virtual bool preflightElement(unsigned, void *&) = 0;
virtual void postflightElement(void*) = 0;
virtual void endSequence() = 0;
+ virtual bool canElideEmptySequence() = 0;
virtual unsigned beginFlowSequence() = 0;
virtual bool preflightFlowElement(unsigned, void *&) = 0;
virtual void postflightFlowElement(void*) = 0;
virtual void endFlowSequence() = 0;
+ virtual bool mapTag(StringRef Tag, bool Default=false) = 0;
virtual void beginMapping() = 0;
virtual void endMapping() = 0;
virtual bool preflightKey(const char*, bool, bool, bool &, void *&) = 0;
typename llvm::enable_if_c<has_SequenceTraits<T>::value,void>::type
mapOptional(const char* Key, T& Val) {
// omit key/value instead of outputting empty sequence
- if ( this->outputting() && !(Val.begin() != Val.end()) )
+ if ( this->canElideEmptySequence() && !(Val.begin() != Val.end()) )
return;
this->processKey(Key, Val, false);
}
void mapOptional(const char* Key, T& Val, const T& Default) {
this->processKeyWithDefault(Key, Val, Default, false);
}
-
-
+
private:
template <typename T>
void processKeyWithDefault(const char *Key, T &Val, const T& DefaultValue,
static void output(const StringRef &, void*, llvm::raw_ostream &);
static StringRef input(StringRef, void*, StringRef &);
};
+
+template<>
+struct ScalarTraits<std::string> {
+ static void output(const std::string &, void*, llvm::raw_ostream &);
+ static StringRef input(StringRef, void*, std::string &);
+};
template<>
struct ScalarTraits<uint8_t> {
///
class Input : public IO {
public:
- // Construct a yaml Input object from a StringRef and optional user-data.
- Input(StringRef InputContent, void *Ctxt=NULL);
+ // Construct a yaml Input object from a StringRef and optional
+ // user-data. The DiagHandler can be specified to provide
+ // alternative error reporting.
+ Input(StringRef InputContent,
+ void *Ctxt = NULL,
+ SourceMgr::DiagHandlerTy DiagHandler = NULL,
+ void *DiagHandlerCtxt = NULL);
~Input();
-
+
// Check if there was an syntax or semantic error during parsing.
llvm::error_code error();
- // To set alternate error reporting.
- void setDiagHandler(llvm::SourceMgr::DiagHandlerTy Handler, void *Ctxt = 0);
-
private:
virtual bool outputting();
+ virtual bool mapTag(StringRef, bool);
virtual void beginMapping();
virtual void endMapping();
virtual bool preflightKey(const char *, bool, bool, bool &, void *&);
virtual void endBitSetScalar();
virtual void scalarString(StringRef &);
virtual void setError(const Twine &message);
+ virtual bool canElideEmptySequence();
class HNode {
+ virtual void anchor();
public:
HNode(Node *n) : _node(n) { }
virtual ~HNode() { }
};
class EmptyHNode : public HNode {
+ virtual void anchor();
public:
EmptyHNode(Node *n) : HNode(n) { }
- virtual ~EmptyHNode() {}
static inline bool classof(const HNode *n) {
return NullNode::classof(n->_node);
}
};
class ScalarHNode : public HNode {
+ virtual void anchor();
public:
ScalarHNode(Node *n, StringRef s) : HNode(n), _value(s) { }
- virtual ~ScalarHNode() { }
StringRef value() const { return _value; }
virtual ~Output();
virtual bool outputting();
+ virtual bool mapTag(StringRef, bool);
virtual void beginMapping();
virtual void endMapping();
virtual bool preflightKey(const char *key, bool, bool, bool &, void *&);
virtual void endBitSetScalar();
virtual void scalarString(StringRef &);
virtual void setError(const Twine &message);
-
+ virtual bool canElideEmptySequence();
public:
// These are only used by operator<<. They could be private
// if that templated operator could be made a friend.
inline
typename llvm::enable_if_c<has_SequenceTraits<T>::value,Input &>::type
operator>>(Input &yin, T &docSeq) {
- yin.setCurrentDocument();
- yamlize(yin, docSeq, true);
+ if (yin.setCurrentDocument())
+ yamlize(yin, docSeq, true);
return yin;
}