Could someone who knows the generics system better than I give me a pointer for my question in https://bugs.swift.org/browse/SR-1052 (support for @discardableResult attribute)?
Question: I'm starting to look at Part 5 (having the compiler use the new attr). What I have so far appears to be working with the exception of signatures like this: public mutating func withMutableCharacters<R>(_ body: (inout CharacterView) -> R) -> R where the return type is generic. For regular functions, I can skip the warning if the result type in the decl is Void. Any ideas on how to tell if a call to a generic function like withMutableCharacters has a return type of Void in context? My branch with the work for Part 5 so far is at https://github.com/tanadeau/swift/commits/sr-1052-use-attr. -- Trent Nadeau
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