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[SR-10916] DarwinCompatibility: Method call bridging behaviour on String/NSString differs between Linux and macOS #3305

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spevans opened this issue Jun 11, 2019 · 1 comment
Open

[SR-10916] DarwinCompatibility: Method call bridging behaviour on String/NSString differs between Linux and macOS #3305

spevans opened this issue Jun 11, 2019 · 1 comment
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bug Foundation

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@spevans
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spevans commented Jun 11, 2019

Previous ID SR-10916
Radar None
Original Reporter @spevans
Type Bug
Environment

Xcode 11.0 beta

Toolchain: Swift Development Snapshot 2019-06-06

macOS 10.14.5

Linux: Ubuntu18, master branch

Additional Detail from JIRA
Votes 0
Component/s Foundation
Labels Bug
Assignee None
Priority Medium

md5: 7032c235831ed1e8dcd7a24ae66eec4a

Issue Description:

The following will compile and run on Linux but fails to compile on Darwin.

import Foundation

let str = "String"
let nsstr = NSString("NSString")
print(str.isEqual(to: "String"))
print(nsstr.isEqual(to: "NSString"))

isEqual(to: ) is a method on NSString and on Linux is written in Swift, on Darwin in Objective-C.

However if the method on NSString is written in Swift, it will work on Darwin and Linux:

import Foundation

extension NSString {
    func isEqual2(to: NSString) -> Bool {
        return self == to
    }
}

let str = "String"
let nsstr = NSString("NSString")
print(str.isEqual2(to: "String"))
print(nsstr.isEqual2(to: "NSString"))
@spevans
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spevans commented Jun 11, 2019

cc @millenomi

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 5, 2022
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@spevans