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// Copyright 2023 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/value.h"
// IWYU pragma: friend "common/value.h"
#ifndef THIRD_PARTY_CEL_CPP_COMMON_VALUES_STRING_VALUE_H_
#define THIRD_PARTY_CEL_CPP_COMMON_VALUES_STRING_VALUE_H_
#include <cstddef>
#include <ostream>
#include <string>
#include <type_traits>
#include <utility>
#include "absl/base/attributes.h"
#include "absl/meta/type_traits.h"
#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "absl/strings/cord.h"
#include "absl/strings/string_view.h"
#include "common/any.h"
#include "common/internal/arena_string.h"
#include "common/internal/shared_byte_string.h"
#include "common/json.h"
#include "common/type.h"
#include "common/type_manager.h"
#include "common/value_kind.h"
#include "common/values/values.h"
namespace cel {
class Value;
class ValueView;
class ValueManager;
class StringValue;
class StringValueView;
class TypeManager;
// `StringValue` represents values of the primitive `string` type.
class StringValue final {
public:
using view_alternative_type = StringValueView;
static constexpr ValueKind kKind = ValueKind::kString;
static StringValue Concat(ValueManager&, StringValueView lhs,
StringValueView rhs);
explicit StringValue(absl::Cord value) noexcept : value_(std::move(value)) {}
explicit StringValue(absl::string_view value) noexcept
: value_(absl::Cord(value)) {}
explicit StringValue(common_internal::ArenaString value) noexcept
: value_(value) {}
explicit StringValue(common_internal::SharedByteString value) noexcept
: value_(std::move(value)) {}
template <typename T, typename = std::enable_if_t<std::is_same_v<
absl::remove_cvref_t<T>, std::string>>>
explicit StringValue(T&& data) : value_(absl::Cord(std::forward<T>(data))) {}
// Clang exposes `__attribute__((enable_if))` which can be used to detect
// compile time string constants. When available, we use this to avoid
// unnecessary copying as `StringValue(absl::string_view)` makes a copy.
#if ABSL_HAVE_ATTRIBUTE(enable_if)
template <size_t N>
explicit StringValue(const char (&data)[N])
__attribute__((enable_if(::cel::common_internal::IsStringLiteral(data),
"chosen when 'data' is a string literal")))
: value_(absl::string_view(data)) {}
#endif
explicit StringValue(StringValueView value) noexcept;
StringValue() = default;
StringValue(const StringValue&) = default;
StringValue(StringValue&&) = default;
StringValue& operator=(const StringValue&) = default;
StringValue& operator=(StringValue&&) = default;
constexpr ValueKind kind() const { return kKind; }
StringType GetType(TypeManager&) const { return StringType(); }
absl::string_view GetTypeName() const { return StringType::kName; }
std::string DebugString() const;
absl::StatusOr<size_t> GetSerializedSize(AnyToJsonConverter&) const;
absl::Status SerializeTo(AnyToJsonConverter&, absl::Cord& value) const;
absl::StatusOr<absl::Cord> Serialize(AnyToJsonConverter&) const;
absl::StatusOr<std::string> GetTypeUrl(
absl::string_view prefix = kTypeGoogleApisComPrefix) const;
absl::StatusOr<Any> ConvertToAny(
AnyToJsonConverter&,
absl::string_view prefix = kTypeGoogleApisComPrefix) const;
absl::StatusOr<Json> ConvertToJson(AnyToJsonConverter&) const;
absl::StatusOr<ValueView> Equal(ValueManager& value_manager, ValueView other,
Value& scratch
ABSL_ATTRIBUTE_LIFETIME_BOUND) const;
absl::StatusOr<Value> Equal(ValueManager& value_manager,
ValueView other) const;
bool IsZeroValue() const {
return NativeValue([](const auto& value) -> bool { return value.empty(); });
}
std::string NativeString() const { return value_.ToString(); }
absl::string_view NativeString(
std::string& scratch
ABSL_ATTRIBUTE_LIFETIME_BOUND) const ABSL_ATTRIBUTE_LIFETIME_BOUND {
return value_.ToString(scratch);
}
absl::Cord NativeCord() const { return value_.ToCord(); }
template <typename Visitor>
std::common_type_t<std::invoke_result_t<Visitor, absl::string_view>,
std::invoke_result_t<Visitor, const absl::Cord&>>
NativeValue(Visitor&& visitor) const {
return value_.Visit(std::forward<Visitor>(visitor));
}
void swap(StringValue& other) noexcept {
using std::swap;
swap(value_, other.value_);
}
size_t Size() const;
bool IsEmpty() const;
bool Equals(absl::string_view string) const;
bool Equals(const absl::Cord& string) const;
bool Equals(StringValueView string) const;
int Compare(absl::string_view string) const;
int Compare(const absl::Cord& string) const;
int Compare(StringValueView string) const;
std::string ToString() const { return NativeString(); }
absl::Cord ToCord() const { return NativeCord(); }
template <typename H>
friend H AbslHashValue(H state, const StringValue& string) {
return H::combine(std::move(state), string.value_);
}
friend bool operator==(const StringValue& lhs, const StringValue& rhs) {
return lhs.value_ == rhs.value_;
}
friend bool operator<(const StringValue& lhs, const StringValue& rhs) {
return lhs.value_ < rhs.value_;
}
private:
friend class StringValueView;
friend const common_internal::SharedByteString&
common_internal::AsSharedByteString(const StringValue& value);
common_internal::SharedByteString value_;
};
inline void swap(StringValue& lhs, StringValue& rhs) noexcept { lhs.swap(rhs); }
inline bool operator==(const StringValue& lhs, absl::string_view rhs) {
return lhs.Equals(rhs);
}
inline bool operator==(absl::string_view lhs, const StringValue& rhs) {
return rhs == lhs;
}
inline bool operator!=(const StringValue& lhs, absl::string_view rhs) {
return !operator==(lhs, rhs);
}
inline bool operator!=(absl::string_view lhs, const StringValue& rhs) {
return !operator==(lhs, rhs);
}
inline bool operator!=(const StringValue& lhs, const StringValue& rhs) {
return !operator==(lhs, rhs);
}
inline std::ostream& operator<<(std::ostream& out, const StringValue& value) {
return out << value.DebugString();
}
class StringValueView final {
public:
using alternative_type = StringValue;
static constexpr ValueKind kKind = StringValue::kKind;
explicit StringValueView(
const absl::Cord& value ABSL_ATTRIBUTE_LIFETIME_BOUND) noexcept
: value_(value) {}
explicit StringValueView(absl::string_view value) noexcept : value_(value) {}
explicit StringValueView(common_internal::ArenaString value) noexcept
: value_(value) {}
explicit StringValueView(common_internal::SharedByteStringView value) noexcept
: value_(value) {}
// NOLINTNEXTLINE(google-explicit-constructor)
StringValueView(
const StringValue& value ABSL_ATTRIBUTE_LIFETIME_BOUND) noexcept
: value_(value.value_) {}
// NOLINTNEXTLINE(google-explicit-constructor)
StringValueView& operator=(
const StringValue& value ABSL_ATTRIBUTE_LIFETIME_BOUND) {
value_ = value.value_;
return *this;
}
StringValueView& operator=(StringValue&&) = delete;
StringValueView() = default;
StringValueView(const StringValueView&) = default;
StringValueView(StringValueView&&) = default;
StringValueView& operator=(const StringValueView&) = default;
StringValueView& operator=(StringValueView&&) = default;
constexpr ValueKind kind() const { return kKind; }
StringType GetType(TypeManager&) const { return StringType(); }
absl::string_view GetTypeName() const { return StringType::kName; }
std::string DebugString() const;
absl::StatusOr<size_t> GetSerializedSize(AnyToJsonConverter&) const;
absl::Status SerializeTo(AnyToJsonConverter&, absl::Cord& value) const;
absl::StatusOr<absl::Cord> Serialize(AnyToJsonConverter&) const;
absl::StatusOr<std::string> GetTypeUrl(
absl::string_view prefix = kTypeGoogleApisComPrefix) const;
absl::StatusOr<Any> ConvertToAny(
AnyToJsonConverter&,
absl::string_view prefix = kTypeGoogleApisComPrefix) const;
absl::StatusOr<Json> ConvertToJson(AnyToJsonConverter&) const;
absl::StatusOr<ValueView> Equal(ValueManager& value_manager, ValueView other,
Value& scratch
ABSL_ATTRIBUTE_LIFETIME_BOUND) const;
absl::StatusOr<Value> Equal(ValueManager& value_manager,
ValueView other) const;
bool IsZeroValue() const {
return NativeValue([](const auto& value) -> bool { return value.empty(); });
}
std::string NativeString() const { return value_.ToString(); }
absl::string_view NativeString(
std::string& scratch
ABSL_ATTRIBUTE_LIFETIME_BOUND) const ABSL_ATTRIBUTE_LIFETIME_BOUND {
return value_.ToString(scratch);
}
absl::Cord NativeCord() const { return value_.ToCord(); }
template <typename Visitor>
std::common_type_t<std::invoke_result_t<Visitor, absl::string_view>,
std::invoke_result_t<Visitor, const absl::Cord&>>
NativeValue(Visitor&& visitor) const {
return value_.Visit(std::forward<Visitor>(visitor));
}
void swap(StringValueView& other) noexcept {
using std::swap;
swap(value_, other.value_);
}
size_t Size() const;
bool IsEmpty() const;
bool Equals(absl::string_view string) const;
bool Equals(const absl::Cord& string) const;
bool Equals(StringValueView string) const;
int Compare(absl::string_view string) const;
int Compare(const absl::Cord& string) const;
int Compare(StringValueView string) const;
std::string ToString() const { return NativeString(); }
absl::Cord ToCord() const { return NativeCord(); }
template <typename H>
friend H AbslHashValue(H state, StringValueView string) {
return H::combine(std::move(state), string.value_);
}
friend bool operator==(StringValueView lhs, StringValueView rhs) {
return lhs.value_ == rhs.value_;
}
friend bool operator<(StringValueView lhs, StringValueView rhs) {
return lhs.value_ < rhs.value_;
}
private:
friend class StringValue;
friend common_internal::SharedByteStringView
common_internal::AsSharedByteStringView(StringValueView value);
common_internal::SharedByteStringView value_;
};
inline void swap(StringValueView& lhs, StringValueView& rhs) noexcept {
lhs.swap(rhs);
}
inline bool operator==(StringValueView lhs, absl::string_view rhs) {
return lhs == StringValueView(rhs);
}
inline bool operator==(absl::string_view lhs, StringValueView rhs) {
return StringValueView(lhs) == rhs;
}
inline bool operator==(StringValueView lhs, const absl::Cord& rhs) {
return lhs == StringValueView(rhs);
}
inline bool operator==(const absl::Cord& lhs, StringValueView rhs) {
return StringValueView(lhs) == rhs;
}
inline bool operator!=(StringValueView lhs, StringValueView rhs) {
return !operator==(lhs, rhs);
}
inline bool operator!=(StringValueView lhs, absl::string_view rhs) {
return !operator==(lhs, rhs);
}
inline bool operator!=(absl::string_view lhs, StringValueView rhs) {
return !operator==(lhs, rhs);
}
inline bool operator!=(StringValueView lhs, const absl::Cord& rhs) {
return !operator==(lhs, rhs);
}
inline bool operator!=(const absl::Cord& lhs, StringValueView rhs) {
return !operator==(lhs, rhs);
}
inline bool operator<(StringValueView lhs, absl::string_view rhs) {
return lhs < StringValueView(rhs);
}
inline bool operator<(absl::string_view lhs, StringValueView rhs) {
return StringValueView(lhs) < rhs;
}
inline bool operator<(StringValueView lhs, const absl::Cord& rhs) {
return lhs < StringValueView(rhs);
}
inline bool operator<(const absl::Cord& lhs, StringValueView rhs) {
return StringValueView(lhs) < rhs;
}
inline std::ostream& operator<<(std::ostream& out, StringValueView value) {
return out << value.DebugString();
}
inline StringValue::StringValue(StringValueView value) noexcept
: value_(value.value_) {}
inline StringValue StringValue::Concat(ValueManager&, StringValueView lhs,
StringValueView rhs) {
absl::Cord result;
result.Append(lhs.ToCord());
result.Append(rhs.ToCord());
return StringValue(std::move(result));
}
namespace common_internal {
inline const SharedByteString& AsSharedByteString(const StringValue& value) {
return value.value_;
}
inline SharedByteStringView AsSharedByteStringView(StringValueView value) {
return value.value_;
}
} // namespace common_internal
} // namespace cel
#endif // THIRD_PARTY_CEL_CPP_COMMON_VALUES_STRING_VALUE_H_