From 1f1e7564834577ae031120d8988c26cb5fdd0ced Mon Sep 17 00:00:00 2001
From: Ted Kremenek <kremenek@apple.com>
Date: Thu, 25 Oct 2007 21:37:16 +0000
Subject: [PATCH] Added skeleton for Decl serialization.

llvm-svn: 43361
---
 clang/AST/DeclSerialization.cpp | 62 +++++++++++++++++++++++++++++++++
 clang/include/clang/AST/Decl.h  | 22 +++++++++++-
 2 files changed, 83 insertions(+), 1 deletion(-)
 create mode 100644 clang/AST/DeclSerialization.cpp

diff --git a/clang/AST/DeclSerialization.cpp b/clang/AST/DeclSerialization.cpp
new file mode 100644
index 000000000000..9b2278a4bebb
--- /dev/null
+++ b/clang/AST/DeclSerialization.cpp
@@ -0,0 +1,62 @@
+//===--- DeclSerialization.cpp - Serialization of Decls ---------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Ted Kremenek and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This files defines methods that implement bitcode serialization for Decls.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/Decl.h"
+#include "clang/AST/Expr.h"
+#include "llvm/Bitcode/Serialize.h"
+#include "llvm/Bitcode/Deserialize.h"
+
+using llvm::SerializeTrait;
+using llvm::Deserializer;
+using llvm::Serializer;
+using namespace clang;
+
+
+static void EmitEnumConstantDecl(Serializer& S, EnumConstantDecl& decl) {
+  S.Emit(decl.getLocation());
+  S.EmitPtr(decl.getIdentifier());
+//  S.Emit(decl.getType());  FIXME
+  S.EmitOwnedPtr<Stmt>(decl.getInitExpr());
+    // S.Emit(decl.getInitVal()); FIXME
+  S.EmitOwnedPtr<Decl>(decl.getNextDeclarator());
+}
+
+static void EmitFunctionDecl(Serializer& S, FunctionDecl& decl) {
+  S.Emit(decl.getLocation());
+  S.EmitPtr(decl.getIdentifier());
+//  S.Emit(decl.getType()); FIXME
+//  S.Emit(decl.getStorageClass()); FIXME
+  S.EmitBool(decl.isInline());
+  S.EmitOwnedPtr<Decl>(decl.getNextDeclarator());
+}
+
+
+void SerializeTrait<Decl>::Emit(Serializer& S, Decl& decl) {
+  assert (!decl.isInvalidDecl() && "Can only serialize valid decls.");
+
+  S.EmitInt((unsigned) decl.getKind());
+
+  switch (decl.getKind()) {
+    default:
+      assert (false && "Serialization not implemented for decl type.");
+      return;
+      
+    case Decl::EnumConstant:
+      EmitEnumConstantDecl(S,cast<EnumConstantDecl>(decl));
+      return;
+      
+    case Decl::Function:
+      EmitFunctionDecl(S,cast<FunctionDecl>(decl));
+      return;      
+  }  
+}
diff --git a/clang/include/clang/AST/Decl.h b/clang/include/clang/AST/Decl.h
index d06481fbdd39..5788dc40f55b 100644
--- a/clang/include/clang/AST/Decl.h
+++ b/clang/include/clang/AST/Decl.h
@@ -17,6 +17,18 @@
 #include "clang/Basic/SourceLocation.h"
 #include "clang/AST/Type.h"
 #include "llvm/ADT/APSInt.h"
+#include "llvm/Bitcode/Serialization.h"
+
+namespace clang {
+class Decl;
+}
+
+namespace llvm {
+template <> struct SerializeTrait<clang::Decl> {
+  static void Emit(Serializer& S, clang::Decl& D);
+  static clang::Decl* Materialize(Deserializer& D);
+};  
+} // end namespace llvm
 
 namespace clang {
 class Expr;
@@ -113,7 +125,7 @@ public:
   /// setInvalidDecl - Indicates the Decl had a semantic error. This
   /// allows for graceful error recovery.
   void setInvalidDecl() { InvalidDecl = 1; }
-  int isInvalidDecl() const { return InvalidDecl; }
+  bool isInvalidDecl() const { return (bool) InvalidDecl; }
   
   IdentifierNamespace getIdentifierNamespace() const {
     switch (DeclKind) {
@@ -138,6 +150,13 @@ public:
   static void addDeclKind(const Kind k);
   static bool CollectingStats(bool enable=false);
   static void PrintStats();
+  
+  // Deserialization of Decls.
+  template <typename DeclType>
+  static inline DeclType* DeserializeDecl(llvm::Deserializer& D) {
+    Decl* decl = llvm::SerializeTrait<Decl>::Materialize(D);
+    return cast<DeclType>(decl);
+  }  
     
   // Implement isa/cast/dyncast/etc.
   static bool classof(const Decl *) { return true; }
@@ -575,4 +594,5 @@ public:
 };
 
 }  // end namespace clang
+
 #endif