Add @retroactive to conformances that need it #712
Merged
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SE-0364 requires that retroactive conformance be marked with
@retroactive
to suppress warnings about the dangers of conforming types you don't own to protocols you don't own. TheRegexBuilder
module declares conformances toRegexComponent
(from theRegex
module) on several types from the standard library, likeString
. SinceRegexBuilder
declares neither the protocol nor the conforming type, these conformances are technically retroactive even though the modules involved are all developed and distributed together and can be trusted to organize the conformances this way safely.The compiler warnings about these conformances are quite spammy; they get emitted every time someone builds the Swift compiler, so I'd like to suppress them.