// Copyright 2021 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

//

// https://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 THIRD_PARTY_CEL_CPP_PARSER_OPTIONS_H_

#define THIRD_PARTY_CEL_CPP_PARSER_OPTIONS_H_

#include "absl/base/attributes.h"

#include "parser/internal/options.h"

namespace cel {

// Options for configuring the limits and features of the parser.

struct ParserOptions final {

// Limit of the number of error recovery attempts made by the ANTLR parser

// when processing an input. This limit, when reached, will halt further

// parsing of the expression.

int error_recovery_limit = ::cel_parser_internal::kDefaultErrorRecoveryLimit;

// Limit on the amount of recusive parse instructions permitted when building

// the abstract syntax tree for the expression. This prevents pathological

// inputs from causing stack overflows.

int max_recursion_depth = ::cel_parser_internal::kDefaultMaxRecursionDepth;

// Limit on the number of codepoints in the input string which the parser will

// attempt to parse.

int expression_size_codepoint_limit =

::cel_parser_internal::kExpressionSizeCodepointLimit;

// Limit on the number of lookahead tokens to consume when attempting to

// recover from an error.

int error_recovery_token_lookahead_limit =

::cel_parser_internal::kDefaultErrorRecoveryTokenLookaheadLimit;

// Add macro calls to macro_calls list in source_info.

bool add_macro_calls = ::cel_parser_internal::kDefaultAddMacroCalls;

};

} // namespace cel

namespace google::api::expr::parser {

using ParserOptions = ::cel::ParserOptions;

ABSL_DEPRECATED("Use ParserOptions().error_recovery_limit instead.")

inline constexpr int kDefaultErrorRecoveryLimit =

::cel_parser_internal::kDefaultErrorRecoveryLimit;

ABSL_DEPRECATED("Use ParserOptions().max_recursion_depth instead.")

inline constexpr int kDefaultMaxRecursionDepth =

::cel_parser_internal::kDefaultMaxRecursionDepth;

ABSL_DEPRECATED("Use ParserOptions().expression_size_codepoint_limit instead.")

inline constexpr int kExpressionSizeCodepointLimit =

::cel_parser_internal::kExpressionSizeCodepointLimit;

ABSL_DEPRECATED(

"Use ParserOptions().error_recovery_token_lookahead_limit instead.")

inline constexpr int kDefaultErrorRecoveryTokenLookaheadLimit =

::cel_parser_internal::kDefaultErrorRecoveryTokenLookaheadLimit;

ABSL_DEPRECATED("Use ParserOptions().add_macro_calls instead.")

inline constexpr bool kDefaultAddMacroCalls =

::cel_parser_internal::kDefaultAddMacroCalls;

} // namespace google::api::expr::parser

#endif // THIRD_PARTY_CEL_CPP_PARSER_OPTIONS_H_