SE-0354 (Second Review): Regex Literals

[Ben_Cohen]

@Ben_Cohen

This means you can use the nightly toolchains from swift.org (either main or release/5.7 ) to try out the feature. But it looks like recent nightly toolchain builds haven't been posted yet – I'm checking on this and the latest 5.7 branch should be available shortly.

Update: the Swift 5.7 toolchain snapshot as of last night is now available on swift.org.