mirror of
https://github.com/nlohmann/json.git
synced 2024-08-21 20:42:29 +02:00
* mkdocs: add string_view examples * mkdocs: reference underlying operators * mkdocs: add operator<=> examples * mkdocs: fix style check issues * mkdocs: tweak BJData page * mkdocs: add CMake option hints to macros * mkdocs: fix JSON_DISABLE_ENUM_SERIALIZATION definition * mkdocs: fix link to unit-udt.cpp * mkdocs: fix "Arbitrary Type Conversions" title * mkdocs: link to api/macros/*.md instead of features/macros.md * mkdocs: document JSON_DisableEnumSerialization CMake option * mkdocs: encode required C++ standard in example files * docset: detect gsed/sed * docset: update index * docset: fix CSS patching * docset: add list_missing_pages make target * docset: add list_removed_paths make target * docset: replace page titles with name from index * docset: add install target for Zeal docset browser * Use GCC_TOOL in ci_test_documentation target
35 lines
734 B
C++
35 lines
734 B
C++
#include <iostream>
|
|
#include <iomanip>
|
|
#include <string_view>
|
|
#include <nlohmann/json.hpp>
|
|
|
|
using namespace std::string_view_literals;
|
|
using json = nlohmann::json;
|
|
|
|
int main()
|
|
{
|
|
// create a JSON object
|
|
json object =
|
|
{
|
|
{"one", 1}, {"two", 2}, {"three", 2.9}
|
|
};
|
|
|
|
// output element with key "two"
|
|
std::cout << object["two"sv] << "\n\n";
|
|
|
|
// change element with key "three"
|
|
object["three"sv] = 3;
|
|
|
|
// output changed array
|
|
std::cout << std::setw(4) << object << "\n\n";
|
|
|
|
// mention nonexisting key
|
|
object["four"sv];
|
|
|
|
// write to nonexisting key
|
|
object["five"sv]["really"sv]["nested"sv] = true;
|
|
|
|
// output changed object
|
|
std::cout << std::setw(4) << object << '\n';
|
|
}
|