Introduce a module import declaration, so that we properly represent, e.g.,

  __import_module__ std.vector;

in the AST.

llvm-svn: 145725

1 files changed, 18 insertions, 3 deletions

diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 1e57a00f1f1..01c7906e800 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -9897,9 +9897,24 @@ DeclResult Sema::ActOnModuleImport(SourceLocation ImportLoc, ModuleIdPath Path)
   if (!Mod)
     return true;
   
-  // FIXME: Actually create a declaration to describe the module import.
-  (void)Mod;
-  return DeclResult((Decl *)0);
+  llvm::SmallVector<SourceLocation, 2> IdentifierLocs;
+  Module *ModCheck = Mod;
+  for (unsigned I = 0, N = Path.size(); I != N; ++I) {
+    // If we've run out of module parents, just drop the remaining identifiers.
+    // We need the length to be consistent.
+    if (!ModCheck)
+      break;
+    ModCheck = ModCheck->Parent;
+    
+    IdentifierLocs.push_back(Path[I].second);
+  }
+
+  ImportDecl *Import = ImportDecl::Create(Context, 
+                                          Context.getTranslationUnitDecl(),
+                                          ImportLoc, Mod,
+                                          IdentifierLocs);
+  Context.getTranslationUnitDecl()->addDecl(Import);
+  return Import;
 }
 
 void