JSON for Modern C++ 3.7.1

accept
accept
allocator_type
array
array_t
at
at
at
at
at
at
back
back
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_iterator
const_pointer
const_reference
const_reverse_iterator
contains
contains
count
crbegin
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detail::external_constructor
diff
difference_type
dump
emplace
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empty
end
end
erase
erase
erase
erase
error_handler_t
exception
find
find
flatten
from_bson
from_bson
from_cbor
from_cbor
from_msgpack
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from_ubjson
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front
front
get
get
get
get
get
get
get_allocator
get_ptr
get_ptr
get_ref
get_ref
get_to
get_to
initializer_list_t
input_format_t
insert
insert
insert
insert
insert
insert
insert_iterator
invalid_iterator
is_array
is_boolean
is_discarded
is_null
is_number
is_number_float
is_number_integer
is_number_unsigned
is_object
is_primitive
is_string
is_structured
items
items
iterator
iterator_wrapper
iterator_wrapper
json_pointer
json_sax_t
json_serializer
max_size
merge_patch
meta
number_float_t
number_integer_t
number_unsigned_t
object
object_comparator_t
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>>
operator[]
operator[]
operator[]
operator[]
operator[]
operator[]
operator[]
operator[]
other_error
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parse
parse
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parse_event_t
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patch
pointer
push_back
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rbegin
rbegin
reference
rend
rend
reverse_iterator
sax_parse
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size
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string_t
swap
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swap
swap
to_bson
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to_bson
to_cbor
to_cbor
to_cbor
to_msgpack
to_msgpack
to_msgpack
to_ubjson
to_ubjson
to_ubjson
type
type_error
type_name
unflatten
update
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value
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value_t
value_type
~basic_json
| ## ◆ operator== [3/3] 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, template< typename T, typename SFINAE=void > class JSONSerializer = adl_serializer>
bool operator== | ( | const_reference | lhs,
|  | const_reference | rhs
| ) |  |
| friend
  Compares two JSON values for equality according to the following rules: Two JSON values are equal if (1) they are from the same type and (2) their stored values are the same according to their respective `operator==`. Integer and floating-point numbers are automatically converted before comparison. Note than two NaN values are always treated as unequal. Two JSON null values are equal. Note Floating-point inside JSON values numbers are compared with `json::number_float_t::operator==` which is `double::operator==` by default. To compare floating-point while respecting an epsilon, an alternative comparison function could be used, for instance template<typename T, typename = typename std::enable_if<std::is_floating_point<T>::value, T>::type> inline bool is_same(T a, T b, T epsilon = std::numeric_limits<T>::epsilon()) noexcept { return std::abs(a - b) <= epsilon; } NaN values never compare equal to themselves or to other NaN values. Parameters
  [in] | lhs | first JSON value to consider
  [in] | rhs | second JSON value to consider
  Returns whether the values lhs and rhs are equal Exception safety No-throw guarantee: this function never throws exceptions. Complexity Linear. Example The example demonstrates comparing several JSON types. 1 #include <iostream> 2 #include <nlohmann/json.hpp> 3 4 using json = nlohmann::json; 5 6 int main() 7 { 8 // create several JSON values 9 json array_1 = {1, 2, 3}; 10 json array_2 = {1, 2, 4}; 11 json object_1 = {{"A", "a"}, {"B", "b"}}; 12 json object_2 = {{"B", "b"}, {"A", "a"}}; 13 json number_1 = 17; 14 json number_2 = 17.000000000000001L; 15 json string_1 = "foo"; 16 json string_2 = "bar"; 17 18 // output values and comparisons 19 std::cout << std::boolalpha; 20 std::cout << array_1 << " == " << array_2 << " " << (array_1 == array_2) << '\n'; 21 std::cout << object_1 << " == " << object_2 << " " << (object_1 == object_2) << '\n'; 22 std::cout << number_1 << " == " << number_2 << " " << (number_1 == number_2) << '\n'; 23 std::cout << string_1 << " == " << string_2 << " " << (string_1 == string_2) << '\n'; 24 } Output (play with this example online):
      [1,2,3] == [1,2,4] false
      {"A":"a","B":"b"} == {"A":"a","B":"b"} true
      17 == 17.0 true
      "foo" == "bar" false
  The example code above can be translated with
      g++ -std=c++11 -Isingle_include doc/examples/operator__equal.cpp -o operator__equal
Since version 1.0.0 Definition at line 20177 of file json.hpp.

nlohmann::basic_json::type
constexpr value_t type() const noexcept
return the type of the JSON value (explicit)
Definition: json.hpp:16565
nlohmann::json
basic_json<> json
default JSON class
Definition: json.hpp:2445