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, 7 insertions, 2 deletions

diff --git a/include/clang/Lex/ModuleLoader.h b/include/clang/Lex/ModuleLoader.h
index 6a7fe0204f..0bd97b6bd4 100644
--- a/include/clang/Lex/ModuleLoader.h
+++ b/include/clang/Lex/ModuleLoader.h
@@ -14,13 +14,13 @@
 #ifndef LLVM_CLANG_LEX_MODULE_LOADER_H
 #define LLVM_CLANG_LEX_MODULE_LOADER_H
 
+#include "clang/Basic/Module.h"
 #include "clang/Basic/SourceLocation.h"
 #include "llvm/ADT/ArrayRef.h"
 
 namespace clang {
 
 class IdentifierInfo;
-class Module;
   
 /// \brief A sequence of identifier/location pairs used to describe a particular
 /// module or submodule, e.g., std.vector.
@@ -41,12 +41,17 @@ public:
   /// parameters.
   ///
   /// \param ImportLoc The location of the 'import' keyword.
+  ///
   /// \param Path The identifiers (and their locations) of the module
   /// "path", e.g., "std.vector" would be split into "std" and "vector".
+  /// 
+  /// \param Visibility The visibility provided for the names in the loaded
+  /// module.
   ///
   /// \returns If successful, returns the loaded module. Otherwise, returns 
   /// NULL to indicate that the module could not be loaded.
-  virtual Module *loadModule(SourceLocation ImportLoc, ModuleIdPath Path) = 0;
+  virtual Module *loadModule(SourceLocation ImportLoc, ModuleIdPath Path,
+                             Module::NameVisibilityKind Visibility) = 0;
 };
   
 }