JSON for Modern C++  1.1.0
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 = int64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator>
template<typename CompatibleNumberIntegerType , typename std::enable_if< std::is_constructible< number_integer_t, CompatibleNumberIntegerType >::value andstd::numeric_limits< CompatibleNumberIntegerType >::is_integer, CompatibleNumberIntegerType >::type = 0>
nlohmann::basic_json::basic_json ( const CompatibleNumberIntegerType  val)
inlinenoexcept

Create an integer number JSON value with a given content. This constructor allows any type that can be used to construct values of type number_integer_t. Examples may include the types int, int32_t, or short.

Template Parameters
CompatibleNumberIntegerTypean integer type which is compatible to number_integer_t.
Parameters
[in]valan integer to create a JSON number from
Complexity
Constant.
Example
The example below shows the construction of several JSON integer number values from compatible types.
1 #include <json.hpp>
2 
3 using namespace nlohmann;
4 
5 int main()
6 {
7  // create values of different integer types
8  short n42 = 42;
9  int n23 = 23;
10  long n1024 = 1024;
11  int_least32_t n17 = 17;
12  uint8_t n8 = 8;
13 
14  // create JSON numbers
15  json j42(n42);
16  json j23(n23);
17  json j1024(n1024);
18  json j17(n17);
19  json j8(n8);
20 
21  // serialize the JSON numbers
22  std::cout << j42 << '\n';
23  std::cout << j23 << '\n';
24  std::cout << j1024 << '\n';
25  std::cout << j17 << '\n';
26  std::cout << j8 << '\n';
27 }
a class to store JSON values
Definition: json.hpp:191
namespace for Niels Lohmann
Definition: json.hpp:88
Output (play with this example online):
42
23
1024
17
8
The example code above can be translated with
g++ -std=c++11 -Isrc doc/examples/basic_json__CompatibleIntegerNumberType.cpp -o basic_json__CompatibleIntegerNumberType 
See also
basic_json(const number_integer_t) – create a number value (integer)
basic_json(const int) – create a number value (integer)
Since
version 1.0.0

Definition at line 1239 of file json.hpp.