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2 Commits

Author SHA1 Message Date
Doug Gregor
569859ab60 Add hasFeature(X) to check for future features 2022-07-19 21:27:39 -07:00
Doug Gregor
a317fad88d Add -enable-upcoming-feature X command-line argument. 
Introduce the `-enable-upcoming-feature X` command-line argument to
allow one to opt into features that will be enabled in an upcoming language
mode. Stage in several features this way (`ConciseMagicFile`,
`ForwardTrailingClosures`, `BareSlashRegexLiterals`).
 2022-07-19 21:20:12 -07:00