Convert .proto file to header-only RapidJSON based c++ code
Project description
Proto2RapidJSON
简介
本工具旨在利用proto文件生成基于RapidJSON的JSON文件解析与序列化的C++工具。
- 本工具只会支持最基本的类proto语法,但保证其强类型属性;
- 本工具生成的C++代码只依赖RapidJSON与C++11 STL;
- 本工具支持//注释。
基本格式
package test;
message B {
bool isok;
}
message A {
double x;
int32 y;
repeated B b;
}
对应的JSON文件(message A对应的)为
{
"x": 1.24,
"y": 123,
"b": [
{
"isok": true
},
{
"isok": false
}
]
}
注:暂不允许可选属性,但允许额外的属性(不会被解析)。
生成的C++文件应该包含结构体与接口如下
struct B {
bool isok;
B& FromString(const char* str);
B& FromValue(const rapidjson::Value& v);
std::string ToString();
std::string ToPrettyString();
rapidjson::Value ToValue(rapidjson::Document::AllocatorType& allocator);
}
struct A {
double x;
int y;
std::vector<B> b;
A& FromString(const char* str);
A& FromValue(const rapidjson::Value& v);
std::string ToString();
std::string ToPrettyString();
rapidjson::Value ToValue(rapidjson::Document::AllocatorType& allocator);
}
保留字
message, package, {}, ;, repeated, double, int32, int64, uint32, uint64, float, bool, string, //
语法
Program -> Package Message*
Package -> "package" id ";"
Message -> "message" id "{" Element* "}"
Element -> Type id ("=" num) ";" | "repeated" Type id ("=" num) ;"
Type -> id | "double" | "float" | "int32" | "uint32" | "int64" | "uint64" | "bool" | "string"
注1:("=" num)
仅用于兼容proto
文件格式,不起任何作用
注2:id
允许包含数字与下划线,且不允许数字开头
使用
在完成安装pip install .
后,可以使用如下指令执行:
python -m proto2rapidjson -i <INPUT> -o <OUTPUT>
计划
- 添加序列化的模板
- 编写CLI,生成二进制文件并支持
pip install .
- 完善测试与代码覆盖率测试
- 禁止相同id
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