// Copyright 2021 The Tint Authors.
//
// 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.

#ifndef FUZZERS_TINT_AST_FUZZER_MUTATION_FINDERS_REPLACE_IDENTIFIERS_H_
#define FUZZERS_TINT_AST_FUZZER_MUTATION_FINDERS_REPLACE_IDENTIFIERS_H_

#include "fuzzers/tint_ast_fuzzer/mutation_finder.h"

namespace tint {
namespace fuzzers {
namespace ast_fuzzer {

/// Looks for opportunities to apply `MutationReplaceIdentifier`.
///
/// Concretely, for each variable in the module, tries to replace its users with
/// the uses of some other variables.
class MutationFinderReplaceIdentifiers : public MutationFinder {
 public:
  MutationList FindMutations(
      const tint::Program& program,
      const NodeIdMap& node_id_map,
      ProbabilityContext* probability_context) const override;
  uint32_t GetChanceOfApplyingMutation(
      ProbabilityContext* probability_context) const override;
};

}  // namespace ast_fuzzer
}  // namespace fuzzers
}  // namespace tint

#endif  // FUZZERS_TINT_AST_FUZZER_MUTATION_FINDERS_REPLACE_IDENTIFIERS_H_