JSON for Modern C++ 1.0.0-rc1

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~basic_json
| 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>
bool operator== | ( | std::nullptr_t | ,
|  | const_reference | v
| ) |  |
| friend
  comparison: equal The functions compares the given JSON value against a null pointer. As the null pointer can be used to initialize a JSON value to null, a comparison of JSON value v with a null pointer should be equivalent to call `v.is_null()`. Parameters
  [in] | v | JSON value to consider
Returns whether v is null Complexity Constant. Example The example compares several JSON types to the null pointer. 1 #include <json.hpp> 2 3 using namespace nlohmann; 4 5 int main() 6 { 7 // create several JSON values 8 json array = {1, 2, 3}; 9 json object = {{"A", "a"}, {"B", "b"}}; 10 json number = 17; 11 json string = "foo"; 12 json null; 13 14 // output values and comparisons 15 std::cout << std::boolalpha; 16 std::cout << array << " == nullptr " << (array == nullptr) << '\n'; 17 std::cout << object << " == nullptr " << (object == nullptr) << '\n'; 18 std::cout << number << " == nullptr " << (number == nullptr) << '\n'; 19 std::cout << string << " == nullptr " << (string == nullptr) << '\n'; 20 std::cout << null << " == nullptr " << (null == nullptr) << '\n'; 21 } nlohmann::basic_json a class to store JSON values Definition: json.hpp:187 nlohmann namespace for Niels Lohmann Definition: json.hpp:78 Output (play with this example online):
    [1,2,3] == nullptr false
    {"A":"a","B":"b"} == nullptr false
    17 == nullptr false
    "foo" == nullptr false
    null == nullptr true
The example code above can be translated with
    g++ -std=c++11 -Isrc doc/examples/operator__equal__nullptr_t.cpp -o operator__equal__nullptr_t
Since version 1.0 Definition at line 4423 of file json.hpp.