David Farler c32fb8e7b9 SE-0020: Swift Language Version Build Configuration ...

Introduce a new "swift" build configuration that guards declarations
and statements with a language version - if the current language version
of the compiler is at least that version, the block will parse as normal.
For inactive blocks, the code will not be parsed an no diagnostics will
be emitted there.

Example:

    #if swift(>=2.2)
      print("Active")
    #else
      this code will not parse or emit diagnostics
    #endif

https://github.com/apple/swift-evolution/blob/master/proposals/0020-if-swift-version.md
rdar://problem/19823607

2016-01-21 16:31:19 -08:00

2.0 KiB

Raw Permalink Blame History

View Raw