Implement support for module requirements, which indicate the language

features needed for a particular module to be available. This allows
mixed-language modules, where certain headers only work under some
language variants (e.g., in C++, std.tuple might only be available in
C++11 mode).

llvm-svn: 147387

1 files changed, 4 insertions, 1 deletions

diff --git a/clang/include/clang/Lex/HeaderSearch.h b/clang/include/clang/Lex/HeaderSearch.h
index ade5d2a6f12..10242fa2644 100644
--- a/clang/include/clang/Lex/HeaderSearch.h
+++ b/clang/include/clang/Lex/HeaderSearch.h
@@ -185,7 +185,8 @@ class HeaderSearch {
   explicit HeaderSearch(const HeaderSearch&);
   void operator=(const HeaderSearch&);
 public:
-  HeaderSearch(FileManager &FM, DiagnosticsEngine &Diags);
+  HeaderSearch(FileManager &FM, DiagnosticsEngine &Diags,
+               const LangOptions &LangOpts);
   ~HeaderSearch();
 
   FileManager &getFileMgr() const { return FileMgr; }
@@ -369,6 +370,8 @@ public:
   bool hasModuleMap(StringRef Filename, const DirectoryEntry *Root);
   
   /// \brief Retrieve the module that corresponds to the given file, if any.
+  ///
+  /// \param File The header that we wish to map to a module.
   Module *findModuleForHeader(const FileEntry *File);