lexer.hpp

#include <boost/spirit/include/lex_lexertl.hpp>
#include <vector>
class Lex {
    std::string              filename_;
    std::vector<std::string> tokens_;
    unsigned                 current_;
 
  public:
    template <typename Lexer>
    struct ParseInput : boost::spirit::lex::lexer<Lexer> {
        ParseInput();
    };

    struct Add {
        typedef bool result_type;
        template <typename Token>
        bool operator()(Token const& t, std::vector<std::string>& tks) const;
    };

    explicit Lex(std::string filename);

    std::string Next();
 
  private:
    void Tokenize();
};