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/data/substitutions/assignment_sequence_substitution.h
      10             : /// \brief add your file description here.
      11             : 
      12             : #ifndef MCRL2_DATA_SUBSTITUTIONS_ASSIGNMENT_SEQUENCE_SUBSTITUTION_H
      13             : #define MCRL2_DATA_SUBSTITUTIONS_ASSIGNMENT_SEQUENCE_SUBSTITUTION_H
      14             : 
      15             : #include "mcrl2/data/assignment.h"
      16             : #include "mcrl2/data/is_simple_substitution.h"
      17             : 
      18             : namespace mcrl2 {
      19             : 
      20             : namespace data {
      21             : 
      22             : /// \brief Substitution that maps data variables to data expressions. The substitution is stored as an
      23             : /// assignment_list.
      24             : struct assignment_sequence_substitution
      25             : {
      26             :   using variable_type = variable;
      27             :   using expression_type = data_expression;
      28             :   using argument_type = variable;
      29             :   using result_type = data_expression;
      30             : 
      31             :   const assignment_list& assignments;
      32             : 
      33        3291 :   explicit assignment_sequence_substitution(const assignment_list& assignments_)
      34        3291 :     : assignments(assignments_)
      35        3291 :   {}
      36             : 
      37       25188 :   const data_expression& operator()(const variable& v) const
      38             :   {
      39       86799 :     for (const assignment& a: assignments)
      40             :     {
      41       70699 :       if (a.lhs() == v)
      42             :       {
      43        9088 :         return a.rhs();
      44             :       }
      45             :     }
      46       16100 :     return v;
      47             :   }
      48             : };
      49             : 
      50             : template <>
      51             : inline
      52             : bool is_simple_substitution(const assignment_sequence_substitution& sigma)
      53             : {
      54             :   for (const assignment& a: sigma.assignments)
      55             :   {
      56             :     if (!is_simple_substitution(a.lhs(), a.rhs()))
      57             :     {
      58             :       return false;
      59             :     }
      60             :   }
      61             :   return true;
      62             : }
      63             : 
      64             : } // namespace data
      65             : 
      66             : } // namespace mcrl2
      67             : 
      68             : #endif // MCRL2_DATA_SUBSTITUTIONS_ASSIGNMENT_SEQUENCE_SUBSTITUTION_H