1. easy to use

const std::string json_str = R"({
 "core": { "editor": "vim", "quotepath":false },
 "user":{ "name":"null" , "email":"xyz_kankan@126.com" },
 "color":{ "ui":true },
 "alias":{
 "ci":"commit",
 "co":"checkout",
 "st":"status",
 "br":"branch",
 "hist":"log --pretty=format:\"%h %ad | %s%d [%an]\" --graph --date=short",
 "dump":"cat-file -p",
 "type":"cat-file -t"
 },
 "diff":{ "tool":"vimdiff" },
 "difftool":{ "prompt":false },
 "merge":{ "tool":"whatever_you_want" }
})";
std::string err;
xusd::Json json = xusd::Json::parse(json_str, err);
//===================================================
json["core"]["editor"] ==> "vim"
json["user"]["email"] ==> "xyz_kankan@126.com"

2. error log

const std::string json_str = R"({
"core": { "editor": "vim", "quotepath":false },
"user":{ "name":"null" , "email":"xyz_kankan@126.com" },
"color":{ "ui":true },
"alias":{
	"ci":"commit",
	"co":"checkout",
	"st":"status",
	"br":"branch",
	"hist":"log --pretty=format:\"%h %ad | %s%d [%an]\" --graph --date=short",
	"dump":"cat-file -p",
	"type":"cat-file -t"
},
"diff":{ "tool":"vimdiff" },
"difftool":{ "prompt":false },
"merge":{ "tool":"whatever_you_want" } true
xxyy})";
xusd::Json json = xusd::Json::parse(json_str, err);
EXPECT_FALSE((err.empty()))<<err;
std::cout<<err<<std::endl;
//===================================
"merge":{ "tool":"whatever_you_want" } true
		 ____________________________^

3. easy initializer and serialization

using namespace xusd;
Json my_json = Json::object {
	{ "key1", "value1" },
		{ "key2", false },
		{ "key3", Json::array { 1, 2, 3 } },
};
std::string json_str = my_json.dump();
// dump ==>
{"key1": "value1", "key2": false, "key3": [1, 2, 3]}

4. support user-defined type

class Point {
public:
 int x;
 int y;
 Point (int x, int y) : x(x), y(y) {}
 xusd::Json to_json() const { return xusd::Json::array { x, y }; }
};
int main(){
 std::vector<Point> points = { { 1, 2 }, { 10, 20 }, { 100, 200 } };
 std::string points_json = Json(points).dump();
 std::cout<<points_json<<std::endl;
}
// dump ==>
[[1, 2], [10, 20], [100, 200]]

Json json = Json::array { Json::object { { "k", "v" } } };
std::string str = json[0]["k"].string_value();

5. support c/c++ language

#include <c/jsonparse.h> // ==> c lang
#include <cpp/json.hpp> // ==> c++ lang

6. very fast

7. lightweigh