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404 Commits

Author SHA1 Message Date
Hamish Knight
c56ea461b6 [Sema] Add fix-it to import RegexBuilder 
For code such as the following:

```
let r = Regex {
  /abc/
}
```

If RegexBuilder has not been imported, emit a
specialized diagnostic and fix-it to add
`import RegexBuilder` to the file.

Unfortunately we're currently prevented from
emitting the specialized diagnostic in cases where
the builder contains references to RegexBuilder
types, such as:

```
let r = Regex {
  Capture {
    /abc/
  }
}
```

This is due to the fact that we bail from CSGen
due to the reference to `Capture` being turned
into an `ErrorExpr`. We ought to be able to
handle solving in the presence of such errors, but
for now I'm leaving it as future work.

rdar://93176036
 2022-06-28 11:38:41 +01:00
Holly Borla
429488f6c9 [Sema] Use ExistentialType for Any and AnyObject. 2022-06-17 18:29:15 -07:00
Pavel Yaskevich
62ba74950c [Diagnostics] Diagnose conflicting pattern variables 
Diagnose situations where pattern variables with the same name
have conflicting types:

```swift
enum E {
case a(Int)
case b(String)
}

func test(e: E) {
  switch e {
  case .a(let x), .b(let x): ...
  }
}
```

In this example `x` is bound to `Int` and `String` at the same
time which is incorrect.
 2022-06-03 16:31:27 -07:00
Pavel Yaskevich
6edab6a9a6 [Diagnostics] Prevent fix-it for explicit existential erasure from suppressing opening at use site 
If erased result is passed as an argument to a call that requires
implicit opening, the fix-it should use parens to avoid suppressing
the opening at that argument position.
 2022-05-26 15:34:07 -07:00
Pavel Yaskevich
0e70841d5f [Diagnostics] Diagnose returning existential values that lose requirements 
Diagnose situations where inferring existential type for result of
a call would result in loss of generic requirements.

```swift
protocol P {
  associatedtype A
}

protocol Q {
 associatedtype B: P where B.A == Int
}

func getB<T: Q>(_: T) -> T.B { ... }

func test(v: any Q) {
  let _ = getB(v) // <- produces `any P` which looses A == Int
}
```
 2022-05-25 16:07:05 -07:00
Pavel Yaskevich
dfadee3731 [CSDiagnostics] Attach missing member diagnostic to a pattern/statement 
If missing member is found in e.g. case statement or a pattern,
let's attach diagnostic directly to it.
 2022-05-18 00:28:08 -07:00
Josh Soref
4c77c59269 Spelling sema (#42474) 
* spelling: accessibility

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* spelling: accessories

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* spelling: adjustments

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* spelling: all

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* spelling: ambiguous

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* spelling: arguments

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* spelling: assignment

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* spelling: associated

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* spelling: assumes

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* spelling: auxiliary

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* spelling: availability

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* spelling: available

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* spelling: belongs

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* spelling: checking

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* spelling: clazz

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* spelling: compatibility

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* spelling: completely

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* spelling: completion

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* spelling: complicated

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* spelling: conformance

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* spelling: constrained

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* spelling: constraint

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* spelling: contextual

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* spelling: conversion

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* spelling: convertible

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* spelling: couldn't

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* spelling: declaration

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* spelling: defaultable

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* spelling: dependent

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* spelling: depending

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* spelling: describe

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* spelling: diagnostic

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* spelling: diagnostics

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* spelling: existential

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* spelling: expects

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* spelling: explicit

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* spelling: explicitly

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* spelling: expression

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* spelling: first

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* spelling: font

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* spelling: forward

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* spelling: generation

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* spelling: generic

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* spelling: given

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* spelling: global

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* spelling: guarantee

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* spelling: happened

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* spelling: hierarchy

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* spelling: identical

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* spelling: immediately

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* spelling: implicit

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* spelling: indicates

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* spelling: inferred

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* spelling: initialization

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* spelling: initialize

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* spelling: initializer

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* spelling: integrity

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* spelling: interpolation

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* spelling: introducing

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* spelling: involved

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* spelling: just

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* spelling: like

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* spelling: likewise

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* spelling: mismatch

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* spelling: missing

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* spelling: more

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* spelling: necessarily

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* spelling: noescape

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* spelling: nonetheless

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* spelling: occurrences

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* spelling: operators

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* spelling: optional

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* spelling: otherwise

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* spelling: outside

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* spelling: overload

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* spelling: overridden

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* spelling: override

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* spelling: parameter

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* spelling: parameters

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* spelling: penalize

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* spelling: platforms

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* spelling: precedence

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* spelling: preemptively

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* spelling: preliminary

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* spelling: preserve

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* spelling: propagate

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* spelling: propagated

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* spelling: qualifier

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* spelling: question

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* spelling: really

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* spelling: received

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* spelling: references

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* spelling: replaceable

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* spelling: replacement

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* spelling: representable

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* spelling: representative

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* spelling: requirement

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* spelling: requires

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* spelling: resolved

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* spelling: retrieve

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* spelling: rewriting

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* spelling: satisfied

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* spelling: semantics

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* spelling: signature

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* spelling: similar

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* spelling: simplest

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* spelling: simplification

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* spelling: solver

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* spelling: struct

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* spelling: structurally

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* spelling: success

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* spelling: sure

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* spelling: symmetric

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* spelling: syntactically

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* spelling: target

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* spelling: that

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* spelling: the

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* spelling: themselves

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* spelling: these

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* spelling: this

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* spelling: transform

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* spelling: transparent

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* spelling: tread

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* spelling: truncation

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* spelling: type

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* spelling: unconstructable

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* spelling: universally

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* spelling: unknown

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* spelling: unwrapped

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* spelling: versioned

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* spelling: visible

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* spelling: where

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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
Pavel Yaskevich
82b955b93c [CSDiagnostics] Detect and diagnose contextual mismatches with default value 2022-02-21 09:59:54 -08:00
Anthony Latsis
c47f99a22d Diag: Use 'Self'-rooted interface types instead of opened archetypes in requirement failure messages 2022-02-02 02:10:05 +03:00
Doug Gregor
c0f5502269 Leverage error-to-warnings downgrades for non-ephemeral conversion diagnostics 
There were slight wording changes between the warning and error
diagnostics, but they don't seem to justify the duplication here.
 2021-12-02 11:12:07 -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
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
Pavel Yaskevich
84fa8a35e6 [Sema] Fix unused function/variable warnings in no-assertion configuration 2021-10-15 13:22:44 -07:00
Pavel Yaskevich
1c0a306c75 Merge pull request #37956 from xedin/implicit-swift-to-c-ptr-conversions 
[TypeChecker] Implement limited set of conversions between Swift and C pointers
 2021-10-06 14:35:22 -07:00
Frederick Kellison-Linn
b433724735 Remove default argument from getContextualType 2021-10-05 17:04:54 -04:00
Konrad `ktoso` Malawski
703595e396 [Concurrent] Warnings/errors should use "sendable" not "concurrent" 
Resolves rdar://83416205
 2021-09-23 12:45:07 +09:00
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
a061a966d1 Merge pull request #39251 from xedin/classof-for-fixes 
[CSFix] Add support for `classof` for all fixes
 2021-09-20 14:33:06 -07:00
Pavel Yaskevich
bd7d2125b7 Merge pull request #39261 from JiarenWang/wjr 
[Compiler] add 'value' label for `NSNumber` to prevent roundabout err…
 2021-09-16 10:17:38 -07:00
jiaren wang
391c6e07ad [Compiler] add 'value' label for NSNumber to prevent roundabout error message. 2021-09-15 23:23:41 +08:00
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
Holly Borla
03777c3fc9 [Diagnostics] Remove ContextualFailure::diagnoseMissingFunctionCall. 
Instead, always diagnose missing call errors via MissingCallFailure.
 2021-09-06 20:05:13 -07:00
Holly Borla
9d0d521457 [Diagnostics] Diagnose associated value pattern matching errors separately 
from missing function call errors in `ContextualFailure`.

It doesn't make sense to diagnose pattern matching errors inside of
`diagnoseMissingFunctionCall`, and the code I added to bail out if there
is no explicit function expression broke the pattern matching diagnostics
anyway.
 2021-09-06 19:50:00 -07:00
Hamish Knight
8c2b88abc0 [CS] Adopt ArgumentList 
- Explicitly limit favoring logic to only handle
unary args, this seems to have always been the
case, but needs to be handled explicitly now that
argument lists aren't exprs
- Update the ConstraintLocator simplification to
handle argument lists
- Store a mapping of locators to argument lists
in the constraint system
- Abstract more logic into a getArgumentLocator
method which retrieves an argument-to-param locator
from an argument anchor expr
 2021-09-01 18:40:25 +01:00
Frederick Kellison-Linn
5f07747cb3 [Sema] Diagnose user-specified placeholders which couldn’t be resolved 2021-08-19 14:53:33 -04:00
Pavel Yaskevich
0074adc6fe [Diagnostics] Result Builders: Extract pattern binding and var storage diagnostics into methods 2021-08-13 12:30:16 -07:00
Hamish Knight
21e8a320ec [CS] Better handle paren fix-its for unresolved chains 
I missed this case when previously improving the
logic here. As it turns out, using the raw anchor
as the root expression from which to derive parent
information is insufficient. This is because it
may not capture relevant parent exprs not a part
of the fix locator.

Instead, pass down a function that can be used to
derive the parent expressions from the constraint
system's own parent map. Also make sure to assign
to `expr` for the UnresolvedMemberChainResultExpr
case to make sure we correctly check for it as a
sub-expression.

Finally, now that we're looking at more parent
exprs, add logic to handle `try` and `await`
parents, as well as ClosureExprs and
CollectionExprs. I couldn't come up with a test
case for CollectionExpr, as we emit different
diagnostics in that case, but it's probably better
to tend on the side of being more future proof
there.

rdar://81512079
 2021-08-04 14:34:24 +01:00
Luciano Almeida
48792bbfdc [Sema] Add tailored diagnostic for a escapeness mismatch in a fn type parameter position 2021-06-30 06:39:04 -03:00
Pavel Yaskevich
51fe32dc1a [Diagnostics] NFC: Remove unused last argument from requirement failure notes 2021-06-25 13:44:30 -07:00
Pavel Yaskevich
fc982aec83 [Diagnostics] Use signed integer to store difference in optionality between types 
For checked cast coercion warnings let's store difference in optionality
as an `int` because it's possible that "to" type is more optional than
"from" type.
 2021-06-21 13:31:59 -07:00
Pavel Yaskevich
0d50593f68 [Diagnostics] NFC: Fix a typo in a method name: wrapedTypes -> wrappedTypes 2021-06-21 13:31:59 -07:00
Pavel Yaskevich
2a5eea6165 [Diagnostics] NFC: Add asserts to verify from/to types in contextual failure 
We have a couple of reports that `ContextualFailure` crashes in
`trySequenceSubsequenceFixIts` even with the check for a valid
stdlib was added, which can only mean that from/to types are
somehow invalid.

Let's add a couple of asserts to verify their presence to aid us
in determining what expressions can cause the problem.
 2021-05-21 14:55:17 -07:00
Slava Pestov
131d3f4bce Sema: Pass down a ModuleDecl instead of a DeclContext to conformsToProtocol() 
... and a bunch of follow-up simplifications pushing ModuleDecls further
up, since I couldn't resist the yak shave.
 2021-05-17 16:34:18 -04:00
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
Strieker
11efb7d0b3 [Diagnostics] Added new diagnostic error string for composed property wrapper mismatch in DiagnosticsSema.def and made changes to show the new composed property wrapper mismatch type diagnostic in both CSDiagnostics.cpp and CSDiagnostics.h. 2021-04-22 11:31:41 -07:00
Pavel Yaskevich
df8113b5dd [Diagnostics] Contextual mismatch should be attached to the closure if its body is empty/implicit 
If there is a contextual mismatch associated with a closure body,
make sure that the diagnostic is attached to the closure even
if the body is empty or implicit.

Resolves: rdar://52204608
 2021-04-07 10:06:34 -07:00
Holly Borla
6f4b62a93c Merge pull request #36568 from hborla/property-wrapper-constraint 
[ConstraintSystem] Add a property-wrapper constraint to allow for inference of implicit property wrappers
 2021-03-24 17:13:51 -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
Pavel Yaskevich
d7e0971764 Merge pull request #36531 from LucianoPAlmeida/SR-14096-kp-as-fn 
[Sema][SR-14096] Change conditions in which key path component mismatch fix are diagnosed
 2021-03-22 10:42:08 -07:00
Luciano Almeida
0bca6ce73c [Sema] Do not skip key path last component/value equal constraint failure fix 2021-03-21 18:29:47 -03:00
Doug Gregor
52096a640e SE-0302: Rename ConcurrentValue/@concurrent to Sendable/@Sendable. 2021-03-18 23:48:21 -07:00
Pavel Yaskevich
1dd914a651 Merge pull request #36445 from xedin/rdar-75367157 
[Diagnostics] Check whether missing conformance could be fixed by using `.rawValue`
 2021-03-17 15:24:33 -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
Pavel Yaskevich
45c73b30fd [Diagnostics] Even though missing conformance could be fixed by .rawValue still diagnose it as conformance issue 
Conformance requirement failure is a more descriptive error,
augment it with a note about missing `.rawValue`.
 2021-03-17 00:14:51 -07:00