cel-cpp/base/types/string_type.h at cpp-sync · cel-expr/cel-cpp

68 lines (48 loc) · 1.65 KB

// Copyright 2022 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_BASE_TYPES_STRING_TYPE_H_
#define THIRD_PARTY_CEL_CPP_BASE_TYPES_STRING_TYPE_H_

#include "absl/log/absl_check.h"
#include "base/kind.h"
#include "base/type.h"

namespace cel {

class StringValue;
class StringWrapperType;

class StringType final : public base_internal::SimpleType<Kind::kString> {
 private:
  using Base = base_internal::SimpleType<Kind::kString>;

 public:
  using Base::kKind;

  using Base::kName;

  using Base::Is;

  static const StringType& Cast(const Type& type) {
    ABSL_DCHECK(Is(type)) << "cannot cast " << type.name() << " to " << kName;
    return static_cast<const StringType&>(type);
  }

  using Base::kind;

  using Base::name;

  using Base::DebugString;

 private:
  friend class StringWrapperType;

  CEL_INTERNAL_SIMPLE_TYPE_MEMBERS(StringType, StringValue);
};

CEL_INTERNAL_SIMPLE_TYPE_STANDALONES(StringType);

namespace base_internal {

template <>
struct TypeTraits<StringType> {
  using value_type = StringValue;
};

}  // namespace base_internal

}  // namespace cel

#endif  // THIRD_PARTY_CEL_CPP_BASE_TYPES_STRING_TYPE_H_

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