Implementing parsing and resolution of module export declarations

within module maps, which will (eventually) be used to re-export a
module from another module. There are still some pieces missing,
however.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145665 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 27 insertions, 1 deletions

diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index fe393dd2fe..2b7be7eaca 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -33,11 +33,11 @@
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprCXX.h"
 #include "clang/AST/StmtCXX.h"
+#include "clang/Lex/HeaderSearch.h"
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/PartialDiagnostic.h"
 #include "clang/Basic/TargetInfo.h"
-
 using namespace clang;
 using namespace sema;
 
@@ -484,6 +484,32 @@ void Sema::ActOnEndOfTranslationUnit() {
   }
 
   if (TUKind == TU_Module) {
+    // If we are building a module, resolve all of the exported declarations
+    // now.
+    if (Module *CurrentModule = PP.getCurrentModule()) {
+      ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap();
+      
+      llvm::SmallVector<Module *, 2> Stack;
+      Stack.push_back(CurrentModule);
+      while (!Stack.empty()) {
+        Module *Mod = Stack.back();
+        Stack.pop_back();
+        
+        // Resolve the exported declarations.
+        // FIXME: Actually complain, once we figure out how to teach the
+        // diagnostic client to deal with complains in the module map at this
+        // point.
+        ModMap.resolveExports(Mod, /*Complain=*/false);
+        
+        // Queue the submodules, so their exports will also be resolved.
+        for (llvm::StringMap<Module *>::iterator Sub = Mod->SubModules.begin(),
+             SubEnd = Mod->SubModules.end();
+             Sub != SubEnd; ++Sub) {
+          Stack.push_back(Sub->getValue());
+        }
+      }
+    }
+    
     // Modules don't need any of the checking below.
     TUScope = 0;
     return;