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Implementation of the DebugDescription macro pitched on the forums: https://forums.swift.org/t/pitch-debug-description-macro/67711. In this initial commit, the macro is named `_DebugDescription` to indicate it's internal use at this time, pending Swift Evolution. rdar://115180949
22 lines
713 B
Swift
22 lines
713 B
Swift
// REQUIRES: swift_swift_parser
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// RUN: %empty-directory(%t)
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// RUN: %target-swift-frontend %s -swift-version 5 -module-name main -disable-availability-checking -typecheck -verify -plugin-path %swift-plugin-dir
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extension DefaultStringInterpolation {
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fileprivate func appendInterpolation(custom: Int) {}
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fileprivate func appendInterpolation<A, B>(_ a: A, _ b: B) {}
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}
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@_DebugDescription
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struct MyStruct1 {
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// expected-error @+1 {{unsupported custom string interpolation expression}}
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var debugDescription: String { "\(custom: 30)" }
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}
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@_DebugDescription
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struct MyStruct2 {
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// expected-error @+1 {{unsupported custom string interpolation expression}}
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var debugDescription: String { "\(30, true)" }
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}
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