Serialization for captured statements

Add serialization for captured statements and captured decls.  Also add
a const_capture_iterator to CapturedStmt.

Test contributed by Wei Pan

Differential Revision: http://llvm-reviews.chandlerc.com/D727


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181048 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTWriterDecl.cpp b/lib/Serialization/ASTWriterDecl.cpp
index ef50cdb..105042f 100644
--- a/lib/Serialization/ASTWriterDecl.cpp
+++ b/lib/Serialization/ASTWriterDecl.cpp
@@ -826,8 +826,13 @@
   Code = serialization::DECL_BLOCK;
 }
 
-void ASTDeclWriter::VisitCapturedDecl(CapturedDecl *) {
-  llvm_unreachable("not implemented yet");
+void ASTDeclWriter::VisitCapturedDecl(CapturedDecl *CD) {
+  Record.push_back(CD->getNumParams());
+  VisitDecl(CD);
+  // Body is stored by VisitCapturedStmt.
+  for (unsigned i = 0; i < CD->getNumParams(); ++i)
+    Writer.AddDeclRef(CD->getParam(i), Record);
+  Code = serialization::DECL_CAPTURED;
 }
 
 void ASTDeclWriter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {