parse.cpp

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#include "yaml-cpp-pm/yaml.h"
#include "yaml-cpp-pm/eventhandler.h"
#include <fstream>
#include <iostream>
#include <vector>

struct Params {
        bool hasFile;
        std::string fileName;
};

Params ParseArgs(int argc, char **argv) {
        Params p;

        std::vector<std::string> args(argv + 1, argv + argc);
        
        return p;
}

class NullEventHandler: public YAML_PM::EventHandler
{
public:
        virtual void OnDocumentStart(const YAML_PM::Mark&) {}
        virtual void OnDocumentEnd() {}
        
        virtual void OnNull(const YAML_PM::Mark&, YAML_PM::anchor_t) {}
        virtual void OnAlias(const YAML_PM::Mark&, YAML_PM::anchor_t) {}
        virtual void OnScalar(const YAML_PM::Mark&, const std::string&, YAML_PM::anchor_t, const std::string&) {}
        
        virtual void OnSequenceStart(const YAML_PM::Mark&, const std::string&, YAML_PM::anchor_t) {}
        virtual void OnSequenceEnd() {}
        
        virtual void OnMapStart(const YAML_PM::Mark&, const std::string&, YAML_PM::anchor_t) {}
        virtual void OnMapEnd() {}
};

void parse(std::istream& input)
{
        try {
                YAML_PM::Parser parser(input);
                YAML_PM::Node doc;
                while(parser.GetNextDocument(doc)) {
                        YAML_PM::Emitter emitter;
                        emitter << doc;
                        std::cout << emitter.c_str() << "\n";
                }
        } catch(const YAML_PM::Exception& e) {
                std::cerr << e.what() << "\n";
        }
}

int main(int argc, char **argv)
{
        Params p = ParseArgs(argc, argv);

        if(argc > 1) {
                std::ifstream fin;
                fin.open(argv[1]);
                parse(fin);
        } else {
                parse(std::cin);
        }

        return 0;
}