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       1                 :            : /******************************************************************************
       2                 :            :  * Top contributors (to current version):
       3                 :            :  *   Andrew Reynolds
       4                 :            :  *
       5                 :            :  * This file is part of the cvc5 project.
       6                 :            :  *
       7                 :            :  * Copyright (c) 2009-2025 by the authors listed in the file AUTHORS
       8                 :            :  * in the top-level source directory and their institutional affiliations.
       9                 :            :  * All rights reserved.  See the file COPYING in the top-level source
      10                 :            :  * directory for licensing information.
      11                 :            :  * ****************************************************************************
      12                 :            :  *
      13                 :            :  * The solver for find-synth queries.
      14                 :            :  */
      15                 :            : 
      16                 :            : #include "cvc5_private.h"
      17                 :            : 
      18                 :            : #ifndef CVC5__SMT__FIND_SYNTH_SOLVER_H
      19                 :            : #define CVC5__SMT__FIND_SYNTH_SOLVER_H
      20                 :            : 
      21                 :            : #include "smt/env_obj.h"
      22                 :            : #include "theory/quantifiers/sygus/synth_finder.h"
      23                 :            : 
      24                 :            : namespace cvc5::internal {
      25                 :            : namespace smt {
      26                 :            : 
      27                 :            : /**
      28                 :            :  * Find synthesis solver, which is responsible for implementing find-synth.
      29                 :            :  * It initializes (possibly mulitiple) sygus enumerators and runs them in
      30                 :            :  * an interleaved fashion until one returns a solution.
      31                 :            :  */
      32                 :            : class FindSynthSolver : protected EnvObj
      33                 :            : {
      34                 :            :  public:
      35                 :            :   FindSynthSolver(Env& env);
      36                 :        116 :   ~FindSynthSolver() {}
      37                 :            :   /**
      38                 :            :    * Find synth for the given target and (possibly multiple) grammars. Returns
      39                 :            :    * the result of the find-synth query.
      40                 :            :    */
      41                 :            :   Node findSynth(modes::FindSynthTarget fst, const std::vector<TypeNode>& gtns);
      42                 :            :   /**
      43                 :            :    * Find synth next, which gets the next solution after a successful call to
      44                 :            :    * findSynth above.
      45                 :            :    */
      46                 :            :   Node findSynthNext();
      47                 :            : 
      48                 :            :  private:
      49                 :            :   /**
      50                 :            :    * The synthesis finder utilities that are active. These are initialized
      51                 :            :    * for each type node in gtns called by findSynth above.
      52                 :            :    */
      53                 :            :   std::vector<std::unique_ptr<theory::quantifiers::SynthFinder>> d_sfinders;
      54                 :            :   /** finished indices */
      55                 :            :   std::unordered_set<size_t> d_finished;
      56                 :            :   /**  Current index in d_sfinders we are looking at.*/
      57                 :            :   size_t d_currIndex;
      58                 :            :   /** The current target we are given as input */
      59                 :            :   modes::FindSynthTarget d_fst;
      60                 :            : };
      61                 :            : 
      62                 :            : }  // namespace smt
      63                 :            : }  // namespace cvc5::internal
      64                 :            : 
      65                 :            : #endif /* CVC5__SMT__FIND_SYNTH_SOLVER_H */