Missing API functionality of MemberMacro?

[庄黛淳华]

Hi I am learning MemberMacro , I don't know why _storage is defined in here

swift-macro-examples/MacroExamplesLib/Macros.swift

Line 47 in 9548af5

 @attached(member, names: named(_storage)) 

but DictionaryIndirectionMacro.swift use string constants:

swift-macro-examples/MacroExamplesPlugin/DictionaryIndirectionMacro.swift

Line 57 in 9548af5

 let storage: DeclSyntax = "var _storage: [String: Any] = [:]" 

I also don't find "_storage" in AttributeSyntax or DeclGroupSyntax, is this a missing API function or is "named(_storage)" just not useful?

Thanks!

[庄黛淳华]

Forgot to say, I test it with XCTestCase

[Doug Gregor]

The reasons for the named(_storage) here are described in the proposal for attached macros.