X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FSupport%2FYAMLParser.h;h=e3f4f003884a2a4c3a8717aaa1d52bd0d24aa04b;hb=a5bf44b0b396e8b9ae0db5c62c05ac6618aab5d3;hp=27d039164c16e880fbb23dbe5f04780cb9b5da4d;hpb=93210e847a1496b24cef881723e57c489082dcfe;p=oota-llvm.git

diff --git a/include/llvm/Support/YAMLParser.h b/include/llvm/Support/YAMLParser.h
index 27d039164c1..e3f4f003884 100644
--- a/include/llvm/Support/YAMLParser.h
+++ b/include/llvm/Support/YAMLParser.h
@@ -77,8 +77,13 @@ std::string escape(StringRef Input);
 ///        documents.
 class Stream {
 public:
+  /// @brief This keeps a reference to the string referenced by \p Input.
   Stream(StringRef Input, SourceMgr &);
 
+  /// @brief This takes ownership of \p InputBuffer.
+  Stream(MemoryBuffer *InputBuffer, SourceMgr &);
+  ~Stream();
+
   document_iterator begin();
   document_iterator end();
   void skip();
@@ -113,7 +118,6 @@ public:
   };
 
   Node(unsigned int Type, OwningPtr<Document>&, StringRef Anchor);
-  virtual ~Node();
 
   /// @brief Get the value of the anchor attached to this node. If it does not
   ///        have one, getAnchor().size() will be 0.
@@ -130,10 +134,9 @@ public:
   void setError(const Twine &Message, Token &Location) const;
   bool failed() const;
 
-  virtual void skip() {};
+  virtual void skip() {}
 
   unsigned int getType() const { return TypeID; }
-  static inline bool classof(const Node *) { return true; }
 
   void *operator new ( size_t Size
                      , BumpPtrAllocator &Alloc
@@ -149,6 +152,10 @@ protected:
   OwningPtr<Document> &Doc;
   SMRange SourceRange;
 
+  void operator delete(void *) throw() {}
+
+  virtual ~Node() {}
+
 private:
   unsigned int TypeID;
   StringRef Anchor;
@@ -162,7 +169,6 @@ class NullNode : public Node {
 public:
   NullNode(OwningPtr<Document> &D) : Node(NK_Null, D, StringRef()) {}
 
-  static inline bool classof(const NullNode *) { return true; }
   static inline bool classof(const Node *N) {
     return N->getType() == NK_Null;
   }
@@ -195,7 +201,6 @@ public:
   ///        This happens with escaped characters and multi-line literals.
   StringRef getValue(SmallVectorImpl<char> &Storage) const;
 
-  static inline bool classof(const ScalarNode *) { return true; }
   static inline bool classof(const Node *N) {
     return N->getType() == NK_Scalar;
   }
@@ -208,25 +213,6 @@ private:
                                 , SmallVectorImpl<char> &Storage) const;
 };
 
-static bool getAs(const ScalarNode *SN, bool &Result) {
-  SmallString<4> Storage;
-  StringRef Value = SN->getValue(Storage);
-  if (Value == "true")
-    Result = true;
-  else if (Value == "false")
-    Result = false;
-  else
-    return false;
-  return true;
-}
-
-template<class T>
-typename enable_if_c<std::numeric_limits<T>::is_integer, bool>::type
-getAs(const ScalarNode *SN, T &Result) {
-  SmallString<4> Storage;
-  return !SN->getValue(Storage).getAsInteger(0, Result);
-}
-
 /// @brief A key and value pair. While not technically a Node under the YAML
 ///        representation graph, it is easier to treat them this way.
 ///
@@ -256,12 +242,11 @@ public:
   /// @returns The value, or nullptr if failed() == true.
   Node *getValue();
 
-  virtual void skip() {
+  virtual void skip() LLVM_OVERRIDE {
     getKey()->skip();
     getValue()->skip();
   }
 
-  static inline bool classof(const KeyValueNode *) { return true; }
   static inline bool classof(const Node *N) {
     return N->getType() == NK_KeyValue;
   }
@@ -351,7 +336,7 @@ public:
   enum MappingType {
     MT_Block,
     MT_Flow,
-    MT_Inline //< An inline mapping node is used for "[key: value]".
+    MT_Inline ///< An inline mapping node is used for "[key: value]".
   };
 
   MappingNode(OwningPtr<Document> &D, StringRef Anchor, MappingType MT)
@@ -373,11 +358,10 @@ public:
 
   iterator end() { return iterator(); }
 
-  virtual void skip() {
+  virtual void skip() LLVM_OVERRIDE {
     yaml::skip(*this);
   }
 
-  static inline bool classof(const MappingNode *) { return true; }
   static inline bool classof(const Node *N) {
     return N->getType() == NK_Mapping;
   }
@@ -436,11 +420,10 @@ public:
 
   iterator end() { return iterator(); }
 
-  virtual void skip() {
+  virtual void skip() LLVM_OVERRIDE {
     yaml::skip(*this);
   }
 
-  static inline bool classof(const SequenceNode *) { return true; }
   static inline bool classof(const Node *N) {
     return N->getType() == NK_Sequence;
   }
@@ -465,7 +448,6 @@ public:
   StringRef getName() const { return Name; }
   Node *getTarget();
 
-  static inline bool classof(const ScalarNode *) { return true; }
   static inline bool classof(const Node *N) {
     return N->getType() == NK_Alias;
   }
@@ -528,34 +510,44 @@ private:
 /// @brief Iterator abstraction for Documents over a Stream.
 class document_iterator {
 public:
-  document_iterator() : Doc(NullDoc) {}
-  document_iterator(OwningPtr<Document> &D) : Doc(D) {}
+  document_iterator() : Doc(0) {}
+  document_iterator(OwningPtr<Document> &D) : Doc(&D) {}
 
+  bool operator ==(const document_iterator &Other) {
+    if (isAtEnd() || Other.isAtEnd())
+      return isAtEnd() && Other.isAtEnd();
+
+    return *Doc == *Other.Doc;
+  }
   bool operator !=(const document_iterator &Other) {
-    return Doc != Other.Doc;
+    return !(*this == Other);
   }
 
   document_iterator operator ++() {
-    if (!Doc->skip()) {
-      Doc.reset(0);
+    assert(Doc != 0 && "incrementing iterator past the end.");
+    if (!(*Doc)->skip()) {
+      Doc->reset(0);
     } else {
-      Stream &S = Doc->stream;
-      Doc.reset(new Document(S));
+      Stream &S = (*Doc)->stream;
+      Doc->reset(new Document(S));
     }
     return *this;
   }
 
   Document &operator *() {
-    return *Doc;
+    return *Doc->get();
   }
 
   OwningPtr<Document> &operator ->() {
-    return Doc;
+    return *Doc;
   }
 
 private:
-  static OwningPtr<Document> NullDoc;
-  OwningPtr<Document> &Doc;
+  bool isAtEnd() const {
+    return Doc == 0 || *Doc == 0;
+  }
+
+  OwningPtr<Document> *Doc;
 };
 
 }