eis/inc/x2struct/x2struct.hpp

563 lines
32 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* Copyright (C) 2019 YY Inc. All rights reserved.
*
* 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
*
* http://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 __X_TO_STRUCT_HPP
#define __X_TO_STRUCT_HPP
#include "config.h"
#ifndef XTOSTRUCT_MACRO_TEST
#include <string>
#include <set>
#include <stdexcept>
#include "traits.h"
#include "util.h"
#include "xreader.h"
#ifdef XTOSTRUCT_JSON
#include "json_reader.h"
#include "json_writer.h"
#endif
#ifdef XTOSTRUCT_XML
#include "xml_reader.h"
#include "xml_writer.h"
#endif
#ifdef XTOSTRUCT_BSON
#include "bson_reader.h"
#include "bson_writer.h"
#endif
#ifdef XTOSTRUCT_LIBCONFIG
#include "config_reader.h"
#include "config_writer.h"
#endif
#ifdef XTOSTRUCT_GOCODE
#include <typeinfo>
#include "go_writer.h"
#endif
//#include <iostream>
//using namespace std;
namespace x2struct {
#define X2STRUCT_OPT_M "m" // mandatory
class X {
public:
// string to struct
#ifdef XTOSTRUCT_JSON
template <typename TYPE>
// if set_has is true. can use t.xhas(xxx) to check if json has the key of xxx. but it will slow down
static bool loadjson(const std::string&str, TYPE&t, bool isfile=true, bool set_has=false) {
JsonReader reader(str, isfile);
reader.set_has(set_has);
reader.convert(NULL, t);
return true;
}
/* struct to string */
/*
indentCount 表示缩进的数目,<0表示不换行不缩进0表示换行但是不缩进
indentChar 表示缩进用的字符,要么是' '要么是'\t'
*/
template <typename TYPE>
static std::string tojson(const TYPE&t, const std::string&root="", int indentCount=-1, char indentChar=' ') {
JsonWriter writer(indentCount, indentChar);
writer.convert(root.c_str(), t);
return writer.toStr();
}
#endif
#ifdef XTOSTRUCT_XML
template <typename TYPE>
static bool loadxml(const std::string&str, TYPE&t, bool isfile=true, bool set_has=false) {
XmlReader reader(str, isfile);
reader.set_has(set_has);
reader.convert(NULL, t);
return true;
}
template <typename TYPE>
static std::string toxml(const TYPE&t, const std::string&root, int indentCount=-1, char indentChar=' ') {
XmlWriter writer(indentCount, indentChar);
writer.convert(root.c_str(), t);
return writer.toStr();
}
#endif
// bson
#ifdef XTOSTRUCT_BSON
template <typename TYPE>
static bool loadbson(const uint8_t*data, size_t length, TYPE&t, bool copy=true, bool set_has=false) { // if length==0, get len from data
BsonReader reader(data, length, copy);
reader.set_has(set_has);
reader.convert(NULL, t);
return true;
}
template <typename TYPE>
static bool loadbson(const std::string&data, TYPE&t, bool copy=true, bool set_has=false) { // if length==0, get len from data
BsonReader reader(data, copy);
reader.set_has(set_has);
reader.convert(NULL, t);
return true;
}
template <typename TYPE>
static std::string tobson(const TYPE& t) {
BsonWriter writer;
writer.convert("", t);
return writer.toStr();
}
#endif
// libconfig
#ifdef XTOSTRUCT_LIBCONFIG
template <typename TYPE>
static bool loadconfig(const std::string&str, TYPE&t, bool isfile=true, const std::string&root="", bool set_has=false) {
ConfigReader reader(str, isfile, root);
reader.set_has(set_has);
try {
reader.convert(NULL, t);
return true;
} catch (std::exception &e) {
reader.exception(e);
}
return false;
}
template <typename TYPE>
static std::string toconfig(const TYPE&t, const std::string&root, int indentCount=-1, char indentChar=' ') {
ConfigWriter writer(indentCount, indentChar);
writer.convert(root.c_str(), t);
return writer.toStr();
}
#endif
/* gen golang code*/
#ifdef XTOSTRUCT_GOCODE
template <typename TYPE>
static std::string togocode(const TYPE&t, bool json, bool bson, bool xml) {
std::set<std::string> alls;
GoCode obj(alls, json, bson, xml);
return t.__struct_to_go(obj);
}
#endif
};
} // namespace
#else
#include "traits.h"
#endif // XTOSTRUCT_MACRO_TEST
#define X_STRUCT_FUNC_COMMON \
private: \
std::set<std::string> __x_has_string; \
public: \
x2struct::x_condition_t __x_cond; \
bool xhas(const std::string& name) const { \
return __x_has_string.find(name)!=__x_has_string.end(); \
}
#ifndef X_SUPPORT_C0X
#define X_STRUCT_FUNC_TOX_BEGIN \
template<typename DOC> \
void __x_to_struct(DOC& obj) {
#else
#define X_STRUCT_FUNC_TOX_BEGIN \
template<typename DOC> \
void __x_to_struct(DOC& obj) { auto X_SELF = this;
#define X_STRUCT_FUNC_TOX_BEGIN_OUT(NAME) \
template<typename DOC> \
void x_str_to_struct(DOC& obj, NAME& __xval__) { x2struct::x_fake_set __x_has_string; auto X_SELF = &__xval__;
#endif
// optional
#define X_STRUCT_ACT_TOX_O(M) \
if (obj.convert(#M, X_SELF->M) && obj.set_has()) { \
__x_has_string.insert(#M); \
}
// bit field. must be integer
#define X_STRUCT_ACT_TOX_B(M) \
{ \
x_decltype(M) __tmp; \
if (obj.convert(#M, __tmp)) { \
if (obj.set_has()) { \
__x_has_string.insert(#M); \
} \
X_SELF->M = __tmp; \
} \
}
// mandatory
#define X_STRUCT_ACT_TOX_M(M) \
if (obj.convert(#M, X_SELF->M)) { \
if (obj.set_has()) __x_has_string.insert(#M); \
} else { \
obj.md_exception(#M); \
}
// aliase name
#define X_STRUCT_ACT_TOX_A(M, A_NAME) \
{ \
bool md = false; \
std::string __alias__name__ = obj.hasa(#M, A_NAME, &md); \
const char*__an = __alias__name__.c_str(); \
if (obj.convert(__an, X_SELF->M)) { \
if (obj.set_has()) __x_has_string.insert(#M); \
} else if (obj.convert(#M, X_SELF->M)) { \
if (obj.set_has()) __x_has_string.insert(#M); \
} else if (md) { \
obj.md_exception(__an); \
} \
}
// Inheritance
#define X_STRUCT_ACT_TOX_I(B) B::__x_to_struct(obj);
// conditional
#define X_STRUCT_ACT_TOX_C(M) M.__x_cond.set((void*)this, __x_cond_static_##M<DOC>);
#define X_STRUCT_FUNC_TOX_END }
// struct to string
#ifndef X_SUPPORT_C0X
#define X_STRUCT_FUNC_TOS_BEGIN \
template <class CLASS> \
void __struct_to_str(CLASS& obj, const char *root) const { (void)root;
#else
#define X_STRUCT_FUNC_TOS_BEGIN \
template <class CLASS> \
void __struct_to_str(CLASS& obj, const char *root) const { (void)root;auto X_SELF = this;
#define X_STRUCT_FUNC_TOS_BEGIN_OUT(NAME) \
template <class CLASS> \
void x_struct_to_str(CLASS& obj, const char *root, const NAME&__xval__) { (void)root;auto X_SELF = &__xval__;
#endif
#define X_STRUCT_ACT_TOS_O(M) \
obj.convert(#M, X_SELF->M);
#define X_STRUCT_ACT_TOS_A(M, A_NAME) \
obj.convert(x2struct::Util::alias_parse(#M, A_NAME, obj.type(), 0).c_str(), X_SELF->M);
// Inheritance
#define X_STRUCT_ACT_TOS_I(B) B::__struct_to_str(obj, root);
#define X_STRUCT_FUNC_TOS_END \
}
// struct to golang code
#define X_STRUCT_FUNC_TOG_BEGIN \
std::string __struct_to_go(x2struct::GoCode &obj) const { \
obj.set_type_id_name(typeid(*this).name());
#define X_STRUCT_ACT_TOG_O(M) \
obj.convert(M, #M);
#define X_STRUCT_ACT_TOG_A(M, A_NAME) \
obj.convert(M, #M, A_NAME);
#define X_STRUCT_FUNC_TOG_END \
return obj.str(); \
}
// expand macro depend on parameters number
#define X_STRUCT_COUNT(LEVEL, ACTION, _32,_31,_30,_29,_28,_27,_26,_25,_24,_23,_22,_21,_20,_19,_18,_17,_16,_15,_14,_13,_12,_11,_10,_9,_8,_7,_6,_5,_4,_3,_2,_1,N,...) LEVEL##N
#define X_STRUCT_EXPAND(...) __VA_ARGS__
/*
work with X_STRUCT_N to expand macro
struct MyX {
int a;
std::string b;
double c;
XTOSTRUCT(A(a,"_id"), O(b,c));
};
macro expand order:
XTOSTRUCT(A(a,"_id"), O(b,c))
--> X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOX, , A(a, "_id"), O(b,c))
--> X_STRUCT_L1_2(X_STRUCT_L1_TOX, A(a, "_id"), O(b,c))
--> X_STRUCT_L1_TOX(A(a, "_id")) X_STRUCT_L1_TOX(O(b,c))
--> X_STRUCT_L1_TOX_A(a, "_id") X_STRUCT_L1_TOX_O(b,c)
--> X_STRUCT_ACT_TOX_A(a, "_id") X_STRUCT_N2(X_STRUCT_L2, X_STRUCT_ACT_TOX_O, b, c) // https://gcc.gnu.org/onlinedocs/cpp/Self-Referential-Macros.html so we need define X_STRUCT_N2. if use X_STRUCT_N preprocessor will treat is as Self-Referential-Macros
--> X_STRUCT_ACT_TOX_A(a, "_id") X_STRUCT_L2_2(X_STRUCT_ACT_TOX_O, b, c)
--> X_STRUCT_ACT_TOX_A(a, "_id") X_STRUCT_ACT_TOX_O(b) X_STRUCT_ACT_TOX_O(c)
--> // expand to convert code
*/
#define X_STRUCT_L1_TOX(x) X_STRUCT_L1_TOX_##x
#define X_STRUCT_L1_TOS(x) X_STRUCT_L1_TOS_##x
#define X_STRUCT_L1_TOG(x) X_STRUCT_L1_TOG_##x
/*
O Optional
M Mandatory
A Aliase
I Inherit
C Conditon
*/
// string to object
#define X_STRUCT_L1_TOX_O(...) X_STRUCT_N2(X_STRUCT_L2, X_STRUCT_ACT_TOX_O, __VA_ARGS__)
#define X_STRUCT_L1_TOX_M(...) X_STRUCT_N2(X_STRUCT_L2, X_STRUCT_ACT_TOX_M, __VA_ARGS__)
#define X_STRUCT_L1_TOX_A(M,A) X_STRUCT_ACT_TOX_A(M, A)
#define X_STRUCT_L1_TOX_I(...) X_STRUCT_N2(X_STRUCT_L2, X_STRUCT_ACT_TOX_I, __VA_ARGS__)
#define X_STRUCT_L1_TOX_B(...) X_STRUCT_N2(X_STRUCT_L2, X_STRUCT_ACT_TOX_B, __VA_ARGS__)
#define X_STRUCT_L1_TOX_C(...) X_STRUCT_N2(X_STRUCT_L2, X_STRUCT_ACT_TOX_C, __VA_ARGS__)
// object to string
#define X_STRUCT_L1_TOS_O(...) X_STRUCT_N2(X_STRUCT_L2, X_STRUCT_ACT_TOS_O, __VA_ARGS__)
#define X_STRUCT_L1_TOS_M X_STRUCT_L1_TOS_O
#define X_STRUCT_L1_TOS_A(M,A) X_STRUCT_ACT_TOS_A(M, A)
#define X_STRUCT_L1_TOS_I(...) X_STRUCT_N2(X_STRUCT_L2, X_STRUCT_ACT_TOS_I, __VA_ARGS__)
#define X_STRUCT_L1_TOS_B X_STRUCT_L1_TOS_O
#define X_STRUCT_L1_TOS_C(...)
// to Golang code
#define X_STRUCT_L1_TOG_O(...) X_STRUCT_N2(X_STRUCT_L2, X_STRUCT_ACT_TOG_O, __VA_ARGS__)
#define X_STRUCT_L1_TOG_M X_STRUCT_L1_TOG_O
#define X_STRUCT_L1_TOG_A(M,A) X_STRUCT_ACT_TOG_A(M, A)
#ifndef _MSC_VER
#define X_STRUCT_N(LEVEL, ACTION, ...) X_STRUCT_COUNT(LEVEL, ACTION, __VA_ARGS__, _32,_31,_30,_29,_28,_27,_26,_25,_24,_23,_22,_21,_20,_19,_18,_17,_16,_15,_14,_13,_12,_11,_10,_9,_8,_7,_6,_5,_4,_3,_2,_1) (ACTION, __VA_ARGS__)
#define X_STRUCT_N2(LEVEL, ACTION, ...) X_STRUCT_COUNT(LEVEL, ACTION, __VA_ARGS__, _32,_31,_30,_29,_28,_27,_26,_25,_24,_23,_22,_21,_20,_19,_18,_17,_16,_15,_14,_13,_12,_11,_10,_9,_8,_7,_6,_5,_4,_3,_2,_1) (ACTION, __VA_ARGS__)
#define X_STRUCT_L1_DEF(ACT, M) ACT(M) // here will expand to ACT(O(xxx)), ACT(A(a,x)), ACT(M(xxx))
#define X_STRUCT_L1_1(ACT, M) X_STRUCT_L1_DEF(ACT, M)
#define X_STRUCT_L1_2(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_1(ACT, __VA_ARGS__)
#define X_STRUCT_L1_3(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_2(ACT, __VA_ARGS__)
#define X_STRUCT_L1_4(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_3(ACT, __VA_ARGS__)
#define X_STRUCT_L1_5(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_4(ACT, __VA_ARGS__)
#define X_STRUCT_L1_6(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_5(ACT, __VA_ARGS__)
#define X_STRUCT_L1_7(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_6(ACT, __VA_ARGS__)
#define X_STRUCT_L1_8(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_7(ACT, __VA_ARGS__)
#define X_STRUCT_L1_9(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_8(ACT, __VA_ARGS__)
#define X_STRUCT_L1_10(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_9(ACT, __VA_ARGS__)
#define X_STRUCT_L1_11(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_10(ACT, __VA_ARGS__)
#define X_STRUCT_L1_12(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_11(ACT, __VA_ARGS__)
#define X_STRUCT_L1_13(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_12(ACT, __VA_ARGS__)
#define X_STRUCT_L1_14(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_13(ACT, __VA_ARGS__)
#define X_STRUCT_L1_15(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_14(ACT, __VA_ARGS__)
#define X_STRUCT_L1_16(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_15(ACT, __VA_ARGS__)
#define X_STRUCT_L1_17(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_16(ACT, __VA_ARGS__)
#define X_STRUCT_L1_18(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_17(ACT, __VA_ARGS__)
#define X_STRUCT_L1_19(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_18(ACT, __VA_ARGS__)
#define X_STRUCT_L1_20(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_19(ACT, __VA_ARGS__)
#define X_STRUCT_L1_21(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_20(ACT, __VA_ARGS__)
#define X_STRUCT_L1_22(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_21(ACT, __VA_ARGS__)
#define X_STRUCT_L1_23(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_22(ACT, __VA_ARGS__)
#define X_STRUCT_L1_24(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_23(ACT, __VA_ARGS__)
#define X_STRUCT_L1_25(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_24(ACT, __VA_ARGS__)
#define X_STRUCT_L1_26(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_25(ACT, __VA_ARGS__)
#define X_STRUCT_L1_27(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_26(ACT, __VA_ARGS__)
#define X_STRUCT_L1_28(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_27(ACT, __VA_ARGS__)
#define X_STRUCT_L1_29(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_28(ACT, __VA_ARGS__)
#define X_STRUCT_L1_30(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_29(ACT, __VA_ARGS__)
#define X_STRUCT_L1_31(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_30(ACT, __VA_ARGS__)
#define X_STRUCT_L1_32(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_31(ACT, __VA_ARGS__)
#define X_STRUCT_L2_DEF(ACT, M) ACT(M)
#define X_STRUCT_L2_1(ACT, M) X_STRUCT_L2_DEF(ACT, M)
#define X_STRUCT_L2_2(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_1(ACT, __VA_ARGS__)
#define X_STRUCT_L2_3(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_2(ACT, __VA_ARGS__)
#define X_STRUCT_L2_4(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_3(ACT, __VA_ARGS__)
#define X_STRUCT_L2_5(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_4(ACT, __VA_ARGS__)
#define X_STRUCT_L2_6(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_5(ACT, __VA_ARGS__)
#define X_STRUCT_L2_7(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_6(ACT, __VA_ARGS__)
#define X_STRUCT_L2_8(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_7(ACT, __VA_ARGS__)
#define X_STRUCT_L2_9(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_8(ACT, __VA_ARGS__)
#define X_STRUCT_L2_10(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_9(ACT, __VA_ARGS__)
#define X_STRUCT_L2_11(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_10(ACT, __VA_ARGS__)
#define X_STRUCT_L2_12(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_11(ACT, __VA_ARGS__)
#define X_STRUCT_L2_13(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_12(ACT, __VA_ARGS__)
#define X_STRUCT_L2_14(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_13(ACT, __VA_ARGS__)
#define X_STRUCT_L2_15(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_14(ACT, __VA_ARGS__)
#define X_STRUCT_L2_16(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_15(ACT, __VA_ARGS__)
#define X_STRUCT_L2_17(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_16(ACT, __VA_ARGS__)
#define X_STRUCT_L2_18(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_17(ACT, __VA_ARGS__)
#define X_STRUCT_L2_19(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_18(ACT, __VA_ARGS__)
#define X_STRUCT_L2_20(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_19(ACT, __VA_ARGS__)
#define X_STRUCT_L2_21(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_20(ACT, __VA_ARGS__)
#define X_STRUCT_L2_22(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_21(ACT, __VA_ARGS__)
#define X_STRUCT_L2_23(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_22(ACT, __VA_ARGS__)
#define X_STRUCT_L2_24(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_23(ACT, __VA_ARGS__)
#define X_STRUCT_L2_25(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_24(ACT, __VA_ARGS__)
#define X_STRUCT_L2_26(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_25(ACT, __VA_ARGS__)
#define X_STRUCT_L2_27(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_26(ACT, __VA_ARGS__)
#define X_STRUCT_L2_28(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_27(ACT, __VA_ARGS__)
#define X_STRUCT_L2_29(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_28(ACT, __VA_ARGS__)
#define X_STRUCT_L2_30(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_29(ACT, __VA_ARGS__)
#define X_STRUCT_L2_31(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_30(ACT, __VA_ARGS__)
#define X_STRUCT_L2_32(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_31(ACT, __VA_ARGS__)
#else
// thx https://stackoverflow.com/questions/5134523/msvc-doesnt-expand-va-args-correctly
// in MSVC's preprocessor, __VA_ARGS__ is treat as a normal parameter, so it will expand at last, and in gcc, it's expand at first. so we need expand it first
#define X_STRUCT_N(LEVEL, ACTION, ...) X_STRUCT_EXPAND(X_STRUCT_COUNT(LEVEL, ACTION, __VA_ARGS__,_32,_31,_30,_29,_28,_27,_26,_25,_24,_23,_22,_21,_20,_19,_18,_17,_16,_15,_14,_13,_12,_11,_10,_9,_8,_7,_6,_5,_4,_3,_2,_1)) X_STRUCT_EXPAND((ACTION, __VA_ARGS__))
#define X_STRUCT_N2(LEVEL, ACTION, ...) X_STRUCT_EXPAND(X_STRUCT_COUNT(LEVEL, ACTION, __VA_ARGS__,_32,_31,_30,_29,_28,_27,_26,_25,_24,_23,_22,_21,_20,_19,_18,_17,_16,_15,_14,_13,_12,_11,_10,_9,_8,_7,_6,_5,_4,_3,_2,_1)) X_STRUCT_EXPAND((ACTION, __VA_ARGS__))
#define X_STRUCT_L1_DEF(ACT, M) ACT(M) // here will expand to ACT(O(xxx)), ACT(A(a,x)), ACT(M(xxx))
#define X_STRUCT_L1_1(ACT, M) X_STRUCT_L1_DEF(ACT, M)
#define X_STRUCT_L1_2(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_1 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_3(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_2 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_4(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_3 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_5(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_4 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_6(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_5 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_7(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_6 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_8(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_7 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_9(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_8 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_10(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_9 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_11(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_10 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_12(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_11 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_13(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_12 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_14(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_13 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_15(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_14 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_16(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_15 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_17(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_16 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_18(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_17 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_19(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_18 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_20(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_19 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_21(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_20 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_22(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_21 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_23(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_22 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_24(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_23 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_25(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_24 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_26(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_25 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_27(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_26 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_28(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_27 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_29(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_28 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_30(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_29 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_31(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_30 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L1_32(ACT, M,...) X_STRUCT_L1_DEF(ACT, M) X_STRUCT_L1_31 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_DEF(ACT, M) ACT(M)
#define X_STRUCT_L2_1(ACT, M) X_STRUCT_L2_DEF(ACT, M)
#define X_STRUCT_L2_2(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_1 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_3(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_2 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_4(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_3 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_5(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_4 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_6(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_5 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_7(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_6 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_8(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_7 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_9(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_8 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_10(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_9 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_11(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_10 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_12(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_11 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_13(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_12 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_14(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_13 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_15(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_14 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_16(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_15 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_17(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_16 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_18(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_17 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_19(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_18 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_20(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_19 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_21(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_20 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_22(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_21 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_23(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_22 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_24(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_23 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_25(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_24 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_26(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_25 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_27(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_26 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_28(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_27 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_29(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_28 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_30(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_29 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_31(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_30 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#define X_STRUCT_L2_32(ACT, M,...) X_STRUCT_L2_DEF(ACT, M) X_STRUCT_L2_31 X_STRUCT_EXPAND((ACT, __VA_ARGS__))
#endif
#ifdef XTOSTRUCT_GOCODE
#define XTOSTRUCT(...) \
X_STRUCT_FUNC_COMMON \
X_STRUCT_FUNC_TOX_BEGIN X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOX, __VA_ARGS__) X_STRUCT_FUNC_TOX_END \
X_STRUCT_FUNC_TOS_BEGIN X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOS, __VA_ARGS__) X_STRUCT_FUNC_TOS_END \
X_STRUCT_FUNC_TOG_BEGIN X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOG, __VA_ARGS__) X_STRUCT_FUNC_TOG_END
#else
#define XTOSTRUCT(...) \
X_STRUCT_FUNC_COMMON \
X_STRUCT_FUNC_TOX_BEGIN X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOX, __VA_ARGS__) X_STRUCT_FUNC_TOX_END \
X_STRUCT_FUNC_TOS_BEGIN X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOS, __VA_ARGS__) X_STRUCT_FUNC_TOS_END
#endif
// for class/struct that could not modify(could not add XTOSTUCT macro)
#define XTOSTRUCT_OUT(NAME, ...) \
X_STRUCT_FUNC_TOX_BEGIN_OUT(NAME) X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOX, __VA_ARGS__) X_STRUCT_FUNC_TOX_END \
X_STRUCT_FUNC_TOS_BEGIN_OUT(NAME) X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOS, __VA_ARGS__) X_STRUCT_FUNC_TOS_END
/////////////////////////////////////////////////////////////////////
// for local class, gen code without template (no template) BEGIN
/////////////////////////////////////////////////////////////////////
// generate typedef
#define X_STRUCT_NT_TYPEDEF(M, x) typedef x2struct::M##Reader __XReader_##x; typedef x2struct::M##Writer __XWriter_##x;
#define X_STRUCT_NT_TYPE_1(ACT, M) ACT(M,1)
#define X_STRUCT_NT_TYPE_2(ACT, M,...) ACT(M,2) X_STRUCT_NT_TYPE_1(ACT, __VA_ARGS__)
#define X_STRUCT_NT_TYPE_3(ACT, M,...) ACT(M,3) X_STRUCT_NT_TYPE_2(ACT, __VA_ARGS__)
#define X_STRUCT_NT_TYPE_4(ACT, M,...) ACT(M,4) X_STRUCT_NT_TYPE_3(ACT, __VA_ARGS__)
// generate convert function
#define X_STRUCT_FUNC_TOX_BEGIN_NT(x) \
void __x_to_struct(__XReader_##x& obj) {
#define X_STRUCT_FUNC_TOS_BEGIN_NT(x) \
void __struct_to_str(__XWriter_##x& obj, const char *root) const {
#define X_STRUCT_NT_BODY_1(...) X_STRUCT_FUNC_TOX_BEGIN_NT(1) X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOX, __VA_ARGS__) X_STRUCT_FUNC_TOX_END X_STRUCT_FUNC_TOS_BEGIN_NT(1) X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOS, __VA_ARGS__) X_STRUCT_FUNC_TOS_END
#define X_STRUCT_NT_BODY_2(...) X_STRUCT_FUNC_TOX_BEGIN_NT(2) X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOX, __VA_ARGS__) X_STRUCT_FUNC_TOX_END X_STRUCT_FUNC_TOS_BEGIN_NT(2) X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOS, __VA_ARGS__) X_STRUCT_FUNC_TOS_END X_STRUCT_NT_BODY_1(__VA_ARGS__)
#define X_STRUCT_NT_BODY_3(...) X_STRUCT_FUNC_TOX_BEGIN_NT(3) X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOX, __VA_ARGS__) X_STRUCT_FUNC_TOX_END X_STRUCT_FUNC_TOS_BEGIN_NT(3) X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOS, __VA_ARGS__) X_STRUCT_FUNC_TOS_END X_STRUCT_NT_BODY_2(__VA_ARGS__)
#define X_STRUCT_NT_BODY_4(...) X_STRUCT_FUNC_TOX_BEGIN_NT(4) X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOX, __VA_ARGS__) X_STRUCT_FUNC_TOX_END X_STRUCT_FUNC_TOS_BEGIN_NT(4) X_STRUCT_N(X_STRUCT_L1, X_STRUCT_L1_TOS, __VA_ARGS__) X_STRUCT_FUNC_TOS_END X_STRUCT_NT_BODY_3(__VA_ARGS__)
// XTOSTRUCT_NT(types)(O(xx), A(xx), M(xx)) need c++11 or later
#define XTOSTRUCT_NT(...) \
X_STRUCT_FUNC_COMMON \
X_STRUCT_N(X_STRUCT_NT_TYPE, X_STRUCT_NT_TYPEDEF, __VA_ARGS__) X_STRUCT_EXPAND(X_STRUCT_COUNT(X_STRUCT_NT_BODY,a,__VA_ARGS__, _32,_31,_30,_29,_28,_27,_26,_25,_24,_23,_22,_21,_20,_19,_18,_17,_16,_15,_14,_13,_12,_11,_10,_9,_8,_7,_6,_5,_4,_3,_2,_1))
/////////////////////////////////////////////////////////////////////
// for local class, gen code without template (no template) END
/////////////////////////////////////////////////////////////////////
// C is class name, M is member name
#define XTOSTRUCT_CONDITION(C, M) \
template<typename DOC> \
static bool __x_cond_static_##M(void* obj, void* doc) { \
C *self = static_cast<C*>(obj); \
return self->__x_cond_##M(*(static_cast<DOC*>(doc))); \
} \
template<typename DOC> \
bool __x_cond_##M(DOC& obj)
#endif