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288a7765fc
If constraint system is underconstrained e.g. because there are
editor placeholders, it's possible to end up with multiple solutions
where each ambiguous declaration is going to have its own overload kind:
```swift
func foo(_: Int) -> [Int] { ... }
func foo(_: Double) -> (result: String, count: Int) { ... }
_ = foo(<#arg#>).count
```
In this case solver would produce 2 solutions: one where `count`
is a property reference on `[Int]` and another one is tuple access
for a `count:` element.
Resolves: rdar://problem/49712598
39 lines
1.7 KiB
Swift
39 lines
1.7 KiB
Swift
// RUN: %target-typecheck-verify-swift
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func foo(_ x: Int) -> Int {}
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func foo(_ x: Float) -> Float {}
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var v = foo(<#T##x: Float##Float#>) // expected-error {{editor placeholder}}
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v = "" // expected-error {{cannot assign value of type 'String' to type 'Float'}}
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if (true) {
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<#code#> // expected-error {{editor placeholder}}
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}
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foo(<#T##x: Undeclared##Undeclared#>) // expected-error {{editor placeholder}} expected-error {{use of undeclared type 'Undeclared'}}
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func f(_ n: Int) {}
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let a1 = <#T#> // expected-error{{editor placeholder in source file}}
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f(a1) // expected-error{{cannot convert value of type '()' to expected argument type 'Int'}}
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let a2 = <#T##Int#> // expected-error{{editor placeholder in source file}}
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f(a2)
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<#T#> // expected-error{{editor placeholder in source file}}
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// FIXME: <rdar://problem/22432828> Lexer yields "editor placeholder in source file" error twice when placeholder is first token
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_ = <#T##Int#> // expected-error {{editor placeholder in source file}}
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f(<#T#> + 1) // expected-error{{editor placeholder in source file}}
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f(<#T##Int#>) // expected-error{{editor placeholder in source file}}
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f(<#T##String#>) // expected-error{{editor placeholder in source file}} expected-error{{cannot convert value of type 'String' to expected argument type 'Int'}}
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for x in <#T#> { // expected-error{{editor placeholder in source file}} expected-error{{for-in loop requires '()' to conform to 'Sequence'}}
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}
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// rdar://problem/49712598 - crash while trying to rank solutions with different kinds of overloads
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func test_ambiguity_with_placeholders(pairs: [(rank: Int, count: Int)]) -> Bool {
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return pairs[<#^ARG^#>].count == 2
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// expected-error@-1 {{editor placeholder in source file}}
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// expected-error@-2 {{ambiguous use of 'subscript(_:)'}}
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}
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