generated_message_tctable_decl.h | Explore in Territory

// Protocol Buffers - Google's data interchange format
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// This file contains declarations needed in generated headers for messages
// that use tail-call table parsing. Everything in this file is for internal
// use only.

#ifndef GOOGLE_PROTOBUF_GENERATED_MESSAGE_TCTABLE_DECL_H__
#define GOOGLE_PROTOBUF_GENERATED_MESSAGE_TCTABLE_DECL_H__

#include <array>
#include <cstddef>
#include <cstdint>
#include <type_traits>

#include <google/protobuf/message_lite.h>
#include <google/protobuf/parse_context.h>

// Must come last:
#include <google/protobuf/port_def.inc>

namespace google {
namespace protobuf {
namespace internal {

// Additional information about this field:
struct TcFieldData { … };

struct TcParseTableBase;

// TailCallParseFunc is the function pointer type used in the tailcall table.
TailCallParseFunc;

namespace field_layout {
struct Offset { … };
}  // namespace field_layout

#if defined(_MSC_VER) && !defined(_WIN64)
#pragma warning(push)
// TcParseTableBase is intentionally overaligned on 32 bit targets.
#pragma warning(disable : 4324)
#endif

// Base class for message-level table with info for the tail-call parser.
struct alignas(uint64_t) TcParseTableBase { … };

#if defined(_MSC_VER) && !defined(_WIN64)
#pragma warning(pop)
#endif

static_assert …;
static_assert …;

template <size_t kFastTableSizeLog2, size_t kNumFieldEntries = 0,
          size_t kNumFieldAux = 0, size_t kNameTableSize = 0,
          size_t kFieldLookupSize = 2>
struct TcParseTable { … };

// Partial specialization: if there are no aux entries, there will be no array.
// In C++, arrays cannot have length 0, but (C++11) std::array<T, 0> is valid.
// However, different implementations have different sizeof(std::array<T, 0>).
// Skipping the member makes offset computations portable.
TcParseTable<kFastTableSizeLog2, kNumFieldEntries, 0, kNameTableSize, kFieldLookupSize>;

// Partial specialization: if there are no fields at all, then we can save space
// by skipping the field numbers and entries.
TcParseTable<0, 0, 0, kNameTableSize, kFieldLookupSize>;

static_assert …;

static_assert …;

}  // namespace internal
}  // namespace protobuf
}  // namespace google

#include <google/protobuf/port_undef.inc>

#endif  // GOOGLE_PROTOBUF_GENERATED_MESSAGE_TCTABLE_DECL_H__
chromium/third_party/protobuf/src/google/protobuf/generated_message_tctable_decl.h
