allocator_type
array
array_t
at
at
at
at
back
back
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
begin
begin
boolean_t
cbegin
cend
clear
const_pointer
const_reference
const_reverse_iterator
count
crbegin
crend
difference_type
dump
empty
end
end
erase
erase
erase
erase
find
find
front
front
get
get
get
get_allocator
get_ptr
get_ptr
get_ref
get_ref
insert
insert
insert
insert
insert
is_array
is_boolean
is_discarded
is_null
is_number
is_number_float
is_number_integer
is_object
is_primitive
is_string
is_structured
iterator_wrapper
iterator_wrapper
max_size
number_float_t
number_integer_t
object
object_t
operator value_t
operator ValueType
operator!=
operator!=
operator!=
operator+=
operator+=
operator+=
operator<
operator<
operator<<
operator<<
operator<=
operator=
operator==
operator==
operator==
operator>
operator>=
operator>>
operator>>
operator[]
operator[]
operator[]
operator[]
operator[]
operator[]
operator[]
operator[]
parse
parse
parse
parse_event_t
parser_callback_t
pointer
push_back
push_back
push_back
rbegin
rbegin
reference
rend
rend
reverse_iterator
size
size_type
string_t
swap
swap
swap
swap
type
value
value
value_t
value_type
~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 nlohmann::basic_json::is_number_integer | ( |  | ) | const

inlinenoexcept

This function returns true iff the JSON value is an integer number. This excludes floating-point values.

Returns
  `true` if type is an integer number, `false` otherwise.

Complexity
  Constant.

Example
  The following code exemplifies is_number_integer for all JSON types.
  #include <json.hpp>
  using namespace nlohmann;
  int main()
  {
  // create JSON values
  json j_null;
  json j_boolean = true;
  json j_number_integer = 17;
  json j_number_float = 23.42;
  json j_object = {{"one", 1}, {"two", 2}};
  json j_array = {1, 2, 4, 8, 16};
  json j_string = "Hello, world";
  // call is_number_integer()
  std::cout << std::boolalpha;
  std::cout << j_null.is_number_integer() << '\n';
  std::cout << j_boolean.is_number_integer() << '\n';
  std::cout << j_number_integer.is_number_integer() << '\n';
  std::cout << j_number_float.is_number_integer() << '\n';
  std::cout << j_object.is_number_integer() << '\n';
  std::cout << j_array.is_number_integer() << '\n';
  std::cout << j_string.is_number_integer() << '\n';
  }
  nlohmann::basic_json
  a class to store JSON values
  Definition: json.hpp:191
  nlohmann::basic_json::is_number_integer
  bool is_number_integer() const noexcept
  return whether value is an integer number
  Definition: json.hpp:2043
  nlohmann
  namespace for Niels Lohmann
  Definition: json.hpp:88
  Output (play with this example online):

      false
      false
      true
      false
      false
      false
      false

  The example code above can be translated with

      g++ -std=c++11 -Isrc doc/examples/is_number_integer.cpp -o is_number_integer

See also
  is_number() – check if value is a number
  is_number_float() – check if value is a floating-point number

Since
  version 1.0.0

Definition at line 2043 of file json.hpp.