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4c09ef61e3
Implement the syntax 'if x then y else z', which evaluates to 'y' if 'x' is true or 'z' if 'x' is false. 'x' must be a valid logic value, and 'y' and 'z' must be implicitly convertible to a common type. Swift SVN r4407
52 lines
1.1 KiB
Swift
52 lines
1.1 KiB
Swift
// RUN: %swift %s -verify
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struct MyLogicValue {
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func getLogicValue() -> Bool {
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return true
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}
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}
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func useInt(x:Int) {}
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func useDouble(x:Double) {}
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class B {}
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class D1 : B {}
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class D2 : B {}
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func useB(x:B) {}
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func useD1(x:D1) {}
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func useD2(x:D2) {}
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var a = if true then 1 else 0 // should infer Int
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var b : Double = if true then 1 else 0 // should infer Double
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var c = if true then 1 else 0.0 // should infer Double
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var d = if true then 1.0 else 0 // should infer Double
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useInt(a)
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useDouble(b)
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useDouble(c)
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useDouble(d)
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var z = if true then a else b // expected-error{{}}
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var e = if true then new B else new B // should infer B
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var f = if true then new B else new D1 // should infer B
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var g = if true then new D1 else new B // should infer B
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var h = if true then new D1 else new D1 // should infer D1
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var i = if true then new D1 else new D2 // should infer B
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useB(e)
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useD1(e) // expected-error{{}}
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useB(f)
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useD1(f) // expected-error{{}}
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useB(g)
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useD1(g) // expected-error{{}}
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useB(h)
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useD1(h)
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useB(i)
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useD1(i) // expected-error{{}}
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useD2(i) // expected-error{{}}
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var x = if MyLogicValue() then 1 else 0
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var y = if 22 then 1 else 0 // expected-error{{}}
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