Brent Royal-Gordon 9a838bb654 Differentiate between Swift 5 and “Swift 6” #file ...

In -swift-version 5 and earlier, #file will continue to be a synonym for #filePath; in a future -swift-version (“Swift 6 mode”), it will become a synonym for #fileID. #file in libraries will be interpreted according to the language mode the library was compiled in, not the language mode its client uses.

Implement this behavior, tied to a frontend flag instead of a language version. We do so by splitting the old `MagicIdentifierLiteralExprKind::File` into two separate cases, `FileIDSpelledAsFile` and `FilePathSpelledAsFile`, and propagating this distinction throughout the AST. This seems cleaner than looking up the setting for the module the declaration belongs to every time we see `File`.

This doesn’t handle module interfaces yet; we’ll take care of those in a separate commit.

2020-07-13 14:06:55 -07:00

62 KiB

Raw Blame History

View Raw