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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
28 lines
544 B
Swift
28 lines
544 B
Swift
// RUN: %target-typecheck-verify-swift
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// Simple enumeration type
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enum E1 {
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case First
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case Second(Int)
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case Third(Int, Double)
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case `default`
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}
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var e1: E1 = .First
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e1 = .Second(5)
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e1 = .Third(5, 3.14159)
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e1 = .default // SE-0071
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// Generic enumeration type
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enum E2<T> { // expected-note {{'T' declared as parameter to type 'E2'}}
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case First
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case Second(T)
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}
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var e2a: E2<Int> = .First
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e2a = .Second(5)
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var e2b: E2 = .Second(5)
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e2b = .First
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var e2c: E2 = .First // expected-error{{generic parameter 'T' could not be inferred}}
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