[lldb/Swift] Fix import attributes handing in expression evaluations #1982
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Previously, when importing a Swift module it the REPL or a Playground, LLDB would only cache the module name and reload the module at every expression evaluation. Doing so means that, when LLDB transfers imports information from the original source file to the new one, it is doing it with low fidelity, because LLDB would not keep track of the import attributes used in the previous expression evaluations. Thanks to swiftlang/swift#33935, we can now cache the whole `swift::AttributedImport<swift::ImportedModule>>` instead of only storing the module name. This struct contains both the `ImportedModule` with the `ModuleDecl` but also the `ImportOptions` set containing all the possible import attributes (Exported / Testable / PrivateImport ...) of that import statement. Now, before compiling and evaluating a Swift expression, LLDB fetches all the attributed imports cached previously and add them to the `ImplicitImportInfo` object that is used to create the `ModuleDecl` of the evaluated expression. It allows for the `ImportOptions` to be propagated in the compiled expression. This should fix some irregularities between the debugger and the compiler regarding import statements. rdar://65319954 Signed-off-by: Med Ismail Bennani <[email protected]>
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Cherry-pick #1937 & #1978 to
swift/next.