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.

llvm-svn: 144424

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/lib/Lex/ModuleMap.cpp b/clang/lib/Lex/ModuleMap.cpp
index 7defe01..6695e42 100644
--- a/clang/lib/Lex/ModuleMap.cpp
+++ b/clang/lib/Lex/ModuleMap.cpp
@@ -84,6 +84,14 @@ ModuleMap::Module *ModuleMap::findModuleForHeader(const FileEntry *File) {
   return 0;
 }
 
+ModuleMap::Module *ModuleMap::findModule(StringRef Name) {
+  llvm::StringMap<Module *>::iterator Known = Modules.find(Name);
+  if (Known != Modules.end())
+    return Known->getValue();
+  
+  return 0;
+}
+
 static void indent(llvm::raw_ostream &OS, unsigned Spaces) {
   OS << std::string(' ', Spaces);
 }