#include <fmt/core.h>
#include <iostream>

%%{
  machine Parser;
  alphtype char;

  action token {
    tk = input.substr(start - begin, fpc - start);
    std::cout << "TOKEN: " << std::quoted(tk) << '\n';
  }
  action mark { start = fpc; }
  action title { fmt::println("TITLE"); }
  action enum { fmt::println("ENUM"); }
  action content {
    tk = input.substr(start - begin, fpc - start);
    std::cout << "CONTENT:" << std::quoted(tk) << '\n';
  }
  action start { fmt::println("----- START"); }
  action end { fmt::println("END"); }
  action plain { fmt::println("PLAIN"); }

  eol = "\n";
  start = "===" eol $start;
  end = "---" eol $end;
  pound = "#" $title;
  asterisk = "*" $enum;
  content = (any+ -- (eol|end)) >mark %content;

  title = pound space* content  eol;
  enum = asterisk space* content eol;
  line = space* content eol;
  blank = space* eol;

  slide = (title | enum | line | blank)+ end;

  main := start (slide)+;
}%%

%% write data;


bool Parser::parse(const std::string& input) {
  int cs = 0;
  const char *start = nullptr;
  const char *begin = input.data();
  const char *p = input.data();
  const char *pe = p + input.size();
  const char *eof = p + input.size(); (void)eof;
  std::string tk;

  %% write init;
  %% write exec;

  bool good = pe - p == 0;

  if(good) {
    finalize();
  } else {
    error = true;
    std::cout << "!!!!!!!!!!!!!!!!!!!!!! error at:";
    std::cout << p;
  }
  return good;
}