Line data    Source code

       1             : // Author(s): Wieger Wesselink
       2             : // Copyright: see the accompanying file COPYING or copy at
       3             : // https://github.com/mCRL2org/mCRL2/blob/master/COPYING
       4             : //
       5             : // Distributed under the Boost Software License, Version 1.0.
       6             : // (See accompanying file LICENSE_1_0.txt or copy at
       7             : // http://www.boost.org/LICENSE_1_0.txt)
       8             : //
       9             : /// \file mcrl2/pbes/detail/lps2pbes_utility.h
      10             : /// \brief add your file description here.
      11             : 
      12             : #ifndef MCRL2_PBES_DETAIL_LPS2PBES_UTILITY_H
      13             : #define MCRL2_PBES_DETAIL_LPS2PBES_UTILITY_H
      14             : 
      15             : #include "mcrl2/data/substitutions/mutable_map_substitution.h"
      16             : #include "mcrl2/modal_formula/state_formula.h"
      17             : #include "mcrl2/pbes/pbes.h"
      18             : 
      19             : namespace mcrl2 {
      20             : 
      21             : namespace pbes_system {
      22             : 
      23             : /// \cond INTERNAL_DOCS
      24             : //
      25             : /// \brief Concatenates two sequences of PBES equations
      26             : /// \param p A sequence of PBES equations
      27             : /// \param q A sequence of PBES equations
      28             : /// \return The concatenation result
      29             : inline
      30         122 : std::vector<pbes_equation> operator+(const std::vector<pbes_equation>& p, const std::vector<pbes_equation>& q)
      31             : {
      32         122 :   std::vector<pbes_equation> result(p);
      33         122 :   result.insert(result.end(), q.begin(), q.end());
      34         122 :   return result;
      35           0 : }
      36             : /// \endcond
      37             : 
      38             : /// \cond INTERNAL_DOCS
      39             : //
      40             : /// \brief Appends a PBES equation to a sequence of PBES equations
      41             : /// \param p A sequence of PBES equations
      42             : /// \param e A PBES equation
      43             : /// \return The append result
      44             : inline
      45             : std::vector<pbes_equation> operator+(const std::vector<pbes_equation>& p, const pbes_equation& e)
      46             : {
      47             :   std::vector<pbes_equation> result(p);
      48             :   result.push_back(e);
      49             :   return result;
      50             : }
      51             : /// \endcond
      52             : 
      53             : namespace detail {
      54             : 
      55             : inline
      56         200 : data::variable_list lhs_variables(const data::assignment_list& l)
      57             : {
      58         200 :   data::variable_list result;
      59         209 :   for (const data::assignment& a: l)
      60             :   {
      61           9 :     result.push_front(a.lhs());
      62             :   }
      63         400 :   return atermpp::reverse(result);
      64         200 : }
      65             : 
      66             : inline
      67         291 : data::data_expression_list rhs_expressions(const data::assignment_list& l)
      68             : {
      69         291 :   data::data_expression_list result;
      70         300 :   for (const data::assignment& a: l)
      71             :   {
      72           9 :     result.push_front(a.rhs());
      73             :   }
      74         582 :   return atermpp::reverse(result);
      75         291 : }
      76             : 
      77             : inline
      78         141 : const core::identifier_string& mu_name(const state_formulas::state_formula& f)
      79             : {
      80         141 :   if (state_formulas::is_mu(f))
      81             :   {
      82          21 :     const auto& g = atermpp::down_cast<state_formulas::mu>(f);
      83          21 :     return g.name();
      84             :   }
      85             :   else
      86             :   {
      87         120 :     const auto& g = atermpp::down_cast<state_formulas::nu>(f);
      88         120 :     return g.name();
      89             :   }
      90             : }
      91             : 
      92             : /// \brief Returns the variables corresponding to ass(f)
      93             : /// \param f A modal formula
      94             : /// \return The variables corresponding to ass(f)
      95             : inline
      96         200 : data::variable_list mu_variables(const state_formulas::state_formula& f)
      97             : {
      98         200 :   assert(state_formulas::is_mu(f) || state_formulas::is_nu(f));
      99         200 :   if (state_formulas::is_mu(f))
     100             :   {
     101          52 :     const auto& g = atermpp::down_cast<state_formulas::mu>(f);
     102          52 :     return lhs_variables(g.assignments());
     103             :   }
     104             :   else
     105             :   {
     106         148 :     const auto& g = atermpp::down_cast<state_formulas::nu>(f);
     107         148 :     return lhs_variables(g.assignments());
     108             :   }
     109             : }
     110             : 
     111             : /// \brief Returns the data expressions corresponding to ass(f)
     112             : /// \param f A modal formula
     113             : /// \return The data expressions corresponding to ass(f)
     114             : inline
     115         291 : data::data_expression_list mu_expressions(const state_formulas::state_formula& f)
     116             : {
     117         291 :   assert(state_formulas::is_mu(f) || state_formulas::is_nu(f));
     118         291 :   if (state_formulas::is_mu(f))
     119             :   {
     120          79 :     const auto& g = atermpp::down_cast<state_formulas::mu>(f);
     121          79 :     return rhs_expressions(g.assignments());
     122             :   }
     123             :   else
     124             :   {
     125         212 :     const auto& g = atermpp::down_cast<state_formulas::nu>(f);
     126         212 :     return rhs_expressions(g.assignments());
     127             :   }
     128             : }
     129             : 
     130             : inline
     131             : std::string myprint(const std::vector<pbes_equation>& v)
     132             : {
     133             :   std::ostringstream out;
     134             :   out << "[";
     135             :   for (const pbes_equation& eqn: v)
     136             :   {
     137             :     out << "\n  " << pbes_system::pp(eqn.symbol()) << " " << pbes_system::pp(eqn.variable()) << " = " << pbes_system::pp(eqn.formula());
     138             :   }
     139             :   out << "\n]";
     140             :   return out.str();
     141             : }
     142             : 
     143             : /// \brief Generates a substitution that assigns fresh variables to the given sequence of variables.
     144             : /// The identifier generator is used to assign names to the fresh variables.
     145             : /// Caveat: the implementation is very inefficient.
     146             : /// \param update_context If true, then generated names are added to the context
     147             : inline
     148          10 : data::mutable_map_substitution<> make_fresh_variable_substitution(const data::variable_list& variables, data::set_identifier_generator& id_generator, bool add_to_context = true)
     149             : {
     150          10 :   data::mutable_map_substitution<> result;
     151          20 :   for (const data::variable& v: variables)
     152             :   {
     153          10 :     core::identifier_string name =  id_generator(std::string(v.name()));
     154          10 :     result[v] = data::variable(name, v.sort());
     155          10 :     if (!add_to_context)
     156             :     {
     157           9 :       id_generator.remove_identifier(name);
     158             :     }
     159          10 :   }
     160          10 :   return result;
     161           0 : }
     162             : 
     163             : } // namespace detail
     164             : 
     165             : } // namespace pbes_system
     166             : 
     167             : } // namespace mcrl2
     168             : 
     169             : #endif // MCRL2_PBES_DETAIL_LPS2PBES_UTILITY_H