A very simple JSON parser for c++

Currently in the works. This is based off of the jute code. This project is looking to add new features, increase performance, and reduce overhead and resource usage.

data.json:

{
   "examples": [
      {
         "tag_name": "a",
         "attr": [
            {
               "key": "href",
               "value": "http://amir.saboury.net"
            },
            {
               "key": "target",
               "value": "_blank"
            }
         ]
      },
      {
         "this_is": [
            "array",
            "of",
            "strings"
         ],
         "number_array": [
            1,
            2,
            4,
            8,
            16
         ],
         "pie": 3.14,
         "boolean": true,
         "bug": null,
         "mixed": [
            1,
            2,
            {
               "test1": -1.2345,
               "test2": false
            },
            null,
            0.4,
            [
               "nested",
               [
                  "array",
                  true
               ]
            ],
            "end of story!"
         ]
      },
      {
         "done": true
      }
   ]
}

example "main.cpp" file

#include <iostream>
#include <vector>
#include <map>
#include <string>
#include <sstream>
#include <fstream>
#include <cstring>
#include "jute.h"
using namespace std;

int main () {
    ifstream in("data.json");
    string str = "";
    string tmp;
    while (getline(in, tmp)) str += tmp;
    jute::jValue v = jute::parser::parse(str);
    cout << v.to_string() << endl;
    cout << " ------ " << endl;
    cout << v["examples"][0]["attr"][0]["value"].as_string() << endl;
    if (v["examples"][1]["mixed"][5][1][1].as_bool()) {
        cout << v["examples"][1]["pie"].as_double() << endl;
        cout << v["examples"][2].to_string() << endl;
    }
    // You can get type of a jValue by calling its get_type() function
    // It returns a jType which can be one of these:
    //    {JSTRING, JOBJECT, JARRAY, JBOOLEAN, JNUMBER, JNULL, JUNKNOWN}
    //
    //    if (v["examples"][1]["mixed"][5][1][1].get_type() == jute::JBOOLEAN) ...
    return 0;
}

Note:

This version is not providing error checking (yet). All functions assume the input string is in valid format of JSON. Also number format checking is poor. Improvements are welcome. Read the source code; it is just around 350 LOC, give or take 😄

License: MIT