> On May 12, 2016, at 11:05 PM, Marco S Hyman <m...@snafu.org> wrote:
>
> On May 12, 2016, at 10:38 PM, Tyler Fleming Cloutier via swift-users
> <swift-users@swift.org> wrote:
>>
>> Hello everyone,
>>
>> It does seem like it is currently possible to wrap just the function
>> declaration in an #if swift() directive like so:
>>
>> #if swift(>=3.0)
>> public func add(filter filterName: String, path: String) {
>> #else // ERROR Expected ‘}’ at end of brace statement
>> public func addFilter(filterName: String, path: String) {
>> #endif
>
> Swift conditional compilation is not line based. SE-0020 said:
>
> "Like other build configurations, #if swift isn't line-based - it encloses
> whole statements or declarations. However, unlike the others, the compiler
> won't parse inactive branches guarded by #if swift or emit lex diagnostics,
> so syntactic differences for other Swift versions can be in the same file.”
>
> https://github.com/apple/swift-evolution/blob/master/proposals/0020-if-swift-version.md
>
>> Is it possible I’m missing how to do this? This is particularly painful in
>> Swift 3 given the change to move have labels on the first function parameter
>> by default. As far as I can see it means that I am required to wrap the
>> entire function body even if nothing else is incompatible with Swift 3.
>
> My solution: a git branch for 2.x and a git branch for 3.x. Eventually the
> 2.x branch will wither away.
>
> Marc
I see. Thanks for the quick reply Marc!
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