Teach the search for modules to consider modules described by a module

map, so long as they have an umbrella header. This makes it possible
to introduce a module map + umbrella header for a given set of
headers, to turn it into a module.

There are two major deficiencies here: first, we don't go hunting for
module map files when we just see a module import (so we won't know
about the modules described therein). Second, we don't yet have a way
to build modules that don't have umbrella headers, or have incomplete
umbrella headers.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144424 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 1 deletions

diff --git a/include/clang/Lex/ModuleMap.h b/include/clang/Lex/ModuleMap.h
index 291f2bbdec..6ca37f1005 100644
--- a/include/clang/Lex/ModuleMap.h
+++ b/include/clang/Lex/ModuleMap.h
@@ -89,7 +89,7 @@ private:
   llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags;
   LangOptions LangOpts;
   
-  /// \brief The top-level modules that are known
+  /// \brief The top-level modules that are known.
   llvm::StringMap<Module *> Modules;
   
   /// \brief Mapping from each header to the module that owns the contents of the
@@ -121,6 +121,13 @@ public:
   /// that no module owns this header file.
   Module *findModuleForHeader(const FileEntry *File);
 
+  /// \brief Retrieve a module with the given name.
+  ///
+  /// \param The name of the module to look up.
+  ///
+  /// \returns The named module, if known; otherwise, returns null.
+  Module *findModule(StringRef Name);
+  
   /// \brief Parse the given module map file, and record any modules we 
   /// encounter.
   ///