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299 Commits

Author SHA1 Message Date
Pavel Yaskevich
f3ff87b6f4 [Diagnostics] Diagnose re-labeling failures in ambiguity conditions 
If all solutions point to the same overload choice that needs
re-labeling it's safe to diagnose it as if there was no ambiguity
because the call site is static.
 2022-05-13 14:25:14 -07:00
Josh Soref
4c77c59269 Spelling sema (#42474) 
* spelling: accessibility

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* spelling: similar

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* spelling: sure

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* spelling: symmetric

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* spelling: syntactically

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Co-authored-by: Josh Soref <jsoref@users.noreply.github.com>
 2022-04-20 15:12:46 -07:00
Luciano Almeida
99f1704873 [CSFix] Create a fix for checked cast that always fail and existential to CFType 2022-04-13 22:13:48 -03:00
Xi Ge
6206d7cc9d sema: accept an array literal of enum case references as compile-time constant 2022-03-24 21:44:09 -07:00
Xi Ge
000a41d6f7 sema: reject enum element call with payloads as compile-time constant 
rdar://90168664
 2022-03-12 10:04:28 -08:00
Pavel Yaskevich
82b955b93c [CSDiagnostics] Detect and diagnose contextual mismatches with default value 2022-02-21 09:59:54 -08:00
Doug Gregor
365f0afa9f Downgrade concurrency-related function type errors in existing code 
When in "existing" Swift code that is Swift 5.x and has not adopted
concurrency, allow mismatches in function types that only involve
ABI-neutral concurrency changes (e.g., adding `@Sendable` or removing
a global actor) by downgrading the diagnostic to a warning. This
improves the story for incremental adoption of concurrency in an
existing code base.

As part of this, generalize the facility for downgrading an error to a
warning when performing diagnostics in the constraint solver, using the
new diagnostic behavior limits rather than duplicating diagnostics.
 2021-12-02 10:33:01 -08:00
Xi Ge
4b0fc14a5e Merge pull request #40333 from nkcsgexi/enum-element-constness 
sema: accept enum element reference as compile-time const value
 2021-11-30 14:13:11 -08:00
Xi Ge
fdcb08ead2 sema: accept enum element reference as compile-time const value 2021-11-30 09:27:42 -08:00
Saleem Abdulrasool
349af3707d Merge pull request #40305 from compnerd/semitruck 
gardening: make c++98-compat-extra-semi an error
 2021-11-30 08:18:36 -08:00
Saleem Abdulrasool
910fbee14e gardening: make c++98-compat-extra-semi an error 
This cleans up 90 instances of this warning and reduces the build spew
when building on Linux.  This helps identify actual issues when
building which can get lost in the stream of warning messages.  It also
helps restore the ability to build the compiler with gcc.
 2021-11-27 11:40:17 -08:00
Xi Ge
03c76bd32d sema: diagnose passing a non-constant value into a constant parameter 2021-11-22 11:52:57 -08:00
Hamish Knight
4aaec65780 [CS] Warn on mismatched tuple labels for subtyping 
This is something that we'd like to fix to bring
in line with tuple conversion, so start warning on
cases where it occurs.
 2021-11-17 17:06:21 +00:00
Pavel Yaskevich
4343227d19 [Diagnostics] Determine affected elements early in collection element mismatches 
Diagnostics cannot assume that solution would always be applied
to the constraint system, so all of the elements affected by the
mismatch have to be determined by the fix.

Resolves: rdar://85021348
 2021-11-12 10:10:44 -08:00
Pavel Yaskevich
0c70f5650f Merge pull request #39592 from Jumhyn/contextual-placeholder-followup 
Remove default argument from getContextualType
 2021-11-08 10:00:36 -08:00
Frederick Kellison-Linn
b433724735 Remove default argument from getContextualType 2021-10-05 17:04:54 -04:00
Pavel Yaskevich
de35114171 [Diagnostics] Add a tailored diagnostic for Swift -> C pointer conversion 
Diagnose situations where Swift -> C pointer implicit conversion
is attempted on a Swift function instead of one imported from C header.

```swift
func test(_: UnsafePointer<UInt8>) {}

func pass_ptr(ptr: UnsafeRawPointer) {
  test(ptr) // Only okay if `test` was an imported C function.
}
```
 2021-09-20 17:22:26 -07:00
Pavel Yaskevich
f53bcea60c [CSFix] Add a tailored fix for invalid Swift -> C pointer conversions 
This is a skeleton of a fix that would be used to diagnose situations
when Swift -> C pointer conversion was attempted on a Swift function.
 2021-09-20 17:22:26 -07:00
Pavel Yaskevich
0a425480d0 [CSFix] NFC: Rename fix/diagnostic for checked casts that always succeed 2021-09-10 13:55:15 -07:00
Pavel Yaskevich
60d931612c [Dignostics] Diagnose weak declarations with non-optional types 
Diagnose situations where `weak` attribute is used with a non-optional type
in declaration e.g. `weak var x: <Type>`:

```swift
class X {
}

weak var x: X = ...
```

`weak` declaration is required to use an optional type e.g. `X?`.
 2021-09-07 17:36:56 -07:00
Pavel Yaskevich
3fac0fefc9 [CSFix] Add a skeleton of weak pattern with non-optional type fix 2021-09-07 17:36:56 -07:00
Frederick Kellison-Linn
5f07747cb3 [Sema] Diagnose user-specified placeholders which couldn’t be resolved 2021-08-19 14:53:33 -04:00
Hamish Knight
7f1f092afa [CS] Remove a case from getStructuralTypeContext 
This was only needed for to handle tuple
construction, but is no longer needed now that we
retrieve the context info from the locator.
 2021-07-27 11:18:13 +01:00
Holly Borla
d083c66686 [ConstraintSystem] Before matching tuple types, add each complete tuple 
type to the locator.

This will provide context for tuple element mismatch diagnostics, instead
of attempting to compute the full tuple type in diagnostics code with a pile
of special cases (see getStructuralTypeContext in CSFix.cpp).
 2021-06-24 09:40:14 -07:00
Luciano Almeida
308d104f70 [Sema] [Diagnostics] Consider function result locator when get structural contextual type for function arg/param 2021-05-31 00:07:47 -03:00
Holly Borla
e1591314cf Merge pull request #37380 from hborla/property-wrapper-inference-crash 
[ConstraintSystem] Fix a constraint system crash with property wrapper inference using the $ syntax.
 2021-05-12 08:55:51 -07:00
Holly Borla
c297070106 [Diagnostics] Always use the parameter name for closure parameter diagnostics, 
because the $ prefix does not indicate that the parameter is anonymous.
 2021-05-11 18:30:27 -07:00
Pavel Yaskevich
ddfaf80181 Merge pull request #37347 from xedin/rdar-77700261 
[CSFix] Suppress ambiguity warning about non-`Optional` base with sta…
 2021-05-11 10:13:14 -07:00
Pavel Yaskevich
a3fe65d87e [CSFix] Suppress ambiguity warning about non-Optional base with static member lookup 
Disable non-Optional "assumption" warning for ambiguities related to a
static member lookup in generic context because it's possible to declare
a member with the same name on a concrete type and in an extension of a
protocol that type conforms to e.g.:

```swift
struct S : P { static var test: S { ... }

extension P where Self == S { static var test: { ... } }
```

And use that in an optional context e.g. passing `.test`
to a parameter of expecting `S?`.

Resolves: rdar://77700261
 2021-05-10 12:52:26 -07:00
Pavel Yaskevich
4b0d9a2509 [ResultBuilders] Diagnose pre-check errors inline 
Not all of the pre-check errors could be diagnosed by re-running
`PreCheckExpression` e.g. key path expressions are mutated to
a particular form after an error has been produced.

To make the behavior consistent, let's allow pre-check to emit
diagnostics and unify pre-check and constraint generation fixes.

Resolves: rdar://77466241
 2021-05-10 11:06:58 -07:00
Pavel Yaskevich
71372bce67 [Diagnostics] Switch to use contextual purpose associated with locator 
`ContextualFailure` is the main beneficiary of additional information
associated with `ContextualType` element because it no longer has to
query solution for "purpose" of the contextual information.

Resolves: rdar://68795727
 2021-04-26 09:51:25 -07:00
Pavel Yaskevich
51ff12d06e [ConstraintLocator] Augment ContextualType element to carry its purpose 
Having purpose attached to the contextual type element makes it much
easier to diagnose contextual mismatches without involving constraint
system state.
 2021-04-26 09:51:21 -07:00
Strieker
4e2b67cbae [NFC] Resolved merge conflict in CSSimplify.cpp after making changes to improve error handling for composed wrapped value mismatches 2021-04-22 11:49:21 -07:00
Strieker
c9b53ec66f [ConstraintSystem] Created a locator in CSGen to store the location where the wrappedValue type of a property wrapper was determined and added necessary logic so that a constraint locator can recognize a composed property wrapper’s wrapped value type in CSFix.cpp, CSFix.h, and CSSimplify.cpp. 2021-04-22 11:31:41 -07:00
Pavel Yaskevich
22a231e4d8 [Diagnostics] Allow result build to detect ErrorExprs in the body 
We assume that presence of `ErrorExpr` means that the problem has
been diagnosed early (i.e. by parser), so the fix is going to return
`true` if diagnostic engine has emitted an error.

Resolves: rdar://76246526
 2021-04-09 16:42:59 -07:00
Holly Borla
76c4c3dc3f [Diagnostics] Add back a dedicated fix/diagnostic for using an invalid 
type as a property wrapper.
 2021-03-24 11:24:21 -07:00
Holly Borla
f05589f6c4 [Diagnostics] Improve diagnostics for passing an invalid projected 
value argument.
 2021-03-24 11:24:21 -07:00
Doug Gregor
52096a640e SE-0302: Rename ConcurrentValue/@concurrent to Sendable/@Sendable. 2021-03-18 23:48:21 -07:00
Doug Gregor
d6fc1fd60f Implement conversions for global-actor-qualified functions. 
One can convert from a function value without a global actor to a
similar function type that does have a global actor, but one cannot
remove or change a global actor on a function type.
 2021-03-17 00:51:26 -07:00
Holly Borla
133dec0e05 [ConstraintSystem] Implement implicit property wrapper attribute 
inference for closure parameters.
 2021-02-25 18:35:14 -08:00
Holly Borla
ea3fe03c98 [Property Wrappers] Add a constraint fix and diagnostic for the case 
where the programmer tries to pass a projection argument to a wrapped
parameter without 'var projectedValue'.
 2021-02-25 18:35:14 -08:00
Pavel Yaskevich
03d869ad8b [Diagnostics] Extract invalid result type from overload choice 
Instead of threading it through the constraint system all the way
to a diagnostic, let's extract it from overload choice instead.
 2021-02-23 11:33:10 -08:00
Pavel Yaskevich
9231acf202 [Diagnostics] Implement a tailored diagnostic for invalid static member refs on protocol metatypes 2021-02-23 11:32:24 -08:00
Pavel Yaskevich
eaabd24746 [CSFix] Add a new fix to diagnose invalid static member refs on protocol metatype 2021-02-23 11:32:24 -08:00
Pavel Yaskevich
2274e17843 [CSFix] Allow diagnosing the same out-of-order argument in ambiguity cases 
Is the same argument is out-of-order in multiple solutions, let's
diagnose it as if there was no ambiguity.

Resolves: SR-14093
Resolves: rdar://73600328
 2021-02-18 17:21:49 -08:00
Pavel Yaskevich
1b7795b5e3 [CSFix] Allow diagnosing invalid references in key path with multiple solutions 
If multiple solutions have exactly a fix for exactly the same invalid member
reference in key path, let's diagnose that as if there is no ambiguity there.
 2021-02-18 17:21:37 -08:00
Pavel Yaskevich
a7524e59f4 [CSFix] Allow diagnosing missing conformance in ambiguity cases 
It's possible that different overload choices could have the same
conformance requirement, so diagnostics should be able to emit an
error in situations where multiple solutions point to the missing
conformance at the same location (both in AST and requirement list).

Resolves: rdar://74447308
 2021-02-18 17:21:03 -08:00
Luciano Almeida
d55eed46e8 [Sema][CSApply] Moving some checked cast diagnostics to a fix format (#34980) 
* [Sema] Implementing is runtime check always true diagnostic as a fix

* [AST] Implement getWithoutThrows on function type

* [CSSimplify] Detect that checked cast types conversion is always true and record warning fix

* [test] Some additional test cases for SR-13789

* [Sema] Fixing typo on fix name

* [Sema] Move and adjust the ConditionalCast diagnostics to the fix format

* [Sema] Remove some checked cast diagnostics from check constraints and move to fix

* [Sema] Renaming checked cast coercible types fix

* [Sema] Some adjustments and rewrite on the logic for downcast record fix

* [Sema] Move logic of runtime function type to AllowUnsupportedRuntimeCheckedCast::attempt

* [Sema] Abstract checked cast fix logic to static function and minor adjustments

* [Sema] Renamings from review
 2021-02-10 08:31:06 -03:00
Doug Gregor
ba8819eb58 [Concurrent] Introduce concurrent function types. 
Introduce `@concurrent` attribute on function types, including:
* Parsing as a type attribute
* (De-/re-/)mangling for concurrent function types
* Implicit conversion from @concurrent to non-@concurrent
- (De-)serialization for concurrent function types
- AST printing and dumping support
 2021-01-27 14:22:32 -08:00
Luciano Almeida
e4d4c0b32e [Sema] Moving detection of fix base type for optional member to attempt fix method 2020-12-08 00:19:39 -03:00