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Keep track of source files created for macro expansions and such.

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Introduce a new source file kind to describe source files for macro
expansions, and include the macro expression that they expand. This
establishes a "parent" relationship

Also track every kind of auxiliary source file---whether for macro
expansions or other reasons---that is introduced into a module, adding
an operation that allows us to find the source file that contains a
given source location.
This commit is contained in:
Doug Gregor
2022-10-29 22:11:56 -07:00
parent 60c8b4b178
commit 0cb2746c49
14 changed files with 198 additions and 7 deletions
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24
include/swift/AST/Module.h
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@@ -106,7 +106,8 @@ enum class SourceFileKind {
Library, ///< A normal .swift file.
Main, ///< A .swift file that can have top-level code.
SIL, ///< Came from a .sil file.
Interface ///< Came from a .swiftinterface file, representing another module.
Interface, ///< Came from a .swiftinterface file, representing another module.
MacroExpansion, ///< Came from a macro expansion.
};
/// Contains information about where a particular path is used in
@@ -158,6 +159,10 @@ enum class ResilienceStrategy : unsigned {
class OverlayFile;
/// A mapping used to find the source file that contains a particular source
/// location.
class ModuleSourceFileLocationMap;
/// The minimum unit of compilation.
///
/// A module is made up of several file-units, which are all part of the same
@@ -229,6 +234,13 @@ private:
SmallVector<FileUnit *, 2> Files;
/// Mapping used to find the source file associated with a given source
/// location.
ModuleSourceFileLocationMap *sourceFileLocationMap = nullptr;
/// The set of auxiliary source files build as part of this module.
SmallVector<SourceFile *, 2> AuxiliaryFiles;
llvm::SmallDenseMap<Identifier, SmallVector<OverlayFile *, 1>>
declaredCrossImports;
@@ -328,6 +340,13 @@ public:
/// SynthesizedFileUnit instead.
void addFile(FileUnit &newFile);
/// Add an auxiliary source file, introduced as part of the translation.
void addAuxiliaryFile(SourceFile &sourceFile);
/// Produces the source file that contains the given source location, or
/// \c nullptr if the source location isn't in this module.
SourceFile *getSourceFileContainingLocation(SourceLoc loc);
/// Creates a map from \c #filePath strings to corresponding \c #fileID
/// strings, diagnosing any conflicts.
///
@@ -414,6 +433,9 @@ private:
/// present overlays as if they were part of their underlying module.
std::pair<ModuleDecl *, Identifier> getDeclaringModuleAndBystander();
/// Update the source-file location map to make it current.
void updateSourceFileLocationMap();
public:
/// If this is a traditional (non-cross-import) overlay, get its underlying
/// module if one exists.