to base
expressions of calls, subscripts and members to make sure that if
the base has `@preconcurrency` declaration at some level. Otherwise,
the availability checker won't appropriately downgrade unavailable
`Sendable` conformances for `@preconcurrency` declarations.
Keep track of all of the type parameters and archetypes that are captured
by a local function or closure. Use that information to diagnose cases
where a non-Sendable metatype crosses an isolation boundary.
It should be possible to pass values with `any Sendable` as arguments
to `inout` parameters that expect `Any`. This is pretty much the same
as an l-value conversion.
Resolves: https://github.com/swiftlang/swift/issues/79361
Resolves: rdar://144794132
This would make sure that async function types marked as `@execution(caller)`
have correct isolation.
Also defines all of the possible conversions to and from `caller`
isolated function types.
* Revert "[CSOptimizer] Look through `OptionalEvaluationExpr`s when dealing with unapplied disjunctions"
This reverts commit 72340f39b8.
* Revert "[CSOptimizer] Don't consider disabled overloads when checking whether disjunction is supported"
This reverts commit 6bc23b5057.
* Revert "[CSOptimizer] Disjunctions with IUO overload choices are unsupported"
This reverts commit 471ee21535.
* Revert "[CSOptimizer] MemberImportVisibility: Don't consider overloads that come from implicit imports"
This reverts commit aa4a2b9071.
* Revert "[CSOptimizer] Don't consider CGFloat widening when explicit initializer is used"
This reverts commit 3cc76eacdd.
* Revert "[CSOptimizer] Literal arguments should cause score reset only for operators"
This reverts commit e3987beffb.
* Revert "[CSOptimizer] NFC: check whether a choice is of operator instead of whole disjunction"
This reverts commit 6c82892c3c.
* Revert "[CSOptimizer/Tests] NFC: Add a perf test-case fixed by improved literal array handling"
This reverts commit cfd34e54c4.
* Revert "[CSOptimizer] Extend candidate/parameter matching to support array literals"
This reverts commit 8a304f88c6.
* Revert "[CSOptimizer] Favor choices that don't require application"
This reverts commit 0737542da8.
* Revert "[CSOptimizer] Disable CGFloat -> Double conversion for unary operators"
This reverts commit bc3a15fbe6.
* Revert "[CSOptimizer] Mark bitwise operators as supported"
This reverts commit 860ae08d1b.
* Revert "[CSOptimizer] Simplify handling of non-applied disjunctions"
This reverts commit 43ca7dfff9.
* Revert "[ConstraintSystem] Fix `getEffectiveOverloadType` handling of `mutating` methods"
This reverts commit c767f7aff7.
* Revert "[CSOptimizer] Reduce overload types before ranking"
This reverts commit 95b47aead6.
* Revert "[CSOptimizer] Implement special prioritization rules for result builder contexts"
This reverts commit 56d6635e46.
* Revert "[CSOptimizer] Allow only widening CGFloat->Double conversions while matching candidate arguments"
This reverts commit bf8ae3bc1b.
* Revert "[CSSimplify] CGFloat-Double: Rank narrowing correctly when result is injected into an optional"
This reverts commit cb876cbd9e.
* Revert "[CSBindings] Prevent `BindingSet::isViable` from dropping viable bindings (v2)"
This reverts commit b7e7493076.
* Revert "[CSOptimizer] Add support for chained members without arguments"
This reverts commit 87cd5f8733.
* Revert "[CSOptimizer] Mark compiler synthesized disjunctions as optimized"
This reverts commit 867e64182f.
* Revert "[CSOptimizer] Make a light-weight generic overload check if some requirements are unsatisfiable"
This reverts commit 15c773b9d7.
* Revert "[CSOptimizer] Fix `selectDisjunction` to use favored choices even if disjunction was not optimized"
This reverts commit c2a55886f0.
* Revert "[CSOptimizer] Limit "old" behavior compatibility to unlabeled unary arguments"
This reverts commit 9fb73143f6.
* Revert "[Tests] NFC: Update a couple of type-checker tests"
This reverts commit ff8663ff16.
* Revert "[Tests] NFC: Move simd related test-case from `slow` to `fast`"
This reverts commit 28396a6dce.
* Revert "[CSGen] NFC: Remove obsolete `ConstraintSystem::{get, set}FavoredType`"
This reverts commit 8bd288447f.
* Revert "[CSOptimizer] Allow literal arguments to match parameters that conform to `ExpressibleBy{Integer, Float}Literal`"
This reverts commit 2fdd4b6c35.
* Revert "[CSOptimizer] Adjust `scoreCandidateMatch` to indicate when match cannot be decided"
This reverts commit 9b62c84a4f.
* Revert "[CSOptimizer] Fix Double<->CGFloat implicit conversion support when arguments are literals"
This reverts commit 6caf1ccbb2.
* Revert "[CSOptimizer] A more comprehensive generic overload checking when candidates are fully resolved"
This reverts commit e30587bda4.
* Revert "[CSOptimizer] Restore old hack behavior which used to favor overloads based on arity matches"
This reverts commit a3a3ec4fe0.
* Revert "[CSOptimizer] Desugar types before checking for equality"
This reverts commit 802f5cd105.
* Revert "[ConstraintSystem] Narrowly disable `tryOptimizeGenericDisjunction` when some of the arguments are number literals"
This reverts commit 8d5cb112ef.
* Revert "[CSOptimizer] Infer argument candidates from calls to `Double` and CGFloat constructors"
This reverts commit f2a6677a6d.
* Revert "[CSOptimizer] Score all of the overload choices matching on literals uniformly"
This reverts commit 59109c2d60.
* Revert "[CSOptimizer] Enable ranking of `Int*`, `Float{80}` and `Double` initializers"
This reverts commit 6fb6d1cf90.
* Revert "[CSOptimizer] Rank disjunctions based on score only if both sides are supported"
This reverts commit 8818d399f9.
* Revert "[CSOptimizer] Rank results of operators regardless of whether anything is known about parameters"
This reverts commit 3996b25fbd.
* Revert "[Tests] NFC: Add more test-cases that were previously solved due to old hacks behavior"
This reverts commit d0ff6c81b8.
* Revert "[CSOptimizer] Average score should reflect number of defaulted parameters"
This reverts commit 23589add74.
* Revert "[Tests] NFC: Adjust a couple of improved tests"
This reverts commit 66981364fe.
* Revert "[CSOptimizer] Don't optimize (implicit) calls with code completion arguments"
This reverts commit 8a918e2369.
* Revert "[CSOptimizer] attempt to rank only standard/simd operators and fully concrete overload sets"
This reverts commit deca9b61c5.
* Revert "[CSOptimizer] Record best scores for each disjunction and use them in `selectDisjunction`"
This reverts commit 3819ddfb40.
* Revert "[CSOptimizer] Let `determineBestChoicesInContext` return the best disjunction if one is available"
This reverts commit cf05405eae.
* Revert "[CSOptimizer] Emulate old behavior related to favoring of unary calls to members"
This reverts commit 527de22bec.
* Revert "[Tests] NFC: Add a test-case for rdar://133340307 which is now fast"
This reverts commit 670127abd6.
* Revert "[CSOptimizer] Prefer homogeneous arithmetic operator overloads when argument(s) or result match"
This reverts commit d69b6a0594.
* Revert "[CSOptimizer] Remove an outdated optimization to compare resolved argument types with all else equal"
This reverts commit 1760bd1f1e.
* Revert "[CSOptimizer] NFC: Switch from llvm::Optional to std::optional post-rebase"
This reverts commit c429f5b9ec.
* Revert "[CSOptimizer] Increase score when type matches opaque type"
This reverts commit 2869dff995.
* Revert "[CSOptimizer] NFC: Switch to llvm::Optional"
This reverts commit 0fc6806922.
* Revert "[CSOptimizer] NFC: Adjust conformance check to use `ConstraintSystem::lookupConformance`"
This reverts commit da65333d41.
* Revert "[CSOptimizer] Treat all type parameters equally"
This reverts commit 957a5f4270.
* Revert "[CSStep] Remove disjunction pruning logic from DisjunctionStep"
This reverts commit 2c44e37948.
* Revert "[CSOptimizer] Relax candidate type requirements from equality to set of no-impact conversions"
This reverts commit 11b897b32f.
* Revert "[CSOptimizer] Use `matchCallArguments` to establish argument-to-parameter relationships"
This reverts commit cb1cb2018d.
* Revert "[CSOptimizer] Don't attempt to optimize calls with code completion token(s) in argument position"
This reverts commit 14e2a16fce.
* Revert "[CSOptimizer] Allow generic operator overloads without associated type parameters"
This reverts commit bc5f70a9a3.
* Revert "[CSOptimizer] Make sure that all parameters without arguments are defaulted"
This reverts commit 7c1c46d4e4.
* Revert "[CSStep] Don't favor choices until the disjunction is picked"
This reverts commit e404ed722a.
* Revert "[CSOptimizer] Keep track of mismatches while evaluating candidates"
This reverts commit a094c3ebb0.
* Revert "[CSOptimizer] Favor SIMD related arithmetic operator choices if argument is SIMD<N> type"
This reverts commit c2f7451c7b.
* Revert "[CSOptimizer] Initial implementation of disjunction choice favoring algorithm"
This reverts commit 672ae3d252.
* Revert "[ConstraintSystem] Add skeleton of constraint optimizer"
This reverts commit b5f08a4009.
* Revert "[CSGen] Remove ConstraintOptimizer and all favoring logic"
This reverts commit 4432c51f57.
* Revert "[ConstraintSystem] Remove `shrink`"
This reverts commit 757ca24e8a.
* [TypeChecker] NFC: Remove resurrected use of `SolverShrinkUnsolvedThreshold`
* [TypeChecker] Bring back `SolverDisableShrink`
* [Tests] NFC: Mark tests affected by solver-perf revert as slow
* [Tests] NFC: Adjust async tests that are affected by performance hacks
https://github.com/swiftlang/swift/pull/72659 turned out to have some
source compatibility fallout that we need to fix. Instead of introducing
yet another brittle compatibility hack, stop emitting errors about a
missing `any` altogether until a future language mode.
Besides resolving the compatibility issue, this will encourage
developers to adopt any sooner and grant us ample time to gracefully
address any remaining bugs before the source compatibility burden
resurfaces.
A subsequent commit adds a diagnostic group that will allow users to
escalate these warnings to errors with `-Werror ExistentialAny`.
This workaround is no longer needed because `TypeAliasType` is now
modeled using generic arguments (as opposed to a substitution map).
Previously, computing the substitution map in `StructuralTypeRequest` to
construct the resulting `TypeAliasType` could cause a request cycle
around generic signature computation.
Instead of canonicalizing platform versions during parsing and storing two
versions, just canonicalize the parsed version on-demand when its requested.
Warnings about unsafe uses due to an @unsafe IteratorProtocol conformance
(for the implicit call to next()) could not be silenced. Follow the same
path we did for the Sequence conformance (and makeIterator() call) by
associating it with the `unsafe` on the sequence argument.
This isn't the only solution here, but it's a reasonable one.
