siena::Tag Class Reference

interface of a generic tag in the Siena data model. More...

#include <tags.h>

Inheritance diagram for siena::Tag:

Public Member Functions
virtual	~Tag ()
	virtual destructor.
virtual std::string	to_string () const =0
	string value of this tag. More...
virtual std::string &	to_string (std::string &) const =0
	string value of this tag. More...

Detailed Description

interface of a generic tag in the Siena data model.

A tag is essentially a reference to the value of the tag, which is simply a string. This very basic interface defines what amounts to an immutable tag.

Member Function Documentation

virtual std::string siena::Tag::to_string ( ) const

pure virtual

string value of this tag.

Returns

this tag expressed as a standard string object.

virtual std::string& siena::Tag::to_string ( std::string &  ) const

pure virtual

string value of this tag.

Assigns to the string value of this tag to the given standard string object.