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// 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.
#include "base/types/struct_type.h"
#include <string>
#include <utility>
#include "absl/base/macros.h"
#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "absl/types/variant.h"
#include "internal/overloaded.h"
#include "internal/status_macros.h"
namespace cel {
CEL_INTERNAL_TYPE_IMPL(StructType);
bool operator<(const StructType::FieldId& lhs, const StructType::FieldId& rhs) {
return absl::visit(
internal::Overloaded{
[&rhs](absl::string_view lhs_name) {
return absl::visit(
internal::Overloaded{// (absl::string_view, absl::string_view)
[lhs_name](absl::string_view rhs_name) {
return lhs_name < rhs_name;
},
// (absl::string_view, int64_t)
[](int64_t rhs_number) { return false; }},
rhs.data_);
},
[&rhs](int64_t lhs_number) {
return absl::visit(
internal::Overloaded{
// (int64_t, absl::string_view)
[](absl::string_view rhs_name) { return true; },
// (int64_t, int64_t)
[lhs_number](int64_t rhs_number) {
return lhs_number < rhs_number;
},
},
rhs.data_);
}},
lhs.data_);
}
std::string StructType::FieldId::DebugString() const {
return absl::visit(
internal::Overloaded{
[](absl::string_view name) { return std::string(name); },
[](int64_t number) { return absl::StrCat(number); }},
data_);
}
#define CEL_INTERNAL_STRUCT_TYPE_DISPATCH(method, ...) \
base_internal::Metadata::IsStoredInline(*this) \
? static_cast<const base_internal::LegacyStructType&>(*this).method( \
__VA_ARGS__) \
: static_cast<const base_internal::AbstractStructType&>(*this).method( \
__VA_ARGS__)
absl::string_view StructType::name() const {
return CEL_INTERNAL_STRUCT_TYPE_DISPATCH(name);
}
size_t StructType::field_count() const {
return CEL_INTERNAL_STRUCT_TYPE_DISPATCH(field_count);
}
std::string StructType::DebugString() const {
return CEL_INTERNAL_STRUCT_TYPE_DISPATCH(DebugString);
}
internal::TypeInfo StructType::TypeId() const {
return CEL_INTERNAL_STRUCT_TYPE_DISPATCH(TypeId);
}
absl::StatusOr<absl::optional<StructType::Field>> StructType::FindFieldByName(
TypeManager& type_manager, absl::string_view name) const {
return CEL_INTERNAL_STRUCT_TYPE_DISPATCH(FindFieldByName, type_manager, name);
}
absl::StatusOr<absl::optional<StructType::Field>> StructType::FindFieldByNumber(
TypeManager& type_manager, int64_t number) const {
return CEL_INTERNAL_STRUCT_TYPE_DISPATCH(FindFieldByNumber, type_manager,
number);
}
absl::StatusOr<UniqueRef<StructType::FieldIterator>>
StructType::NewFieldIterator(MemoryManager& memory_manager) const {
return CEL_INTERNAL_STRUCT_TYPE_DISPATCH(NewFieldIterator, memory_manager);
}
#undef CEL_INTERNAL_STRUCT_TYPE_DISPATCH
struct StructType::FindFieldVisitor final {
const StructType& struct_type;
TypeManager& type_manager;
absl::StatusOr<absl::optional<Field>> operator()(
absl::string_view name) const {
return struct_type.FindFieldByName(type_manager, name);
}
absl::StatusOr<absl::optional<Field>> operator()(int64_t number) const {
return struct_type.FindFieldByNumber(type_manager, number);
}
};
absl::StatusOr<absl::optional<StructType::Field>> StructType::FindField(
TypeManager& type_manager, FieldId id) const {
return absl::visit(FindFieldVisitor{*this, type_manager}, id.data_);
}
absl::StatusOr<StructType::FieldId> StructType::FieldIterator::NextId(
TypeManager& type_manager) {
CEL_ASSIGN_OR_RETURN(auto field, Next(type_manager));
return field.id;
}
absl::StatusOr<absl::string_view> StructType::FieldIterator::NextName(
TypeManager& type_manager) {
CEL_ASSIGN_OR_RETURN(auto field, Next(type_manager));
return field.name;
}
absl::StatusOr<int64_t> StructType::FieldIterator::NextNumber(
TypeManager& type_manager) {
CEL_ASSIGN_OR_RETURN(auto field, Next(type_manager));
return field.number;
}
absl::StatusOr<Handle<Type>> StructType::FieldIterator::NextType(
TypeManager& type_manager) {
CEL_ASSIGN_OR_RETURN(auto field, Next(type_manager));
return std::move(field.type);
}
namespace base_internal {
absl::string_view LegacyStructType::name() const {
return MessageTypeName(msg_);
}
size_t LegacyStructType::field_count() const {
return MessageTypeFieldCount(msg_);
}
absl::StatusOr<UniqueRef<StructType::FieldIterator>>
LegacyStructType::NewFieldIterator(MemoryManager& memory_manager) const {
return absl::UnimplementedError(
"StructType::NewFieldIterator is not supported by legacy struct types");
}
// Always returns an error.
absl::StatusOr<absl::optional<StructType::Field>>
LegacyStructType::FindFieldByName(TypeManager& type_manager,
absl::string_view name) const {
return absl::UnimplementedError(
"Legacy struct type does not support type introspection");
}
// Always returns an error.
absl::StatusOr<absl::optional<StructType::Field>>
LegacyStructType::FindFieldByNumber(TypeManager& type_manager,
int64_t number) const {
return absl::UnimplementedError(
"Legacy struct type does not support type introspection");
}
AbstractStructType::AbstractStructType()
: StructType(), base_internal::HeapData(kKind) {
// Ensure `Type*` and `base_internal::HeapData*` are not thunked.
ABSL_ASSERT(
reinterpret_cast<uintptr_t>(static_cast<Type*>(this)) ==
reinterpret_cast<uintptr_t>(static_cast<base_internal::HeapData*>(this)));
}
} // namespace base_internal
} // namespace cel