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// Copyright 2021 The Dawn & Tint Authors
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#ifndef SRC_TINT_FUZZERS_TINT_AST_FUZZER_MUTATIONS_REPLACE_IDENTIFIER_H_
#define SRC_TINT_FUZZERS_TINT_AST_FUZZER_MUTATIONS_REPLACE_IDENTIFIER_H_
#include "src/tint/fuzzers/tint_ast_fuzzer/mutation.h"
#include "src/tint/lang/wgsl/sem/variable.h"
namespace tint::fuzzers::ast_fuzzer {
/// @see MutationReplaceIdentifier::Apply
class MutationReplaceIdentifier : public Mutation {
public:
/// @brief Constructs an instance of this mutation from a protobuf message.
/// @param message - protobuf message
explicit MutationReplaceIdentifier(protobufs::MutationReplaceIdentifier message);
/// @brief Constructor.
/// @param use_id - the id of a variable user.
/// @param replacement_id - the id of a variable to replace the `use_id`.
MutationReplaceIdentifier(uint32_t use_id, uint32_t replacement_id);
/// @copybrief Mutation::IsApplicable
///
/// The mutation is applicable iff:
/// - `use_id` is a valid id of an `ast::IdentifierExpression`, that
/// references a variable.
/// - `replacement_id` is a valid id of an `ast::Variable`.
/// - The identifier expression doesn't reference the variable of a
/// `replacement_id`.
/// - The variable with `replacement_id` is in scope of an identifier
/// expression with `use_id`.
/// - The identifier expression and the variable have the same type.
///
/// @copydetails Mutation::IsApplicable
bool IsApplicable(const tint::Program& program, const NodeIdMap& node_id_map) const override;
/// @copybrief Mutation::Apply
///
/// Replaces the use of an identifier expression with `use_id` with a newly
/// created identifier expression, that references a variable with
/// `replacement_id`. The newly created identifier expression will have the
/// same id as the old one (i.e. `use_id`).
///
/// @copydetails Mutation::Apply
void Apply(const NodeIdMap& node_id_map,
tint::program::CloneContext& clone_context,
NodeIdMap* new_node_id_map) const override;
protobufs::Mutation ToMessage() const override;
private:
protobufs::MutationReplaceIdentifier message_;
};
} // namespace tint::fuzzers::ast_fuzzer
#endif // SRC_TINT_FUZZERS_TINT_AST_FUZZER_MUTATIONS_REPLACE_IDENTIFIER_H_