JSON for Modern C++  2.0.3

§ basic_json() [3/23]

template<template< typename U, typename V, typename... Args > class ObjectType = std::map, template< typename U, typename... Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator>
nlohmann::basic_json::basic_json ( const object_t val)
inline

Create an object JSON value with a given content.

Parameters
[in]vala value for the object
Complexity
Linear in the size of the passed val.
Exceptions
std::bad_allocif allocation for object value fails
Example
The following code shows the constructor with an object_t parameter.
1 #include <json.hpp>
2 
3 using json = nlohmann::json;
4 
5 int main()
6 {
7  // create an object_t value
8  json::object_t value = { {"one", 1}, {"two", 2} };
9 
10  // create a JSON object from the value
11  json j(value);
12 
13  // serialize the JSON object
14  std::cout << j << '\n';
15 }
basic_json<> json
default JSON class
Definition: json.hpp:10122
ObjectType< StringType, basic_json, std::less< StringType >, AllocatorType< std::pair< const StringType, basic_json >>> object_t
a type for an object
Definition: json.hpp:391
Output (play with this example online):
{"one":1,"two":2}
The example code above can be translated with
g++ -std=c++11 -Isrc doc/examples/basic_json__object_t.cpp -o basic_json__object_t 
See also
basic_json(const CompatibleObjectType&) – create an object value from a compatible STL container
Since
version 1.0.0

Definition at line 1112 of file json.hpp.