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bebbdfe001
We now produce diagnostics like: - cannot pass 'let' value 'a' to mutating unary operator '++' - cannot pass get-only property 'b' to mutating unary operator '++' - cannot pass immutable value of type 'Int64' to mutating unary operator '++' Swift SVN r27772
46 lines
1.4 KiB
Swift
46 lines
1.4 KiB
Swift
// RUN: %target-parse-verify-swift
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struct S {
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var x: Int = 0
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let y: Int = 0
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mutating func mutateS() {}
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init() {}
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}
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struct T {
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var mutS: S? = nil
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let immS: S? = nil
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mutating func mutateT() {}
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init() {}
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}
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var mutT: T?
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let immT: T? = nil
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mutT?.mutateT()
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immT?.mutateT() // expected-error{{only has mutating members}}
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mutT?.mutS?.mutateS()
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mutT?.immS?.mutateS() // expected-error{{only has mutating members}}
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mutT?.mutS?.x++
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mutT?.mutS?.y++ // expected-error{{could not find an overload for '++' that accepts the supplied arguments}}
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// Prefix operators don't chain
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++mutT?.mutS?.x // expected-error{{cannot pass immutable value of type 'Int?' to mutating unary operator '++'}}
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++mutT?.mutS?.y // expected-error{{cannot pass immutable value of type 'Int?' to mutating unary operator '++'}}
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// TODO: assignment operators
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mutT? = T()
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mutT?.mutS = S()
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mutT?.mutS? = S()
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mutT?.mutS?.x += 0
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_ = mutT?.mutS?.x + 0 // expected-error{{value of optional type 'Int?' not unwrapped}}
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mutT?.mutS?.y -= 0 // expected-error{{could not find an overload for '-=' that accepts the supplied arguments}}
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mutT?.immS = S() // expected-error{{cannot assign}}
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mutT?.immS? = S() // expected-error{{cannot assign}}
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mutT?.immS?.x += 0 // expected-error{{could not find an overload for '+=' that accepts the supplied arguments}}
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mutT?.immS?.y -= 0 // expected-error{{could not find an overload for '-=' that accepts the supplied arguments}}
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