parse_rmd.h

#ifndef PARSE_RMD_HPP
#define PARSE_RMD_HPP

//#define BOOST_SPIRIT_X3_DEBUG
#include <boost/spirit/home/x3.hpp>

#include "parse_yaml.h"
#include "parse_indent.h"
#include "parse_chunk.h"
#include "parse_rmd_ast.h"

namespace client { namespace parser {
  namespace x3 = boost::spirit::x3;

  // Markdown text stuff
  auto const chunk_start_sig = (*indent_pat >> x3::lit("```{"));
  auto const heading_start_sig = x3::lit("#");

  auto const text_line = x3::rule<struct _, std::string>{"markdown text line"}
  = !(chunk_start_sig | heading_start_sig) >> x3::lexeme[ *(x3::char_ - x3::eol) ];

  auto const text = x3::rule<struct _, std::vector<std::string>>{"markdown text"}
  = +(text_line >> x3::eol);

  auto heading_level = ([](auto& ctx) { x3::_val(ctx).level =  x3::_attr(ctx).size(); });
  auto heading_name = ([](auto& ctx) { x3::_val(ctx).name = x3::_attr(ctx); });


  // Heading stuff
  auto const heading = x3::rule<struct _, client::ast::heading> {"markdown heading"}
  = (x3::repeat(1,6)[x3::char_("#")])[ heading_level ] >>
    -x3::lit(" ") >>
    ( *(x3::char_ - x3::eol) )[ heading_name ] >>
    x3::eol;

  // Rmd stuff
  auto const element = x3::rule<struct _, client::ast::element> {"rmd element"}
  = (chunk | heading | text) >> *x3::eol;

  auto const rmd = x3::rule<struct _, client::ast::rmd> {"rmd"}
  = -(yaml >> *x3::eol) >> *element;
} }

#endif