JsonParser

is a JSON parser library for C++.
Get json data as std::istream and return the corresponding AST.
This is a header only library.

CI

Status	Environment
	ubuntu-latest(g++)

Generative Grammar

This library interprets sentences defined as follows as JSON.

<Value> -> String | Number | Boolean | Null | <Object> | <Array>
<Object> -> "{" "}" | "{" String : <Value> {, String : <Value> } "}"  
<Array> -> [ ] | [ <Value> {, <Value>} ]

Example

Create main.cpp and type the following code.

#include <iostream>

#include "src/lexer.h"
#include "src/parser.h"

using namespace std;
using namespace JsonParser;

int main() {
    Node json = Parser(Lexer(cin));
    cout << json.Str() << endl;
    cout << json["user_info"]["user_id"].Value() << endl;
    return 0;
}

Build and run with the following commands(, for example, use clang++).
Of course, set <Your Include Path> based on your environment.

clang++ -I <Your Include Path> ./main.cpp
./a.exe

Enter the following in the standard input.

{ "user_info": { "user_id": "A1234567", "user_name": "Yamada Taro" } } ⏎ Ctrl+z ⏎

Then you can get the response as below.

{"user_info":{"user_id":"A1234567","user_name":"Yamada Taro"}}
A1234567

Document

• Document

Reference

• JSON format

Dependency

• Google Test
• Doxygen

License

• MIT