Context.hpp

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#pragma once
 
#include "multiline_ostream.hpp"
#include "../Defs.hpp"
#include <sstream>
#include "StringIO.hpp"
 
namespace iv
{
 
class Context
{
public:
                            Context();
    virtual                 ~Context(){}
    
    class Endl{};
    
    class Begin{};
    class End{};
    
    template< class ... Items >
    void                    log( SrcInfo const & info, LogId id, Items const & ... items ) const;
    
    bool                    log_enabled( LogId id ) const;
    
    template< class ... Items >
    void                    warning( SrcInfo const & info, Items const & ... items ) const;
    
protected:
    virtual bool            log_process_enabled( LogId id ) const = 0;
    
    virtual void            log_process( SrcInfo const & info, LogId id, std::string const & message ) const = 0;
    
private:
    template< class T, class ... TT >
    void WriteItemsToStream( multiline_ostream & mss, T const & first, TT const & ... rest ) const;
    
    template< class ... TT >
    void WriteItemsToStream( multiline_ostream & mss, Endl, TT const & ... rest ) const;
    template< class ... TT >
    void WriteItemsToStream( multiline_ostream & mss, Begin, TT const & ... rest ) const;
    template< class ... TT >
    void WriteItemsToStream( multiline_ostream & mss, End, TT const & ... rest ) const;
    
    void WriteItemsToStream( multiline_ostream & mss ) const{}
    
private:
    mutable std::stringstream ss;
    mutable multiline_ostream mss;
};
 
}
 
#include "Context.inl"