Function basics_json_example1

examples/src/basics_examples.cpp:13–134

using namespace jsoncons::jsonpath;

void basics_json_example1()
{
    // Construct a book object
    json book1;

    book1["category"] = "Fiction";
    book1["title"] = "A Wild Sheep Chase: A Novel";
    book1["author"] = "Haruki Murakami";
    book1["date"] = "2002-04-09";
    book1["price"] = 9.01;
    book1["isbn"] = "037571894X";  

    // Construct another using the member function insert_or_assign
    json book2;

    book2.insert_or_assign("category", "History");
    book2.insert_or_assign("title", "Charlie Wilson's War");
    book2.insert_or_assign("author", "George Crile");
    book2.insert_or_assign("date", "2007-11-06");
    book2.insert_or_assign("price", 10.50);
    book2.insert_or_assign("isbn", "0802143415");  

    // Use insert_or_assign again, but more efficiently
    json book3;

    // Reserve memory, to avoid reallocations
    book3.reserve(6);

    // Insert in name alphabetical order
    // Give insert_or_assign a hint where to insert the next member
    auto hint = book3.insert_or_assign(book3.object_range().begin(),"author", "Haruki Murakami");
    hint = book3.insert_or_assign(hint, "category", "Fiction");
    hint = book3.insert_or_assign(hint, "date", "2006-01-03");
    hint = book3.insert_or_assign(hint, "isbn", "1400079276");  
    hint = book3.insert_or_assign(hint, "price", 13.45);
    hint = book3.insert_or_assign(hint, "title", "Kafka on the Shore");

    // Construct a fourth from a string
    json book4 = json::parse(R"(
    {
        "category" : "Fiction",
        "title" : "Pulp",
        "author" : "Charles Bukowski",
        "date" : "2004-07-08",
        "price" : 22.48,
        "isbn" : "1852272007"  
    }
    )");

    // Construct a booklist array
    json booklist(json_array_arg);

    // For efficiency, reserve memory, to avoid reallocations
    booklist.reserve(4);

    // For efficency, tell jsoncons to move the contents 
    // of the four book objects into the array
    booklist.push_back(std::move(book1));