ortools-clone/ortools/constraint_solver/solver_parameters.proto

// Copyright 2010-2025 Google LLC
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// This file contains protocol buffers for all parameters of the CP solver.

syntax = "proto3";

option java_package = "com.google.ortools.constraintsolver";
option java_multiple_files = true;
option csharp_namespace = "Google.OrTools.ConstraintSolver";

package operations_research;

// Solver parameters.
message ConstraintSolverParameters {
  //
  // Internal parameters of the solver.
  //
  enum TrailCompression {
    NO_COMPRESSION = 0;
    COMPRESS_WITH_ZLIB = 1;
  }

  // This parameter indicates if the solver should compress the trail
  // during the search. No compression means that the solver will be faster,
  // but will use more memory.
  TrailCompression compress_trail = 1;

  // This parameter indicates the default size of a block of the trail.
  // Compression applies at the block level.
  int32 trail_block_size = 2;

  // When a sum/min/max operation is applied on a large array, this
  // array is recursively split into blocks of size 'array_split_size'.
  int32 array_split_size = 3;

  //
  // Control naming of the variables..
  //

  // This parameters indicates if the solver should store the names of
  // the objets it manages.
  bool store_names = 4;

  // Create names for cast variables.
  bool name_cast_variables = 5;

  // Should anonymous variables be given a name.
  bool name_all_variables = 6;

  //
  // Control monitoring of the solver and the model.
  //

  // Activate propagation profiling.
  bool profile_propagation = 7;

  // Export propagation profiling data to file.
  string profile_file = 8;

  // Activate local search profiling.
  bool profile_local_search = 16;

  // Print local search profiling data after solving.
  bool print_local_search_profile = 17;

  // Activate propagate tracing.
  bool trace_propagation = 9;

  // Trace search.
  bool trace_search = 10;

  // Print the model before solving.
  bool print_model = 11;

  // Print model statistics before solving.
  bool print_model_stats = 12;

  // Print added constraints.
  bool print_added_constraints = 13;

  //
  // Control search.
  //

  // Disable solving.

  bool disable_solve = 15;

  // The following flags are meant for internal use only.

  //
  // Control the implementation of the table constraint.
  //
  bool use_small_table = 101;
  reserved 100, 102, 103, 104;

  //
  // Control the propagation of the cumulative constraint.
  //
  bool use_cumulative_edge_finder = 105;
  bool use_cumulative_time_table = 106;
  bool use_cumulative_time_table_sync = 112;
  bool use_sequence_high_demand_tasks = 107;
  bool use_all_possible_disjunctions = 108;
  int32 max_edge_finder_size = 109;

  //
  // Control the propagation of the diffn constraint.
  //
  bool diffn_use_cumulative = 110;

  //
  // Control the implementation of the element constraint.
  //
  bool use_element_rmq = 111;

  //
  // Skip locally optimal pairs of paths in PathOperators. Setting this
  // parameter to true might skip valid neighbors if there are constraints
  // linking paths together (such as precedences). In any other case this
  // should only speed up the search without omitting any neighbors.
  //
  bool skip_locally_optimal_paths = 113;

  //
  // Control the behavior of local search.
  //
  int32 check_solution_period = 114;
}