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fbbbd0d08a
Allow keywords after `#` in freestanding macro expansions There is no reason why we shouldn’t allow keywords here. I also thought about allowing keywords after `@` but things become tricky here for two reasons: - In the parser, we parse a type after the `@`, which could start with a keyword itself (e.g. `any`). If we want to keep the parser logic to parse a type after `@` (which I think we should), then it becomes unclear what `@any T` should parse as. - We allow a space between `@` and the type name. This makes it very hard for recovery to tell whether `@ struct` refers to an attribute with name `struct` or if the user forgot to write the attribute name after `@`. Since almost all keywords are lowercase and attached member macros are usually spelled with an uppercase name, there are a lot fewer chances for clashes here, so I don’t think it’s worth allowing keywords after `@`. https://github.com/apple/swift/issues/66444 rdar://110472060
57 lines
1.2 KiB
Swift
57 lines
1.2 KiB
Swift
// RUN: %target-swift-frontend -parse -verify %s
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func memberwiseInit() {} // dummy symbol
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func stringify() {} // dummy symbol
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extension String {
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static let bar = #stringify(4)
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#memberwiseInit
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#memberwiseInit { "abc" }
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#memberwiseInit(flavor: .chocolate)
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#memberwiseInit(flavor: .chocolate, haha: true)
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#memberwiseInit(flavor: .chocolate, haha: true) { "abc" }
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@available(macOS 999, *)
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public #memberwiseInit()
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static internal #memberwiseInit
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struct Foo {
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#memberwiseInit
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// expected-error @+1 {{expected a macro identifier for a pound literal declaration}}
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#-
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}
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// expected-error @+1 {{expected a macro identifier for a pound literal declaration}}
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#()
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}
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@RandomAttr #someFunc
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public #someFunc
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#someFunc
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func test() {
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@discardableResult #someFunc
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dynamic #someFunc
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@CustomAttr
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isolated #someFunc
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}
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public # someFunc // expected-error {{extraneous whitespace between '#' and macro name is not permitted}} {{9-10=}}
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struct S {
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# someFunc // expected-error {{extraneous whitespace between '#' and macro name is not permitted}} {{4-5=}}
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#class
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# struct Inner {} // expected-error {{expected a macro identifier for a pound literal declaration}} expected-error {{consecutive declarations on a line}}
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}
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