[5.3][ASTPrinter] Don't print inferred opaque result type witness #31834
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Opaque result type syntax is not usable except the declaration of itself. In other places, users need to let them inferred. If they are inferred associated type, they need to reffered by the name of the associated type. rdar://problem/59817674 (cherry picked from commit 29398b1)
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akyrtzi
approved these changes
May 15, 2020
rintaro
changed the title
AnthonyLatsis
added
swift 5.3
🍒 release cherry pick
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Cherry-pick of #31821 into.
release/5.3substType(), if a type witness is found to be a opaque result type, use the interface type of the witness decl which is a implicit typealias decl/type so that opaque result types don't appear in function parameter position etc.