token_stream.h

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#ifndef META_TOKEN_STREAM_H_
#define META_TOKEN_STREAM_H_

#include <memory>
#include <string>
#include <stdexcept>

namespace meta
{
namespace analyzers
{

class token_stream
{
  public:
    virtual std::string next() = 0;

    virtual operator bool() const = 0;

    virtual void set_content(const std::string& content) = 0;

    virtual ~token_stream() = default;

    virtual std::unique_ptr<token_stream> clone() const = 0;

    class token_stream_exception : public std::runtime_error
    {
        using std::runtime_error::runtime_error;
    };
};

}
}
#endif