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// 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.
// CEL does not support calling the parser during C++ static initialization.
// Callers must ensure the parser is only invoked after C++ static initializers
// are run. Failing to do so is undefined behavior. The current reason for this
// is the parser uses ANTLRv4, which also makes no guarantees about being safe
// with regard to C++ static initialization. As such, neither do we.
#ifndef THIRD_PARTY_CEL_CPP_PARSER_PARSER_H_
#define THIRD_PARTY_CEL_CPP_PARSER_PARSER_H_
#include <memory>
#include <utility>
#include <vector>
#include "cel/expr/syntax.pb.h"
#include "absl/status/statusor.h"
#include "absl/strings/string_view.h"
#include "common/source.h"
#include "parser/macro.h"
#include "parser/macro_registry.h"
#include "parser/options.h"
#include "parser/parser_interface.h"
#include "parser/source_factory.h"
namespace google::api::expr::parser {
class VerboseParsedExpr {
public:
VerboseParsedExpr(cel::expr::ParsedExpr parsed_expr,
EnrichedSourceInfo enriched_source_info)
: parsed_expr_(std::move(parsed_expr)),
enriched_source_info_(std::move(enriched_source_info)) {}
const cel::expr::ParsedExpr& parsed_expr() const {
return parsed_expr_;
}
const EnrichedSourceInfo& enriched_source_info() const {
return enriched_source_info_;
}
private:
cel::expr::ParsedExpr parsed_expr_;
EnrichedSourceInfo enriched_source_info_;
};
// See comments at the top of the file for information about usage during C++
// static initialization.
absl::StatusOr<VerboseParsedExpr> EnrichedParse(
absl::string_view expression, const std::vector<Macro>& macros,
absl::string_view description = "<input>",
const ParserOptions& options = ParserOptions());
// See comments at the top of the file for information about usage during C++
// static initialization.
absl::StatusOr<cel::expr::ParsedExpr> Parse(
absl::string_view expression, absl::string_view description = "<input>",
const ParserOptions& options = ParserOptions());
// See comments at the top of the file for information about usage during C++
// static initialization.
absl::StatusOr<cel::expr::ParsedExpr> ParseWithMacros(
absl::string_view expression, const std::vector<Macro>& macros,
absl::string_view description = "<input>",
const ParserOptions& options = ParserOptions());
// See comments at the top of the file for information about usage during C++
// static initialization.
absl::StatusOr<VerboseParsedExpr> EnrichedParse(
const cel::Source& source, const cel::MacroRegistry& registry,
const ParserOptions& options = ParserOptions());
// See comments at the top of the file for information about usage during C++
// static initialization.
absl::StatusOr<cel::expr::ParsedExpr> Parse(
const cel::Source& source, const cel::MacroRegistry& registry,
const ParserOptions& options = ParserOptions());
} // namespace google::api::expr::parser
namespace cel {
// Creates a new parser builder.
//
// Intended for use with the Compiler class, most users should prefer the free
// functions above for independent parsing of expressions.
std::unique_ptr<ParserBuilder> NewParserBuilder(
const ParserOptions& options = {});
} // namespace cel
#endif // THIRD_PARTY_CEL_CPP_PARSER_PARSER_H_