separate_keyword_section.h

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// Author(s): Wieger Wesselink
// Copyright: see the accompanying file COPYING or copy at
// https://github.com/mCRL2org/mCRL2/blob/master/COPYING
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
 
#ifndef MCRL2_UTILITIES_DETAIL_SEPARATE_KEYWORD_SECTION_H
#define MCRL2_UTILITIES_DETAIL_SEPARATE_KEYWORD_SECTION_H
 
#include <utility>
#include <boost/algorithm/string/join.hpp>
#include <boost/algorithm/string/trim.hpp>
#include "mcrl2/utilities/text_utility.h"
 
namespace mcrl2 {
 
namespace utilities {
 
namespace detail {
 
  // Separates all sections with a keyword from the other keyword sections
  // Returns a pair containing consisiting of the keyword section and the other keyword sections
  inline
  std::pair<std::string, std::string> separate_keyword_section(const std::string& text1, const std::string& keyword, const std::vector<std::string>& all_keywords, bool repeat_keyword = false)
  {
    std::string text = boost::trim_copy(text1);
    std::ostringstream out1; // will contain the keyword sections
    std::ostringstream out2; // will contain the other keyword sections
 
    std::string regex_keyword = "\\b" + keyword + "\\b";
    // create a regex that looks like this: "(\\beqn\\b)|(\\bcons\\b)|(\\bmap\\b)|(\\bvar\\b)"
    std::vector<std::string> v = all_keywords;
    v.erase(std::remove(v.begin(), v.end(), keyword), v.end()); // erase keyword from v
    for (std::string& s: v)
    {
      s = "(\\b" + s + "\\b)";
    }
    std::string regex_other_keywords = boost::algorithm::join(v, "|");
 
    std::vector<std::string> specs = utilities::regex_split(text, regex_keyword);
    if (text.find(keyword) != 0 && !specs.empty())
    {
      out2 << specs.front() << std::endl;
      specs.erase(specs.begin());
    }
    for (const std::string& spec: specs)
    {
      // strip trailing map/cons/var/eqn declarations
      std::vector<std::string> v = utilities::regex_split(spec, regex_other_keywords);
      if (!v.empty())
      {
        if (repeat_keyword)
        {
          out1 << "\n" << keyword;
        }
        out1 << "  " << v.front();
        out2 << spec.substr(v.front().size());
      }
    }
    std::string s1 = out1.str();
    if (!s1.empty())
    {
      if (!repeat_keyword)
      {
        s1 = keyword + "\n" + s1;
      }
    }
    return std::make_pair(s1 + "\n", out2.str() + "\n");
  }
 
} // namespace detail
 
} // namespace utilities
 
} // namespace mcrl2
 
#endif // MCRL2_UTILITIES_DETAIL_SEPARATE_KEYWORD_SECTION_H