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[SR-4347] default to Any? instead of Any if there is a nil literal

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This commit is contained in:
Toni Suter
2017-04-02 13:26:13 +02:00
parent 3d116799d6
commit 09a56c16fd
3 changed files with 43 additions and 24 deletions
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24
test/Constraints/array_literal.swift
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@@ -121,7 +121,7 @@ class A { }
class B : A { }
class C : A { }
/// Check for defaulting the element type to 'Any'.
/// Check for defaulting the element type to 'Any' / 'Any?'.
func defaultToAny(i: Int, s: String) {
let a1 = [1, "a", 3.5]
// expected-error@-1{{heterogeneous collection literal could only be inferred to '[Any]'; add explicit type annotation if this is intentional}}
@@ -129,20 +129,30 @@ func defaultToAny(i: Int, s: String) {
let a2: Array = [1, "a", 3.5]
// expected-error@-1{{heterogeneous collection literal could only be inferred to '[Any]'; add explicit type annotation if this is intentional}}
let _: Int = a2 // expected-error{{value of type '[Any]'}}
let a3 = [1, "a", nil, 3.5]
// expected-error@-1{{heterogeneous collection literal could only be inferred to '[Any?]'; add explicit type annotation if this is intentional}}
let _: Int = a3 // expected-error{{value of type '[Any?]'}}
let a4: Array = [1, "a", nil, 3.5]
// expected-error@-1{{heterogeneous collection literal could only be inferred to '[Any?]'; add explicit type annotation if this is intentional}}
let _: Int = a4 // expected-error{{value of type '[Any?]'}}
let a3 = []
let a5 = []
// expected-error@-1{{empty collection literal requires an explicit type}}
let _: Int = a3 // expected-error{{value of type '[Any]'}}
let _: Int = a5 // expected-error{{value of type '[Any]'}}
let _: [Any] = [1, "a", 3.5]
let _: [Any] = [1, "a", [3.5, 3.7, 3.9]]
let _: [Any] = [1, "a", [3.5, "b", 3]]
let _: [Any?] = [1, "a", nil, 3.5]
let _: [Any?] = [1, "a", nil, [3.5, 3.7, 3.9]]
let _: [Any?] = [1, "a", nil, [3.5, "b", nil]]
let a4 = [B(), C()]
let _: Int = a4 // expected-error{{value of type '[A]'}}
let a6 = [B(), C()]
let _: Int = a6 // expected-error{{value of type '[A]'}}
}
/// Check handling of 'nil'.