oxy::push_optional_f Struct Reference

Functor to push an optional value into a JSON object. More...

#include <json_helper.hpp>

Public Member Functions
template<class T>
json::value &	operator() (json::value &jv, json::string_view key, std::optional< T > const &item) const

Detailed Description

Functor to push an optional value into a JSON object.

This functor provides an operator() that takes a JSON value, a key, and an optional item of a generic type T. It checks if the JSON value is an object, and if not, it emplaces an empty object. It then inserts or assigns the key-value pair in the JSON object, where the value is obtained by converting the item to a JSON value using json::value_from if the optional has a value, or json::value_from(nullptr) if the optional is empty. The functor returns a reference to the modified JSON value, allowing for chaining of operations.

Member Function Documentation

operator()()

template<class T>

json::value & oxy::push_optional_f::operator() ( json::value & jv, json::string_view key, std::optional< T > const & item ) const

inline

Template Parameters

T	- The type of the item to be pushed into the JSON object.

Parameters

jv	- The JSON value to modify.
key	- The key to set in the JSON object.
item	- The optional item to set in the JSON object.

Returns

A reference to the modified JSON value.