Introduce the notion of name visibility into modules. For a given

(sub)module, all of the names may be hidden, just the macro names may
be exposed (for example, after the preprocessor has seen the import of
the module but the parser has not), or all of the names may be
exposed. Importing a module makes its names, and the names in any of
its non-explicit submodules, visible to name lookup (transitively).

This commit only introduces the notion of name visible and marks
modules and submodules as visible when they are imported. The actual
name-hiding logic in the AST reader will follow (along with test cases).



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145586 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/include/clang/Serialization/ASTReader.h b/include/clang/Serialization/ASTReader.h
index 0e659acfa0..3f66eb5118 100644
--- a/include/clang/Serialization/ASTReader.h
+++ b/include/clang/Serialization/ASTReader.h
@@ -803,6 +803,16 @@ public:
   /// the actual file in the file system.
   ASTReadResult validateFileEntries(ModuleFile &M);
 
+  /// \brief Make the entities in the given module and any of its (non-explicit)
+  /// submodules visible to name lookup.
+  ///
+  /// \param Mod The module whose names should be made visible.
+  ///
+  /// \param Visibility The level of visibility to give the names in the module.
+  /// Visibility can only be increased over time.
+  void makeModuleVisible(Module *Mod, 
+                         Module::NameVisibilityKind NameVisibility);
+  
   /// \brief Set the AST callbacks listener.
   void setListener(ASTReaderListener *listener) {
     Listener.reset(listener);