JSON Toolkit is a swiss-army knife for JSON programming in modern C++. It comes with a built-in parser and growing support for standards such as JSON Schema, JSON Pointer, JSONL, and more. For example:
#include <sourcemeta/jsontoolkit/json.h>
#include <sourcemeta/jsontoolkit/jsonpointer.h>
#include <sstream>
#include <iostream>
#include <stdlib>
#include <utility>
auto main() -> int {
// Parsing a JSON document from a string
auto document{sourcemeta::jsontoolkit::parse(R"JSON({
"name": "John Doe",
"age": 20,
"address": "14 Manchester Road, Coventry CV77 1XN"
})JSON")};
// Updating a property using JSON Pointer
const sourcemeta::jsontoolkit::Pointer pointer{"name"};
sourcemeta::jsontoolkit::JSON new_value{"Jane Doe"};
sourcemeta::jsontoolkit::set(document, pointer, std::move(new_value));
// Pretty-print result
sourcemeta::jsontoolkit::prettify(document, std::cout);
std::cout << "\n";
return EXIT_SUCCESS;
}Refer to the project website for documentation: https://jsontoolkit.sourcemeta.com.