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// Copyright 2024 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.
// IWYU pragma: private, include "common/type.h"
// IWYU pragma: friend "common/type.h"
#ifndef THIRD_PARTY_CEL_CPP_COMMON_TYPES_FUNCTION_TYPE_H_
#define THIRD_PARTY_CEL_CPP_COMMON_TYPES_FUNCTION_TYPE_H_
#include <ostream>
#include <string>
#include "absl/base/attributes.h"
#include "absl/base/nullability.h"
#include "absl/strings/string_view.h"
#include "absl/types/span.h"
#include "common/type_kind.h"
#include "google/protobuf/arena.h"
namespace cel {
class Type;
class TypeParameters;
namespace common_internal {
struct FunctionTypeData;
} // namespace common_internal
class FunctionType final {
public:
static constexpr TypeKind kKind = TypeKind::kFunction;
static constexpr absl::string_view kName = "function";
FunctionType(google::protobuf::Arena* absl_nonnull arena, const Type& result,
absl::Span<const Type> args);
FunctionType() = default;
FunctionType(const FunctionType&) = default;
FunctionType(FunctionType&&) = default;
FunctionType& operator=(const FunctionType&) = default;
FunctionType& operator=(FunctionType&&) = default;
static TypeKind kind() { return kKind; }
static absl::string_view name() { return kName; }
TypeParameters GetParameters() const ABSL_ATTRIBUTE_LIFETIME_BOUND;
std::string DebugString() const;
const Type& result() const ABSL_ATTRIBUTE_LIFETIME_BOUND;
absl::Span<const Type> args() const ABSL_ATTRIBUTE_LIFETIME_BOUND;
explicit operator bool() const { return data_ != nullptr; }
private:
explicit FunctionType(
const common_internal::FunctionTypeData* absl_nullable data)
: data_(data) {}
const common_internal::FunctionTypeData* absl_nullable data_ = nullptr;
};
bool operator==(const FunctionType& lhs, const FunctionType& rhs);
inline bool operator!=(const FunctionType& lhs, const FunctionType& rhs) {
return !operator==(lhs, rhs);
}
template <typename H>
H AbslHashValue(H state, const FunctionType& type);
inline std::ostream& operator<<(std::ostream& out, const FunctionType& type) {
return out << type.DebugString();
}
} // namespace cel
#endif // THIRD_PARTY_CEL_CPP_COMMON_TYPES_FUNCTION_TYPE_H_