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Added an iterator class that can iterate through both sequence and map nodes.

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This commit is contained in:
Jesse Beder 2008-07-02 01:22:39 +00:00
parent f7358701f2
commit d56b54b34f
16 changed files with 393 additions and 105 deletions
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65
node.h
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@ -2,19 +2,42 @@
#include <string>
#include <ios>
#include <vector>
#include <map>
#include "parserstate.h"
#include "exceptions.h"
namespace YAML
{
const std::string StrTag = "!!str";
const std::string SeqTag = "!!seq";
const std::string MapTag = "!!map";
class Content;
class Scanner;
class Node
{
public:
class Iterator
{
public:
Iterator();
Iterator(std::vector <Node *>::const_iterator it);
Iterator(std::map <Node *, Node *>::const_iterator it);
~Iterator();
friend bool operator == (const Iterator& it, const Iterator& jt);
friend bool operator != (const Iterator& it, const Iterator& jt);
Iterator& operator ++ ();
const Node& operator * ();
const Node& first();
const Node& second();
private:
enum ITER_TYPE { IT_NONE, IT_SEQ, IT_MAP };
ITER_TYPE type;
std::vector <Node *>::const_iterator seqIter;
std::map <Node *, Node *>::const_iterator mapIter;
};
public:
Node();
~Node();
@ -23,6 +46,40 @@ namespace YAML
void Parse(Scanner *pScanner, const ParserState& state);
void Write(std::ostream& out, int indent);
Iterator begin() const;
Iterator end() const;
template <typename T>
const Node& operator [] (const T& key) const {
if(!m_pContent)
throw BadDereference();
for(Iterator it=begin();it!=end();++it) {
T t;
try {
it.first() >> t;
if(key == t)
return it.second();
} catch(InvalidScalar&) {
}
}
throw BadDereference();
}
const Node& operator [] (const char *key) const {
return operator [] (std::string(key));
}
// extraction
friend void operator >> (const Node& node, std::string& s);
friend void operator >> (const Node& node, int& i);
friend void operator >> (const Node& node, unsigned& u);
friend void operator >> (const Node& node, long& l);
friend void operator >> (const Node& node, float& f);
friend void operator >> (const Node& node, double& d);
friend void operator >> (const Node& node, char& c);
private:
void ParseHeader(Scanner *pScanner, const ParserState& state);
void ParseTag(Scanner *pScanner, const ParserState& state);