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c30845fa74
Introduce a fix to detect and diagnose situations when omitted
generic arguments couldn't be deduced by the solver based on
the enclosing context.
Example:
```swift
struct S<T> {
}
_ = S() // There is not enough context to deduce `T`
```
Resolves: rdar://problem/51203824
15 lines
647 B
Swift
15 lines
647 B
Swift
// RUN: %target-typecheck-verify-swift
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struct MyCollection<Element> { // expected-note {{'Element' declared as parameter to type 'MyCollection'}}
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func map<T>(_ transform: (Element) -> T) -> MyCollection<T> { // expected-note 2 {{in call to function 'map'}}
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fatalError("implement")
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}
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}
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MyCollection.map // expected-error{{generic parameter 'Element' could not be inferred}} expected-note {{explicitly specify the generic arguments to fix this issue}} {{13-13=<Any>}}
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// expected-error@-1 {{generic parameter 'T' could not be inferred}}
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let a = MyCollection<Int>()
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a.map // expected-error{{generic parameter 'T' could not be inferred}}
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