[5.9][Macros] Attached macro expansions return single string #66935
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* Move collapse(expansions:for:attachedTo:) to SwiftSyntaxMacroExpansion * SwiftSyntaxMacroExpansion.expandAttachedMacro() now perform collapsing * SwiftSyntaxMacroExpansion.expandAttachedMacroWithoutCollapsing() to keep old behavior * IPC request 'getCapability' now sends the host protocol version * Unified IPC response 'macroExpansionResult' that returns single string for both 'expandFreestandingMacro' and 'expandAttachedMacro' * Compiler accepts old 'expandFreestandingMacroResult' and 'expandAttachedMacroResult' to keep compatibility * Plugins check the compiler's protcol version to see if it suppports 'macroExpansionResult', and fall back to old behavior if necessary (cherry picked from commit eefe9dc)
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swiftlang/swift-syntax#1848 |
DougGregor
approved these changes
Jun 26, 2023
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Cherry-pick #66918 into release/5.9
(swift-syntax change: swiftlang/swift-syntax#1848)
expandAttachedMacrois[String]?. After the plugin returns it, the compiler joined them to make a "expanded source code". This is not good because the joining logic is in the compiler, but not inswift-syntax, which means some syntactic macro expansion logic can't use the same joining logic as the compiler. This change moves the logic toswift-syntax, and changes the IPC return value toString?.