Implementing parsing and resolution of module export declarations

within module maps, which will (eventually) be used to re-export a
module from another module. There are still some pieces missing,
however.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145665 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 33 insertions, 0 deletions

diff --git a/include/clang/Basic/Module.h b/include/clang/Basic/Module.h
index 4eaa1be291..43edcfacec 100644
--- a/include/clang/Basic/Module.h
+++ b/include/clang/Basic/Module.h
@@ -15,10 +15,12 @@
 #define LLVM_CLANG_BASIC_MODULE_H
 
 #include "clang/Basic/SourceLocation.h"
+#include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include <string>
+#include <utility>
 
 namespace llvm {
   class raw_ostream;
@@ -28,6 +30,10 @@ namespace clang {
   
 class FileEntry;
 
+/// \brief Describes the name of a module.
+typedef llvm::SmallVector<std::pair<std::string, SourceLocation>, 2>
+  ModuleId;
+  
 /// \brief Describes a module or submodule.
 class Module {
 public:
@@ -73,6 +79,33 @@ public:
   ///\ brief The visibility of names within this particular module.
   NameVisibilityKind NameVisibility;
   
+  /// \brief Describes an exported module.
+  ///
+  /// The pointer is the module being re-exported, while the bit will be true
+  /// to indicate that this is a wildcard export.
+  typedef llvm::PointerIntPair<Module *, 1, bool> ExportDecl;
+  
+  /// \brief The set of export declarations.
+  llvm::SmallVector<ExportDecl, 2> Exports;
+  
+  /// \brief Describes an exported module that has not yet been resolved
+  /// (perhaps because the module it refers to has not yet been loaded).
+  struct UnresolvedExportDecl {
+    /// \brief The location of the 'export' keyword in the module map file.
+    SourceLocation ExportLoc;
+    
+    /// \brief The name of the module.
+    ModuleId Id;
+    
+    /// \brief Whether this export declaration ends in a wildcard, indicating
+    /// that all of its submodules should be exported (rather than the named
+    /// module itself).
+    bool Wildcard;
+  };
+  
+  /// \brief The set of export declarations that have yet to be resolved.
+  llvm::SmallVector<UnresolvedExportDecl, 2> UnresolvedExports;
+  
   /// \brief Construct a top-level module.
   explicit Module(StringRef Name, SourceLocation DefinitionLoc,
                   bool IsFramework)